Perovskite BaSnO3 Research Articles

Site-specific plan-view (S)TEM sample preparation from thin films using a dual-beam FIB-SEM.

To fully evaluate the atomic structure, and associated properties of materials using transmission electron microscopy, examination of samples from three non-collinear orientations is needed. This is particularly challenging for thin films and nanoscale devices built on substrates due to limitations with plan-view sample preparation. In this work, a new method for preparation of high-quality, site-specific, plan-view TEM samples from thin-films grown on substrates, is presented and discussed. It is based on using a dual-beam focused ion beam scanning electron microscope (FIB-SEM) system. To demonstrate the method, the samples were prepared from thin films of perovskite oxide BaSnO3 grown on a SrTiO3 substrate and metal oxide IrO2 on a TiO2 substrate, ranging from 20-80 nm in thicknesses using molecular beam epitaxy. While the method is optimized for the thin films, it can be extended to other site-specific plan-view samples and devices build on wafers. Aberration-corrected STEM was used to evaluate the quality of the samples and their applicability for atomic-resolution imaging and analysis.

First-principle study origin of ferromagnetism in non-magnetic perovskite BaSnO3 doped with 2p-X (X=C, N)

In this study, our goal is to analyze the origin of magnetization in non magnetic cubic structure perovskite BaSnO3 doped with 2p-X (X=C, N) using the full potential linearized augmented plane wave (FP-LAPW) method based on density functional theory (DFT). For the exchange and correlation potential we have applied the generalized gradient approximation (GGA) and the GGA plus-modified Becke-Johnson potential (mBJ-GGA). The results show that BaSnO3 doped with C then with N and finally with C and N exhibit half-metallic ferromagnetism behavior with the integer magnetic moment of 1, 2 and 3 μB per cell respectively. The origin of the ferromagnetism that occurs within these compounds is mainly caused by the p-p hybridization between 2p-impurities and its neighboring oxygen atoms. These results allowed to conclude that doped perovskite could provide a new type of materials, called half-metallic for future spintronic devices.

Enabling 2D Electron Gas with High Room-Temperature Electron Mobility Exceeding 100cm2 Vs-1 at a Perovskite Oxide Interface.

In perovskite oxide heterostructures, bulk functional properties coexist with emergent physical phenomena at epitaxial interfaces. Notably, charge transfer at the interface between two insulating oxide layers can lead to the formation of a 2D electron gas (2DEG) with possible applications in, e.g., high-electron-mobility transistors and ferroelectric field-effect transistors. So far, the realization of oxide 2DEGs is, however, largely limited to the interface between the single-crystal substrate and epitaxial film, preventing their deliberate placement inside a larger device architecture. Additionally, the substrate-limited quality of perovskite oxide interfaces hampers room-temperature (RT) 2DEG performance due to notoriously low electron mobility. In this work, the controlled creation of an interfacial 2DEG at the epitaxial interface between perovskite oxides BaSnO3 and LaInO3 is demonstrated with enhanced RT electron mobility values up to 119 cm2 Vs-1-the highest RT value reported so far for a perovskite oxide 2DEG. Using a combination of state-of-the-art deposition modes during oxide molecular beam epitaxy, this approach opens up another degree of freedom in optimization and in situ control of the interface between two epitaxial oxide layers away from the substrate interface. Thus this approach is expected to apply to the general class of perovskite oxide 2DEG systems and to enable their improved compatibility with novel device concepts and integration across materialsplatforms.

D-band center modulated water molecule adsorption and activation towards highly photocatalytic toluene mineralization

Photocatalysis is a promising strategy for deep purification of low-concentration toluene, driving by hydroxyl radicals (•OH) with potent oxidation capacity. Unfortunately, •OH evolution from H2O activation is a thermodynamically unfavorable process and suffers from the low utilization efficiency of photoexcited holes. Herein, a novel strategy to tailor the d-band center of perovskite BaSnO3 via heteroatom Zn substitution is proposed, aiming at optimizing the H2O adsorption configuration and efficiently activating H2O to yield •OH. The upshifted d‐band center mediated by the incorporation of Zn improves the adsorption capacity of H2O molecule, and directly determines the H2O adsorption configuration. Meanwhile, the dual transport channels of electron-hole accelerate O-H band fracture and lower the energy barrier for hole transfer to OH, allowing for efficient H2O activation. The optimized catalyst shows a 3-fold activity in toluene mineralization compared to commercial TiO2. This work sheds substantial light on H2O activation and environmental catalyst design.

Performance evaluation of inorganic Cs3Bi2I9-based perovskite solar cells with BaSnO3 charge transport layer

This research embedded with a novel idea of integration of perovskite material as charge transport layer corresponding to the perovskite absorber layer. The study explores the effectiveness of BaSnO3 perovskite material as an electron transport layer (ETL) in Cs3Bi2I9-based perovskite solar cells, using SCAPS-1D simulations. The research meticulously examines how structural and optical variations in each layer affect the device’s performance indicators, finding the thickness of the Cs3Bi2I9 layer and its defect concentration pivotal for optimal functionality. The highest photovoltaic efficiency, 20.62%, was achieved with an absorber layer thickness of 0.8 micrometers and acceptor and donor concentrations between 1E17 /cm3 and 1E18 /cm3, respectively. The absorber’s bulk defect density optimally ranged from 1E14 /cm3 to 1E15 /cm3. Interface defects between BaSnO3 and Cs3Bi2I9 layers significantly influenced performance, more so than those at the HTL (Cu2O) interface. The study also assesses thermal effects and series and shunt resistances, aiming to mitigate potential induced degradation (PID), a key concern for solar cell longevity and reliability. Nickel (Ni) was chosen as the back contact metal, balancing cost and efficiency. This research intends to clarify PID conditions to enhance the durability and consistent performance of photovoltaic systems.

Stable and efficient hydrogen evolution activity of tungsten-incorporated nanocrystalline perovskite BaSnO3 electrocatalyst

The increasing demand in energy consumption and alarming environmental concern is compelling to develop alternative renewable and clean energy sources. Hydrogen (H2) is identified as a potential candidate due to its abundance, high gravimetric energy density, and no carbon footprint. Presently, splitting of water is a highly promising method for sustainable hydrogen generation, and the key challenge is to develop a stable and high-performing electrocatalysts for H2 evolution reaction (HER) as a renewable energy source. Metal oxides are excellent alternative electrocatalysts to noble metals due to their cost effectiveness, tunability and abundance. Ternary perovskite barium stannate (BaSnO3) has been intensely explored for water splitting and electrocatalysis related applications. Tungsten (W) 1 % incorporated BaSnO3 synthesized by facile hydrogen peroxide route is explored as an electrocatalyst for HER activity in acidic medium for the first time. The pure and W-incorporated BaSnO3 exhibited promising HER activity with an overpotential value of 233 and 295 mV at 10 mA/cm2 with enhanced electrochemical surface area of 7.309 and 3.075 Fcm−2, respectively. A 12-hour stability test not only concluded the durability and performance of H2 evolution activity but also confirmed the enhanced initial current density for the W-incorporated BaSnO3 sample.

Comparative electronic structure, magnetic and optical properties of cubic perovskite BaXO3 (X=Ti, Sn) with self-defects: A first-principles calculation

In this work, a comparative analysis of the electronic structures and various optical properties of perovskite BaTiO3 and BaSnO3 with self-defects was estimated via DFT calculations. Although both materials are categorized as semiconductors, they exhibit significant differences in band gap values. BaTiO3 possesses a band gap of 1.75 eV, whereas BaSnO3 has a substantially lower band gap of only 0.43 eV. Despite both BaTiO3 and BaSnO3 being nonmagnetic materials, defects can lead to nonzero magnetic moments. For BaTiO3, oxygen vacancies and Ti interstitial strongly induce a magnetic moment of 0.35 μB/f.u. and 0.57 μB/f.u., respectively. In contrast, BaSnO3 shows large magnetic moments of 0.50 μB/f.u. for Ba and Sn interstitials and 0.47 μB/f.u. for O interstitial. We expected that our findings would promote the application of BaTiO3 and BaSnO3 materials not only as semiconductors but also as extensions for ferromagnetic semiconductor materials.

Photocatalytic and bacterial inhibition characteristics of reduced graphene oxide blended BaSnO3 perovskite

Photocatalytic and antibacterial properties of rGO blended BaSnO3 (rBS) perovskite synthesized by reducing graphene oxide using Moringa olifera leaf extract have been studied in this work and compared to those obtained from BaSnO3 (BS) produced by chemical precipitation. BS and rBS exhibited cubic structure with their crystallite sizes being equal to 43 and 37 nm, respectively. Disturbances in BaSnO3 crystal nucleation with rGO inclusion might have reduced the crystallite size of the rBS composite. The oxidation states of Ba, Sn and O in the rBS composite from XPS spectrum were found to be Ba2+, Sn2+ and O2–, respectively. Inclusion of rGO decreased BS's optical band gap from 3.12 eV to 3.0 eV. With rGO inclusion, the photodegradation efficiency of BS against CR dye increased from 78.3 % to 91 %. Due to increased ROS production with rGO blending, the rBS nanocomposite exhibited better antibacterial efficacy.

Ni doping induced property enhancement in laser ablated BaSnO3 films suitable for optoelectronic applications

Pulsed laser deposition is a straightforward approach for preparing films with superconducting to dielectric properties with atomic layer precision. The deep-seated mechanisms involved in the particle transport from target to substrate and subsequent film formation still need to be fully comprehended. This manuscript reports the property enhancement observed in laser ablated perovskite BaSnO3 films with Ni doping. Films' crystallinity improvement is observed, and an intensity enhancement of 1150% is observed on 3 mol% Ni-doping. The optimum Ni-doping concentration in BaSnO3 is found to be 3 mol%. Herein, Ni-doped BaSnO3 films deposited by PLD showed an unusual increase in film thickness (i.e., from 615 nm in the pure film to 1317 nm in the film with 7 mol% Ni-doping as revealed by lateral SEM analysis and spectroscopic ellipsometry). We propose an “Induced Magnetic field-assisted Particle Convergence (IMPC)” effect for this superficial growth enhancement. The film's optical properties are modified with an increased nickel doping level, and the bandgap energy shows renormalization. All the films show excellent transmittance (80–90%) in the Vis.-NIR region. Hall-effect measurement reveals the increased carrier concentration by three orders (2.98 × 1011 to 3.50 × 1014 cm−3). In addition, the enhancement in mobility from 3.13 to 20.93 cm2V−1s−1 and a decrease in electrical resistivity by six orders (i.e., from 4.05 × 109 to 1.13 × 103 Ω cm) are observed on 7 mol% Ni doping. XPS measurements reveals that the Ba, Sn and Ni ions are at 2+, 4+ and 2+ oxidation states. Using spectroscopic ellipsometric method, we estimated the optical constants of the films, the refractive index, dielectric constant, and extinction coefficient show a normal dispersion behavior. The high crystallinity, high transmittance, suitable surface topography, and improved electrical performances of the Ni-doped BaSnO3 films make them excellent candidates for optoelectronic devices and solar cells.

Defect-mediated time-efficient photocatalytic degradation of methylene blue and ciprofloxacin using tungsten-incorporated ternary perovskite BaSnO3 nanoparticles

Photocatalytic water purification has been extensively explored for its economic, eco-friendly, and sustainable aspects. In this study, tungsten (W) incorporated BaSn1-xWxO3 (x = 0 to 0.05) nanoparticles synthesized by facile hydrogen peroxide precipitation route has been demonstrated for photocatalytic degradation of methylene blue (MB) dye and ciprofloxacin (CIP) antibiotic. The structural analysis indicates the presence of hybrid composite-like nanostructures with reduced crystallinity. Optical studies reveal blueshift in bandgap and decrease in oxygen vacancy defects upon W-incorporation. Pure BaSnO3 shows overall enhanced photocatalytic activity towards MB (90.22%) and CIP (78.12%) after 240 min of white LED light and sunlight irradiation respectively. The 2 % W-incorporated BaSnO3 shows superior photocatalytic degradation of MB (26.89%) and CIP (45.14%) within first 30 min of irradiation confirming the presence of W to be beneficial in the process. The free radical study revealed the dominant role of reactive hole (h+) and oxygen radical (O2•−) species during photodegradation and their intermediates are investigated to elucidate the degradation mechanism of MB within 30 min of irradiation. This study is promising towards developing defect mediated and time-efficient photocatalysts for environmental remediation.

Perovskite stannate La-doped BaSnO3 films for near- and mid-infrared plasmonic applications

La-doped BaSnO3 (LBSO) epitaxial thin films were grown on (001) MgO substrates by pulsed laser deposition using a La0.04Ba0.96SnO3 target. The structural, electrical, and optical properties of the LBSO films were investigated as a function of oxygen pressure during deposition. The carrier mobility can be tuned from 13 cm2V−1s−1 to 44 cm2V−1s−1 by varying oxygen partial pressure from 2 Pa to 12 Pa, respectively. This improved mobility is attributed to the reduced film strain via reducing oxygen defect concentration or reducing off-stoichiometry in the film. The optical permittivity of LBSO films can also be modified as a function of the oxygen pressure during deposition, allowing tuning of their epsilon-near-zero wavelength from 1.9 µm to 5.6 µm. These results demonstrate that LBSO thin films grown on MgO can be used for plasmonic devices at mid-wave infrared wavelengths.

Perovskite BaSnO3 nanoparticles for solar-driven bi-functional photocatalytic activity: PEC water splitting and Wastewater treatment

The highly crystalline n-type BaSnO3 nanoparticles with size ∼30 nm, a larger surface area of ∼15.11 m2·g−1, and a wide optical band gap of 3.24 eV have been synthesized using a co-precipitation route for applications in photoelectrochemical water splitting and organic dye degradation. The spin-coated films of BSO nanoparticles photoanodes exhibited a photocurrent density of 20 μA·cm−2 at a forward bias potential of 0.6 V, a donor carrier density of 2.56 × 1018 cm−3 with a flat band potential of −0.82 V, and four-fold increment in the photocurrent density at a small bias voltage of 0.3 V, under AM 1.5 illumination (100 mW·cm−2). Pseudo-first-order kinetic study showed 96.49 and 95.38 % degradation performance of the Methylene Blue and Crystal Violet dyes at rate constant of 0.0128 and 0.0127 min−1, respectively, under constant irradiation for 240 min in the presence of BSO NPs, which is the highest degradation efficiency reported so far for BSO photocatalyst. The scavenger study revealed the significant role of h+ and ·OH− radicals in the degradation process. Liquid chromatography-mass spectroscopy provides intermediates obtained during the photocatalytic degradation of dyes. The present study focuses on the bifunctional photocatalytic performance of the BSO NPs as a potential candidate for PEC water splitting and wastewater treatment.

On the possibility of p-type doping in barium stannate

The combination of optical transparency and bipolar dopability in a single material would revolutionize modern opto-electronics. Of the materials known to be both p- and n-type dopable (such as SnO and CuInO2), none can satisfy the requirements for both p- and n-type transparent conducting applications. In the present work, perovskite BaSnO3 is investigated as a candidate material: its n-type properties are well characterized, with La-doping yielding degenerate conductivity and record electron mobility, while it has been suggested on a handful of occasions to be p-type dopable. Herein, group 1 metals Li, Na, and K and group 13 metals Al, Ga, and In are assessed as p-type acceptor defects in BaSnO3 using a hybrid density functional theory. It is found that while K and In can induce hole concentrations up to 1016 cm−3, the low energy oxygen vacancy pins the Fermi level in the bandgap and ultimately prevents metallic p-type conductivity being achieved in BaSnO3. Nevertheless, the predicted hole concentrations exceed experimentally reported values for K-doped BaSnO3, suggesting that the performance of a transparent p–n homo-junction made from this material could be significantly improved.

BaSn0.96-XZr0.04MXO3 (M = Mn, Fe or Co, x = 0, 0.02) for spin-based devices: Ferromagnetic properties

In this study, Zr and/or Mn, Fe or Co ions were used to induce a robust room temperature ferromagnetic nature in perovskite BaSnO3 for high performance information applications. Dilute magnetic semiconductor compositions with formula of BaSn0.96-XZr0.04MXO3 (M = Mn, Fe, Co, x = 0, 0.02) have been synthesized at 1150 °C. For all compositions, mono-phase of cubic BaSnO3 structure with very small impurities of SnO2 were recorded based on X-ray diffraction analysis. The relation between ionic size of dopants and crystal dimension of BaSnO3 suggests the of Sn4+-site by Zr4+, Mn2+, Fe2+ or Co2+ ions. Extended absorption tails to visible light region were found for BaSn0.94Zr0.04Mn0.02O3 and BaSn0.94Zr0.04Co0.02O3 samples, owing to strong defect band transition absorption. Due to the addition of Zr and/or Mn, Fe or Co ions high refine of BaSnO3 morphology from inhomogeneous large grains to well distribute small one were seen. The XPS results of BaSn0.96Zr0.04O3 and BaSn0.94Zr0.04Co0.02O3 samples confirm that Ba, Sn, O and Zr are in the oxidation states of +II, +IV, −II and +IV/+III, respectively. Magnetically, incorporation of 4 wt% Zr4+ ions (empty 4d-orbital) induced a full-saturated spin ferromagnetic order with saturation magnetization of 1.16 emu/g, retentivity of 0.11 emu/g and coercivity of 147 Oe. Also, codoping by Zr/Co ions stimulates a full-saturated spin ferromagnetic order with saturation magnetization of 1.36 emu/g, retentivity of 0.17 emu/g and coercivity of 149 Oe. The empty 4d-Zr4+ ions have high ability in reversing the diamagnetic nature of BaSnO3 to ferromagnetic one through interaction with oxygen vacancies. The outer 4d-shell of Zr and 3d-orbital of Co with the oxygen vacancies induce the strong magnetic exchange interaction. Through looking into the previous studies on the magnetic properties of BaSnO3, the recorded saturation magnetization of 4 wt% Zr and 4 wt% Zr + 2 wt% Co ions are remarkable values.

Hexagonal Boron Nitride Seed Layer-Assisted van der Waals Growth of BaSnO3 Perovskite Films.

We have succeeded in obtaining BaSnO3 perovskite thin films with remarkable near-infrared luminescence by van der Waals growth. The films were grown on quartz glass substrates by pulsed laser deposition using hexagonal boron nitride as the seed layer, and their crystallinity was confirmed by X-ray diffraction and cross-sectional transmission electron microscopy. The near-infrared emission of the grown film exhibited a broad emission peak centered at 920 nm. The transparency of the BaSnO3 film (thickness = 1000 nm)/ hexagonal boron nitride /double-sided optically polished quartz glass substrate was approximately 90% at approximately 500 nm with or without the BaSnO3 film. Films showing remarkable near-infrared emission and high transparency obtained by van der Waals-type growth could be used in practical wavelength conversion devices that improve the efficiency of Si single-crystal solar cells. The hexagonal boron nitride seed layer supporting the van der Waals growth is an effective method for high-quality crystal growth of films. It can be used for perovskite-type oxides with many functionalities.

Perovskite CuO@BaSnO3 nanorods photocatalysts with promoted visible light ability for desulfurization of thiophene

BackgroundThe desulfurization of fuels is critical to upgrade their performance and to match the demands of sulfur standards MethodMesoporous p-n heterojunctions CuO/BaSnO3 nanorods were fabricated by the hydrothermal process in the presence of polyvinylpyrrolidone. The photocatalytic performance of the synthesized CuO/BaSnO3 nanorods at various CuO percentages compared with the pristine BaSnO3 was evaluated by desulfurising thiophene under visible light illumination Significant findingsXRD and HRTEM results verified the fabrication of perovskite BaSnO3 in cubic structure and CuO in the monoclinic phase, and TEM images of CuO/BaSnO3 exhibited nanorod-like morphology with a length of 100 nm and width of 10 nm decorated with CuO NPs (5 nm). After optimization, the experimental results showed that with a photocatalyst dosage of 2 g/L and CuO percentage of 15%, the maximal desulfurization rate of thiophene was around 100% within 60 min. The rate constant of 15% CuO/BaSnO3 photocatalyst was the maximum, and it was enhanced larger 3.36 times than that of the pristine BaSnO3 nanorods. The photocurrent intensity of 15% CuO/BaSnO3 photocatalyst was enhanced 9.2 times greater than that of pristine BaSnO3. The enhancement of the desulfurization rate illustrated that the creation of an internal electric field through the p-n heterojunction CuO/BaSnO3 system could facilitate the separation of photoinduced holes and electrons, improving the charge transport ability and hence promoting the photocatalytic performance. PL, transient photocurrent responses and electrochemical impedance results were determined to confirm our photocatalytic results. Cycling runs displayed that the obtained CuO/BaSnO3 photocatalyst still exhibited high photocatalytic ability and stability after five cycles. This work is anticipated to strengthen the design of effective and novel p-n heterojunctions photocatalysts for practical photocatalysis applications in terms of H2 production and detoxification of toxic organic compounds.

Temperature-dependent dielectric measurements and structural properties of barium stannate (BaSnO3)

Cubic perovskite BaSnO3, synthesized by solid-state reaction method, was structurally characterized using temperature-dependent X-ray and Raman spectroscopy studies along with room temperature neutron diffraction analysis. Here, we report the effect of temperature on the structural parameters of BaSnO3 in correlation with dielectric properties. Sample homogeneity and elemental composition were studied by scanning electron microscopy and energy dispersive X-ray spectroscopy methods. The compound maintains cubic symmetry even at high temperatures and exhibits gradual increase in unit cell volume owing to thermal expansion. To understand high temperature phase transition, if any, and capacitance behavior, high temperature dielectric measurements were carried out. High value of dielectric constant was obtained at low frequencies as the temperature was increased, which may be due to the presence of oxygen vacancies or the lone-pair effect.

Enhanced photocatalytic efficiency of highly effective and stable perovskite BaSnO3 with monoclinic Li2MnO3 nanoparticles: Atrazine a case study of herbicide

Mesoporous Li2MnO3/BaSnO3 nanocomposites were constructed by sol-gel and impregnation approaches. The photocatalytic performance of Li2MnO3/BaSnO3 nanocomposites was assessed by Atrazine degradation as a probe herbicide molecule under visible light illumination. The optimum 15%Li2MnO3/BaSnO3 photocatalyst degraded the Atrazine completely (100%) after 50 min of illumination, which was enhanced two times larger than bare BaSnO3 NPs. The apparent rate constant of 15%Li2MnO3/BaSnO3 nanocomposite was about 3.11 times greater than bare BaSnO3 NPs. The results revealed that incorporating Li2MnO3 and BaSnO3 efficiently strengthened the separation of photoinduced carriers and extended the absorption of visible light. Due to the obtained nanocomposites having a porous structure, the Atrazine molecules are easily moved to the active sites with a large •OH radical concentration and reduced light scattering. The photocatalytic ability of Li2MnO3/BaSnO3 nanocomposite was a little minimized after five cycles of Atrazine degradation due to its high photocatalytic stability. The appropriate band bending of heterojunction Li2MnO3/BaSnO3 nanocomposite could be promoted the transport of photoinduced electrons toward the heterogeneous interface through the S-scheme mechanism, thus significantly prohibiting recombination and promoting the separation efficiency of carriers.

First-principles investigation of structural, electronic, and energetic properties of BaSnO3 (001) surfaces

Cubic perovskite oxide BaSnO3 has attracted increasing attention because of its exceptional optoelectronic properties and promising device applications. However, its composition of the most stable surface and relative thermodynamic stability of the different surface terminations remain controversial. Here we report a comprehensive computational and theoretical study of various (001) surface structures of BaSnO3 using first-principles electronic structure calculations. Our calculations show that the stoichiometric BaO surface termination has a slightly lower surface energy than SnO2 surface termination, although their values are comparable to each other and about one-half of the cleavage energy of BaSnO3. The calculated phase stability diagrams of the BaSnO3 (001) surface show that BaO surface termination is thermodynamically preferred to other surface terminations in the allowed range of BaSnO3 without forming secondary phases. Our calculations of cleavage energy reveal that eliminating the surface layer of BaO⋅H2O requires less energy compared to the surface layer of SnO2⋅H2O. These results explain the experimental findings why BaSnO3 films have a Ba-excess surface after oxygen annealing while SnO2 surface termination can only be achieved upon water leaching. This work may offer some guidelines for achieving precise control over the surface terminations of BaSnO3.

Hoisting photovoltaic performance of perovskite BaSnO3 nanoparticles wrapped reduced graphene oxide: Efficient photoelectrode for dye-sensitized solar cell

Inorganic perovskite nanostructure photoanode has a very important role in dye-sensitized solar cells (DSSC),in collecting photogenerated electrons coming from dye sensitizer. The photo-electric-conversion efficiency of photoelectrode is hindered by an effective photogenerated electron hole/pair. To avoid this problem, modification of BaSnO3 perovskite nanoparticles with graphene nanosheets is attempted in our work. Facile one-step synthesis of RGO loaded BaSnO3 (RGO-BaSnO3 NC) was done by simple solution route. As-prepared perovskite composite was studied using characterization techniques namely Raman spectroscopy, high-resolution transmission electron microscopy (HR-TEM) and field emission scanning electron microscopy (FE-SEM). The photovoltaic performances of RGO-BaSnO3 NC-based photoanode in DSSC employing N719 dye, Pt-counter electrode and imidazole-based liquid electrolyte have been studied under standard simulated lighting of 100 mW cm−2. It was found that RGO-BaSnO3 NC showed better dye adsorption to facilitate light harvesting and promoted a proficient electron transport pathway owing to fewer electron trapping sites on the surface than the pristine BaSnO3 NPs surface. The results demonstrate that the fabricated DSSC made with RGO-BNC-based photoanode delivered overall photoelectric conversion efficiency of 5.59 %, which is 32 % higher than that of DSSC fabricated unmodified BaSnO3 photoanode.