Analysis of electrical parameters of p-i-n perovskites solar cells during passivation via N-doped graphene quantum dots

Decoupling the effects of defects on efficiency and stability through phosphonates in stable halide perovskite solar cells

Lead-free tin perovskite solar cells

Shallow Iodine Defects Accelerate the Degradation of α-Phase Formamidinium Perovskite

Influence of Charge Transport Layers on Capacitance Measured in Halide Perovskite Solar Cells

Single-crystal halide perovskites: Opportunities and challenges

Metal halide perovskite solar cells (PSCs) are of interest for high altitude and space applications due to their lightweight and versatile form factor. However, their resilience toward the particle spectrum encountered in space is still of concern. For space cells, the effect of these particles is condensed into an equivalent 1 MeV electron fluence. The effect of high doses of 1 MeV e‐beam radiation up to an accumulated fluence to 1016 e− cm−2 on methylammonium lead iodide perovskite thin films and solar cells is probed. By using substrate and encapsulation materials that are stable under the high energy e‐beam radiation, its net effect on the perovskite film and solar cells can be studied. The quartz substrate‐based PSCs are stable under the high doses of 1 MeV e‐beam irradiation. Time‐resolved microwave conductivity analysis on pristine and irradiated films indicates that there is a small reduction in the charge carrier diffusion length upon irradiation. Nevertheless, this diffusion length remains larger than the perovskite film thickness used in the solar cells, even for the highest accumulated fluence of 1016 e− cm−2. This demonstrates that PSCs are promising candidates for space applications.

Recent progress on all-inorganic metal halide perovskite solar cells

High-performance methylammonium-free ideal-band-gap perovskite solar cells

Study on the interface defects of eco-friendly perovskite solar cells

Heteroleptic Tin-Antimony Sulfoiodide for Stable and Lead-free Solar Cells

Abstract: Thickness of ETL (Electron transport layer) shows important role in term of stability and efficiency of perovskite solar cells. In this paper the numerical simulation and extensive modeling have been performed on perovskite solar cell using perovskite material such as methyl ammonium lead Iodide (MAPbI3, MA=CH3NH3) with the help of SCAPS tool. The electrical properties of the MAPbI3 material used as active layer, have been calculated for different parameter such as open-circuit voltage (Voc), fill factor (FF), the power conversion efficiency (PCE), and short-circuit current density (Jsc) respectively. Capacitance-frequency (C-f) and capacitance-voltage (C-V) characteristics have been calculated for CH3NH3PbI3 perovskite solar cell. The inorganic copper iodide (CuI) material perform as the hole transport layer (HTL) in simulated structure of the perovskite solar cell. The simulation result shows that increasing the thickness of ETL decreasing the efficiency of perovskite solar cell. Keywords: Perovskite solar cell, CH3NH3PbI3, CuI, Thickness, FF, Voc, Jsc, PCE, C-f and C-V Cite this Article Ravi Shankar Yadav, Major G.S. Tripathi, Bramha P. Pandey. Effect of ETL layer thickness on perovskite (CH3NH3PbI3) solar cell. Trends in Opto-Electro & Optical Communication. 2019; 9(1): 32–37p.

In recent years, in order to solve the increasingly serious energy and environmental problems, people have turned their attention to the development and utilization of new energy. Among various new energy technologies, photovoltaic solar cells are undoubtedly one of the most promising directions. Among many new types of solar cells, perovskite thin-film solar cells have attracted a lot of attention from many solar energy researchers because of their high photoelectric conversion efficiency. In perovskite solar cells, in addition to the active layer material affecting the photoelectric conversion efficiency of the device, the interface layers(hole transport layer and electron transport layer) between the active layer and the electrode are also key factors. Therefore, in the current material structure of perovskite cells, the interface layer material has become an important research field. In this study, the inorganic copper thiocyanate (CuSCN) film was prepared by gas-assisted spin coating method, which was used as the hole transport layer(HTL) of perovskite solar cell to replace the traditional polymer material PEDOT:PSS. The thickness, crystallization characteristics, interface structure, annealing temperature and photoelectric conversion efficiency of the perovskite solar cell will be carefully investigated in this study. The experimental results show that cuprous thiocyanate can effectively replace PEDOT: PSS as a hole transport layer in perovskite solar cells. The cell with the best photoelectric conversion efficiency has a J_(sc) of 21.4 mA/cm^2, a V_(oc) of 1.0 mV, and a photoelectric conversion efficiency of 15.1%.

The detailed modeling and mathematical simulation on perovskite solar cells have been performed with three various perovskite materials, such as “methyl ammonium lead trial halide (MAPbX 3 , MA= CH 3 NH 3 , X: I, Br, Cl)” with aid of solar cell capacitance simulator software (SCAPS) tools. The electrical possessions of MAPbX 3 material performed as “active layer” and measured different parameters such as “open-circuit voltage (V oc ), fill factor (FF), power conversion efficiency (PCE), and short-circuit current density (J sc ) respectively”. In the construction of the perovskite solar cell, cuprous oxide (Cu 2 O) material serves as “hole transport layer (HTL)”. The simulated results show that MAPbI 3 has better determined structural parameters (FF= 85.45, PCE= 28.69%, V oc = 1.20V, J sc = 27.84 mAcm -2 ) compared with MAPbBr 3 and MAPbCl 3 . All of the above measured parameter’s have been compared with other workers with existing experimental and reported values and show strong covenant with recorded values. Keywords: Perovskite solar cell, CH 3 NH 3 PbI 3 , CH 3 NH 3 PbBr 3 , CH 3 NH 3 PbCl 3 , Cu 2 O, FF, V oc , J sc , PCE Cite this Article Kedar Nath Yadav, Ravi Shankar Yadav, Rakesh Kumar Singh. Effect study of Cu2O in Perovskite (CH3NH3PbX3, X: I, Br, Cl) Solar Cell as Hole Transport Layer. Journal of Microelectronics and Solid State Devices . 2020; 7(1): 5–10p.

Nanoparticles made of metal sulfides as quantum dots (QDs) have been prepared as electron transporting, light harvesting, and/or stabilizing parts for solar cells to improve their photovoltaic performance and durability. (AgIn)xZn2(1-x)S2 with its band gap in the range from 1.8 eV to 2.2 eV [1,2] has attractive potentials as the light absorber and the fluorescent material [3-5]. It was also found that the annealing of (AgIn)xZn2(1-x)S2 film at 500 ˚C in air brought the improvement of charge mobilities up to around 6.0 cm2 V-1 s-1[1,6]. In this context, preparation and band gap tuning of (AgIn)xZn2(1-x)S2 QDs through mixing with ZnO or TiO2 as the electron transport layer for inorganic-organic hybrid solar cells or metal halide perovskite solar cells (PSCs) have been investigated. Monodispersed AgInS2 [viz. x = 0 in (AgIn)xZn2(1-x)S2] QDs with an average value of the diameter of 6.22 ± 0.79 nm were prepared according to the reported procedures [7]. The interplanar spacing of the QDs was 0.33 nm, which corresponds to (112) crystal planes of the tetragonal phase of AgInS2. Introduction of AgInS2 QDs into hybrid solar cells resulted in over doubled enhancement of the photocurrent generation from 400 nm to 450 nm and the improvement of power conversion efficiencies (PCEs) as twice as the device without AgInS2 QDs [8]. While PSCs have been attracting many researchers because of their outstanding photophysical properties for photovoltaic performance. Development of the electron (or hole) transport layer of planar PSCs is one of the most important keys to improve the photovoltaic performance and the stability. Accordingly, development of hole transport layers by using various conjugated polymers for PSCs have been reported [9]. TiO2 and TiO2 mixed with AgInS2 QDs as dual electron transport layers were also introduced in PSCs in order to improve the photovoltaic performance and the stability. To prepare a decent physical contact between the electron transport layer and the rough surface of fluorine doped tin oxide, convective deposition technique was adopted because it has previously been confirmed that this method is one of the effective solution-based coating methods to deposit some self-assembled monolayer of both micro- and nanoparticles [10]. It was found that the addition of AgInS2 into TiO2 reduced pinholes at the interspace of the grains of the TiO2, enhanced a rectification ratio of the planar PSCs and improved the efficiency of the electron extraction from the active layer of metal halide perovskite through the TiO2/TiO2:AgInS2 QDs electron transport layer. PCE of the device was increased from 16.3% to 17.5% by the TiO2/TiO2:AgInS2 QDs (1.6 mg mL-1) as dual electron transport layers. The device with the dual electron transport layers showed the improvement of the external quantum efficiency in the wavelength region from 300 nm to 750 nm as compared with that of the device with TiO2 single layer. This result probably caused by the enhancement of light harvesting by AgInS2 QDs and the enhancement of the charge transfer from the perovskite layer to the dual electron transport layers. The long-term stability of the PSCs with the dual electron transport layers was confirmed when 1.6 mg mL-1 of AgInS2 was added, which was followed by the encapsulation and improvement of the retained PCE after the storage of the device in air for 15 days from 11% to 34% was also observed. This result implies that the TiO2/TiO2:AgInS2 QDs as dual electron transport layers not only brought the improvement of photovoltaic performance but also the durability. [1] Akaki, Y.; Kurihara, S.; Shirahama, M.; Tsurugida, K.; Seto, S.; Kakeno, T.; Yoshino, K. J. Phys. Chem. Solids. 2005, 66, 1858-1861. [2] Liu, B.; Li, X.; Zhao, Q.; Ke, J.; Tadé, M.; Liu, S. Appl. Catal., B 2016, 185, 1-10. [3] Kim, J.-H.; Lee, K.-H.; Jo, D.-Y.; Lee, Y.; Hwang, J. Y.; Yang, H. Appl. Phys. Lett. 2014, 105, 133104. [4] Shen, T.; Bian, L.; Li, B.; Zheng, K.; Pullerits, T.; Tian, J. Appl. Phys. Lett. 2016, 108, 213901. [5] Jasieniak, J.; Califano, M.; Watkins, S. E. ACS Nano. 2011, 5, 5888-5902. [6] Akaki, Y.; Kurihara, S.; Shirahama, M.; Tsurugida, K.; Kakeno, T.; Yoshino, K. J Mater Sci: Mater Electron 2005, 16, 393-396. [7] Torimoto, T.; Adachi, T.; Okazaki, K.-i.; Sakuraoka, M.; Shibayama, T.; Ohtani, B.; Kudo, A.; Kuwabata, S. J. Am. Chem. Soc. 2007, 129, 12388-12389. [8] Kim, E.-M.; Ruankham, P.; Lee, J.-H.; Hachiya, K.; Sagawa, T. Jpn. J. Appl. Phys. 2016, 55, 02BF06. [9] Ruankham, P.; Sagawa, T. J Mater Sci: Mater Electron 2018, 29, 9058-9066. [10] Kaewprajak, A.; Kumnorkaew, P.; Sagawa, T. Org. Electron. 2018, 56, 16-26.

Advancing Perovskite Solar Cell Reliability for Extreme Space Environments