Improved stability and efficiency of perovskite/organic tandem solar cells with an all-inorganic perovskite layer

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Detail(s)

Original languageEnglish
Journal / PublicationJournal of Materials Chemistry A
Online published18 Mar 2021
Publication statusOnline published - 18 Mar 2021

Abstract

All-inorganic perovskite solar cells (PVSCs) have attracted intensive attention owing to their tunable bandgaps and excellent photo- and thermostability, making them promising absorbers in tandem solar cells (TSCs). Herein, we develop an all-inorganic perovskite/organic TSC with a wide bandgap all-inorganic perovskite CsPbI2.1Br0.9 and a narrow bandgap organic photoactive layer (PM6:Y6) serving as top and bottom sub cells respectively. The fabricated tandem solar cell demonstrated a remarkable PCE of 18.06%, with an open-circuit voltage (VOC) of 1.89 V, short-circuit current (JSC) of 12.77 mA cm−2, and fill factor (FF) of 74.81%, which is higher than that of both single junction PVSCs (14.43%) and organic solar cells (14.01%). Moreover, benefiting from the outstanding UV and thermal stability of inorganic perovskites, all-inorganic perovskite-based tandem devices showed superior stability under light and heat, with negligible degradation after 150 h of UV irradiation, 250 h under one sun illumination and 100 h of heating at 80 °C. This work demonstrates that all-inorganic perovskites are an appropriate candidate for the fabrication of efficient and stable TSCs.

Citation Format(s)

Improved stability and efficiency of perovskite/organic tandem solar cells with an all-inorganic perovskite layer. / Wu, Xin; Liu, Yizhe; Qi, Feng; Lin, Francis; Fu, Huiting; Jiang, Kui; Wu, Shengfan; Bi, Leyu; Wang, Deng; Xu, Fang; Jen, Alex K. -Y.; Zhu, Zonglong.

In: Journal of Materials Chemistry A, 18.03.2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review