CH3NH3PbI3/poly‐3‐hexylthiophen perovskite mesoscopic solar cells: Performance enhancement by Li‐assisted hole conduction |
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Authors: | Jin Hyuck Heo Sang Hyuk Im |
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Institution: | Department of Chemical Engineering, Kyung Hee University, , Gyeonggi‐do, 446‐701 Republic of Korea |
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Abstract: | To address if the non‐triphenylamine derivative hole transporting materials such as P3HT (poly‐3‐hexylthiophene) could also exhibit high device efficiency in mesoscopic MAPbI3 perovskite solar cells, we examined the effect of Li‐TFSI (Li‐bis(trifluoromethanesulfonyl) imide) and t‐BP (4‐tert‐butylpyridine) additives added in P3HT on device performance. Unlike the triphenylamine HTMs, the P3HT thiophene HTM without amine moiety was not doped by the additives but its conductivity was significantly improved by the Li‐TFSI/t‐BP mediated additional hole conduction. By inclusion of Li‐TFSI/t‐BP additive, we could fabricate more efficient mesoscopic MAPbI3 perovskite solar cells with smaller hysteresis with respect to scan direction due to Li mediated additional hole conduction. (© 2014 WILEY‐VCH Verlag GmbH &Co. KGaA, Weinheim) |
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Keywords: | CH3NH3PbI3 perovskites P3HT electrical conduction solar cells |
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