High-Performance Solar Cells Systems with ZnO+ Spiro-OMeTAD Perovskite- NiO layers

Achieving a suitable electron-transporting layer for balancing electron- hole numbers, and the accumulation of electrical charges at HTL/anode interface layer, remains a key challenge for perovskite-organic solar cells (PSC) application. Here, ZnO, NiO, and spiro- OMeTAD (SOT) as electron-transporting layers (ETLs)/ perovskite/ SOT as hole-transporting layers (HTLs) of PSC have been widely analyzed. To find better ETL- materials in PSCP systems for balancing the difference between electron- hole (e-h) diffusion distance, and acting as a hole barrier material for  reducing the recombination ratio  of e - h at the active layer, Al (cathode), ZnO/NiO+۱۰wt.% SOT as ETL, perovskite-SOT as the active layer, and SOT as HTL and anode layer of PSCP systems are investigated with the help of relevant spectroscopic techniques, home- set electrical systems, ABET Technologies, Sun ۲۰۰۰ solar simulator, and microscopic images. In the ETL layer, ZnO/۱۰% wt. of SOT with zero, ۲۵, ۵۰, ۷۵, and ۱۰۰ wt.% of NiO particles, shows that sample with ۷۵% NiO particles, with higher carrier mobility (۶۲.۵ cm۲/V.S), higher power conversion efficiency (PCE= ۸.۳%), higher fill factor (FF=۶۷%), lower hysteresis loop, and lower SS (۱.۳ mV/dec.) can be used as desirable ETL for the next PSCP systems.

کلیدواژه ها:

Electron transport layer (ETL) ، Perovskite solar cells ، Spiro-OMeTAD ، Carrier mobility ، Hysteresis loop