Date

Place

[P2-147]
14:00 ~ 15:30
Title:Hysteresis-Free Perovskite Solar Cells with Low-Temperature Processing
Jaewon Ha, Hoyeon Kim, Hyunwoo Lee (KAIST, Korea), Kyung-Geun Lim, Tae-Woo Lee (POSTECH, Korea), and Seunghyup Yoo (KAIST, Korea)
Abstract: Inorganic-organic lead halide perovskite photovoltaic (PV) technologies have recently attracted great interest as a promising low-cost renewable energy source. With the intense efforts devoted to this emerging PV technologies, their power conversion efficiency (PCE) has rapidly soared to a value comparable to those of established thin-film PV such as CIGS and CdTe. However, high-temperature processes are required for sintering of TiO2 layers, hindering them from being applied in flexible devices. In this work, we report on methylammonium lead iodide (MAPbI3) based perovskite PV cells?in which TiO2 layers are replaced with C60-based electron transport layer (ETL) that are thermally evaporated onto PEIE-coated ITO substrates. Experimental results show the proposed devices exhibit a resonable PCE over 10% with virtually no hysteresis problem. It is noteworthy that high temperature process is not requried for the proposed PVs because substrates are held almost at room temperature during deposition of C60 layers. For this reason, we believe the proposed device structure may open up an effective pathways towards highly efficient yet flexible PVs.?
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