Abstract
In this research work, inverted organic solar cells (iOSCs) with the structure of ITO/ZnO /PTB7-Th: PC 70 BM/V 2 O 5 /Ag were investigated. Remarkable progress was achieved to fabricate efficient iOSCs using simple and low-cost spray pyrolysis (SP) technique to deposit a thin layer of ZnO as an Electron transporting layer (ETL). In addition, stability studies were performed for the fabricated devices. The stability study showed that the fabricated devices were possessed a low rate of degradation over time. Where the devices maintain 80 % of their initial efficiency over 5000 h. the key gain in this research was in combining the advantages of high stability along with high cell performance in addition to using mass production spray pyrolysis technique that might be a promising step for the commercialization of inverted organic solar cell.
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