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An in situ cross-linked 1D/3D perovskite heterostructure improves the stability of hybrid perovskite solar cells for over 3000 h operation

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Abstract

Long-term stability is an essential requirement for perovskite solar cells (PSCs) to be commercially viable. Heterojunctions built by low-dimensional and three-dimensional perovskites (1D/3D or 2D/3D) help to improve the stability of PSCs. However, the insulated organic cations of low-dimensional perovskite impede the transport of carriers, decreasing the power conversion efficiency (PCE) of PSCs. Herein, we introduce an in situ cross-linking polymerizable propargylammonium (PA+) to the 3D perovskite film at surfaces and grain boundaries to form a 1D/3D perovskite heterostructure. This passivation strategy not only significantly improves the interfacial carrier transport but also releases residual tensile strain in perovskite films. As a result, the corresponding devices achieve a champion PCE of 21.19%, while maintaining 93% of their initial efficiency after 3055 h of continuous illumination under maximum power point (MPP) operating conditions.

Graphical abstract: An in situ cross-linked 1D/3D perovskite heterostructure improves the stability of hybrid perovskite solar cells for over 3000 h operation

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Article information


Submitted
30 May 2020
Accepted
24 Sep 2020
First published
28 Sep 2020

Energy Environ. Sci., 2020, Advance Article
Article type
Paper

An in situ cross-linked 1D/3D perovskite heterostructure improves the stability of hybrid perovskite solar cells for over 3000 h operation

N. Yang, C. Zhu, Y. Chen, H. Zai, C. Wang, X. Wang, H. Wang, S. Ma, Z. Gao, X. Wang, J. Hong, Y. Bai, H. Zhou, B. Cui and Q. Chen, Energy Environ. Sci., 2020, Advance Article , DOI: 10.1039/D0EE01736A

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