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Highly Stable Perovskite Solar Cells in Humid and Hot Environment

Abstract

An organic-inorganic perovskite solar cell (PSC) is a very promising candidate for a next-generation photovoltaic system. For the last 3 years, the power conversion efficiency (PCE) of PSCs has been dramatically improved from 9.7% to 22.1 %, however, a poor long-term stability still holds back the commercialization of PSCs. In this study, we explore the effect of poly(methyl methacrylate) (PMMA)/reduced graphene oxide (rGO) composite (PRC) passivation layer on the chemical and thermal stability of PSCs. The PRC passivation layer shows the superior protection performance, due to improved hydrophobicity and increased tortuosity of O2 or H2O diffusion path. Moreover, we observe that the excellent thermal conductivity of rGO facilitates heat dissipation through the PRC layer. When the PRC layer is coated, the aging of PSCs has been significantly prevented even at extreme conditions of humidity >75 % or temperature ~85 oC. Consequently, the PCE of PRC passivated PSCs exhibits a negligible change in air ambience, temperature 35 oC, and humidity 40 % for 1000 h. Our study offers a simple and robust way to fabricate long term stable and highly efficient PSCs, thus providing a path to the commercialization of PSCs.

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Publication details

The article was received on 05 May 2017, accepted on 05 Jun 2017 and first published on 05 Jun 2017


Article type: Paper
DOI: 10.1039/C7TA03881J
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    Highly Stable Perovskite Solar Cells in Humid and Hot Environment

    G. S. Han, J. S. Yoo, F. Yu, M. L. Duff, B. K. Kang and J. Lee, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA03881J

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