Abstract
This work reports on incorporation of spectrally tuned gold/silica (Au/SiO2) core/shell nanospheres and nanorods into the inverted perovskite solar cells (PVSC). The band gap of hybrid lead halide iodide (CH3NH3PbI3) can be gradually increased by replacing iodide with increasing amounts of bromide, which can not only offer an appreciate solar radiation window for the surface plasmon resonance effect utilization, but also potentially result in a large open circuit voltage. The introduction of localized surface plasmons in CH3NH3PbI2.85Br0.15‐based photovoltaic system, which occur in response to electromagnetic radiation, has shown dramatic enhancement of exciton dissociation. The synchronized improvement in photovoltage and photocurrent leads to an inverted CH3NH3PbI2.85Br0.15 planar PVSC device with power conversion efficiency of 13.7%. The spectral response characterization, time resolved photoluminescence, and transient photovoltage decay measurements highlight the efficient and simple method for perovskite devices.
Highlights
(Au/SiO2) core/shell nanospheres and nanorods into the inverted perovskite solar cells (PVSC)
The synchronized improvement in photovoltage and photocurrent leads to an Perovskite devices will be certainly benefited from new materials and device configurations, and resolving some obstacles existing in the conventional cells, such as the current–voltage scan inverted CH3NH3PbI2.85Br0.15 planar PVSC device with power conversion efficiency of 13.7%
We report on an inverted CH3NH3PbI3−xBrxbased PVSC employing a hybrid interfacial layer of “compact NiOx/meso-Al2O3” in combination with nanostructured Au nanoparticles
Summary
The certified efficiency for perovskite solar cells transfer between NiO and charge transfer materials than (PVSC) is 20.1% and expected to improve further.[5] This suc- that of TiO2 has been revealed with scanning electrochemical cess is closely associated with the photoelectrical properties of microscopy.[21] Chen et al first reported the replacement of the specific light absorber, such as CH3NH3PbX3 (X = I, Br, PEDOT:PSS with a thin NiO hole selective layer, resulting in Cl), exhibiting an appropriate band gap, small exciton binding a PCE of 7.8%.[11] We applied a reactive magnetron sputtered energy, and long and balanced ambipolar charge transport.[6,7] NiO ultrathin layer to promote the efficiency up to 9.8%.[22]. By imbedding a thin layer of Au NRs in the active layer of the PVSCs, the PCE was improved by a maximum value of 13.7%, which is attributed to enhanced local electric field originate from SPR effect
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