Correlation of energy disorder and open-circuit voltage in hybrid perovskite solar cells

Shao, Yuchuan; Yuan, Yongbo; Huang, Jinsong

doi:10.1038/nenergy.2015.1

Title: Correlation of energy disorder and open-circuit voltage in hybrid perovskite solar cells

Journal Article · Mon Jan 11 00:00:00 EST 2016 · Nature Energy

DOI:https://doi.org/10.1038/nenergy.2015.1· OSTI ID:1342748

Shao, Yuchuan ^[1]; Yuan, Yongbo ^[1]; Huang, Jinsong ^[1]

Univ. of Nebraska-Lincoln, Lincoln, NE (United States)

Organometal trihalide perovskites have been demonstrated as excellent light absorbers for high efficiency photovoltaic applications. Previous approaches to increasing the solar cell efficiency have focussed on optimisation of the grain morphology of perovskite thin films. Here, we show that the structural order of the electron-transport layers also has a significant impact on solar cell performance. We demonstrate that the power conversion efficiency of CH₃NH₃PbI₃ planar-heterojunction photovoltaic cells increases from 17.1% to 19.4% when the energy disorder in the fullerene electron-transport layer is reduced by a simple solvent annealing process. The increase in efficiency is the result of the enhancement in open-circuit voltage from 1.04 V to 1.13 V without sacrificing the short-circuit current and fill factor. Finally, these results shed light on the origin of open-circuit voltage in perovskite solar cells, and provide a new path to further increase their efficiency

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Research Organization:: Univ. of Nebraska, Lincoln, NE (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office

Grant/Contract Number:: EE0006709

OSTI ID:: 1342748

Journal Information:: Nature Energy, Vol. 1, Issue 1; ISSN 2058-7546

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 493 works

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