Abstract
In this study, we report a simple way to fabricate VOx thin film from pure-water solution, as the hole extraction layer (HEL) for perovskite hybrid solar cells (pero-HSCs). Furthermore, an aminopropanoic acid (APPA) interfacial layer is used to modify VOx thin film for reducing the charge carrier recombination rate. As a result, the pero-HSCs with the VOx/APPA HEL exhibits better device performance than that of the pero-HSCs with the VOx HEL and the pero-HSCs with poly(3,4-ethylenedioxythiophene):poly-(styrenesulfonate) HEL. Moreover, the pero-HSCs with the VOx/APPA HEL exhibits hysteresis-free characteristics. All these results indicate that we report a simple approach to realize high performance of perovskite hybrid solar cells.
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