کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6456857 | 1420653 | 2017 | 9 صفحه PDF | دانلود رایگان |
- Efficient hysteresis-free bifacial PSCs are obtained by using PEIE/Ag(11Â nm)/MoOx triple-layer cathode.
- The bifacial PCEs are 13.55% and 8.41%, 60% higher than that of Ag only device.
- 10Â nm MoOx optical coupling layer enhances the Ag transmittance and light absorption in PSCs.
- 10Â nm PEIE interlayer efficiently improves the electron extraction ability from PCBM to Ag.
Bifacial semi-transparent perovskite solar cells (PSCs) are highly attractive for improving the efficiency of tandem solar cells and extending bifacial photovoltaic applications. However, the further improvement of bifacial performance has always been limited by the semitransparent electrode. Here we report an efficient triple-layer cathode of polyethyleneimine ethoxylate/silver/molybdenum oxide (PEIE/Ag/MoOx) for hysteresis-free planar PSCs with an inverted device configuration. Firstly, the optimal thickness of Ag electrode (11Â nm) is achieved by theoretical calculation, and the fabricated PSC achieves the PCE of 8.04% at indium-tin-oxide (ITO) side and 5.24% at Ag film side. Then, by introducing the MoOx (10Â nm) optical coupling layer and PEIE (10Â nm) interfacial modifying layer, the resulted PSC shows an obviously increased PCEs of 13.55% (ITO side) and 8.41% (Ag side), which is 60% higher than that of Ag only PSCs. The optimized PSCs has a structure of Glass/ITO/Poly (3,4-ethylenedioxythiophene): poly(styrenesulfonate)/Methylammonium-Lead-Iodide (about 300Â nm)/Phenyl-C61-butyric-acid-methyl-ester/PEIE/Ag/MoOx. It is thought that the enhanced Ag film transmittance by high-refractive-index MoOx and electron extraction ability by low-work-function PEIE contribute to the improved cathode property and bifacial PSC performance. Moreover, when a back-reflector is employed, the PCE of device could be further improved to 14.50% (ITO side) and 11.37% (Ag side).
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Journal: Solar Energy Materials and Solar Cells - Volume 170, October 2017, Pages 278-286