Efficient large guanidinium mixed perovskite solar cells with enhanced photovoltage and low energy losses

Shengfan WU; Zhen LI; Jie ZHANG; Tiantian LIU; Zonglong ZHU; Alex K.Y. JEN

doi:10.1039/c9cc00016j

Efficient large guanidinium mixed perovskite solar cells with enhanced photovoltage and low energy losses

Shengfan WU, Zhen LI, Jie ZHANG, Tiantian LIU, Zonglong ZHU^*, Alex K.Y. JEN

^*Corresponding author for this work

Research output: Journal Publications › Journal Article (refereed) › peer-review

126 Citations (Scopus)

Abstract

We present a strategy for suppressing the open-circuit voltage (V_oc) loss of perovskite solar cells by incorporating large guanidinium cations (Gua⁺) into a perovskite lattice, leading to a significantly improved V_oc of 1.19 V and an impressive power conversion efficiency of >21%. Our results manifest the critical role of Gua in passivating defects and highlight the importance of compositional engineering in promoting the performance of perovskites.

Original language	English
Pages (from-to)	4315-4318
Number of pages	4
Journal	Chemical Communications
Volume	55
Issue number	30
Early online date	19 Mar 2019
DOIs	https://doi.org/10.1039/c9cc00016j
Publication status	Published - 2019
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2019 The Royal Society of Chemistry.

Funding

The work was supported by the New Faculty Start-up Grant of the City University of Hong Kong (9610421, 7200587), Department of Energy SunShot (DE-EE 0006710) and the Office of Naval Research (N00014-17-1-2201).

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10.1039/c9cc00016j

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abstract = "We present a strategy for suppressing the open-circuit voltage (Voc) loss of perovskite solar cells by incorporating large guanidinium cations (Gua+) into a perovskite lattice, leading to a significantly improved Voc of 1.19 V and an impressive power conversion efficiency of >21%. Our results manifest the critical role of Gua in passivating defects and highlight the importance of compositional engineering in promoting the performance of perovskites.",

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AU - WU, Shengfan

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AU - ZHU, Zonglong

AU - JEN, Alex K.Y.

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AB - We present a strategy for suppressing the open-circuit voltage (Voc) loss of perovskite solar cells by incorporating large guanidinium cations (Gua+) into a perovskite lattice, leading to a significantly improved Voc of 1.19 V and an impressive power conversion efficiency of >21%. Our results manifest the critical role of Gua in passivating defects and highlight the importance of compositional engineering in promoting the performance of perovskites.

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DO - 10.1039/c9cc00016j

M3 - Journal Article (refereed)

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Efficient large guanidinium mixed perovskite solar cells with enhanced photovoltage and low energy losses

Abstract

Bibliographical note

Funding

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