上海科技大学知识管理系统

Perovskite solar cells (PSCs) have excellent photovoltaic properties. There are, however, challenges of materials cost and device stability to be solved before commercializing them. Utilizing low-cost inorganic hole transport materials (HTM) as a replacement for spiro-OMeTAD, and replacing the Au electrode with printable carbon could be important steps in this regard. For this purpose, CuInxGa1-xS2 (x = 1, 0.75, 0.5, 0.25, 0) nanoparticle layers are deposited as inorganic HTMs with carbon composite electrode as the back electrode. Photovoltaic properties of PSCs with CuInxGa1-xS2/Carbon hole collecting electrodes are studied by changing the In ratio in the HTM layer. Results from impedance spectroscopy show that by decreasing x value the charge transfer resistance at the interface of hole collector and perovskite layer decrease which matches the downward trend of fill factor of the corresponding cells. The efficiency of PSCs increases during the first week, while, on average, their efficiency drop after one month is less than 5% of the initial values. The best efficiency of 16.45% has been obtained for CuInxGa1-xS2/carbon hole collectors.