Improved Performance of Inkjet Printed Perovskite Solar Cells by Spray Deposited SnO<sub>2</sub> Electron Transport Layer
발표자
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초록
내용
Among several approaches to develop high-performance inkjet printed (IJP) perovskite solar cells (PSCs), interface engineering is considered as a promising way for achieving high power conversion efficiency. Specifically, high optical transparency and excellent electrical properties are essential for optimized electron transport materials in PSCs. Herein, different approach employed to fabricate a tin oxide electron transport layer (ETL) at low temperature via solution process. The bilayer-SnO2 ETL exhibits improved surface morphology, reduced oxygen defects, and suitable band alignment with the IJP perovskite without losing the transmittance. The best PSC device based on a bilayer-SnO2 achieves the maximum power conversion efficiency of >16%. The improved device performance of the bilayer-SnO2-based IJP-PSC arises mainly from the better ohmic contact and suppressed recombination centers at the ETL/perovskite interface enabled the scalable fabrication of highly efficient IJP PSCs.