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Title: Long electron-hole diffusion length in high-quality lead-free double perovskite films
Authors: Ning, Weihua
Wang, Feng
Wu, Bo
Lu, Jun
Yan, Zhibo
Liu, Xianjie
Tao, Youtian
Liu, Jun-Ming
Huang, Wei
Fahlman, Mats
Hultman, Lars
Sum, Tze Chien
Gao, Feng
Keywords: Science::Physics
Issue Date: 2018
Source: Ning, W., Wang, F., Wu, B., Lu, J., Yan, Z., Liu, X., . . . Gao, F. (2018). Long electron-hole diffusion length in high-quality lead-free double perovskite films. Advanced Materials, 30(20), 1706246-. doi:10.1002/adma.201706246
Journal: Advanced Materials
Abstract: Developing environmentally friendly perovskites has become important in solving the toxicity issue of lead-based perovskite solar cells. Here, the first double perovskite (Cs2 AgBiBr6 ) solar cells using the planar structure are demonstrated. The prepared Cs2 AgBiBr6 films are composed of high-crystal-quality grains with diameters equal to the film thickness, thus minimizing the grain boundary length and the carrier recombination. These high-quality double perovskite films show long electron-hole diffusion lengths greater than 100 nm, enabling the fabrication of planar structure double perovskite solar cells. The resulting solar cells based on planar TiO2 exhibit an average power conversion efficiency over 1%. This work represents an important step forward toward the realization of environmentally friendly solar cells and also has important implications for the applications of double perovskites in other optoelectronic devices.
ISSN: 0935-9648
DOI: 10.1002/adma.201706246
Rights: © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved. This paper was published in Advanced Materials and is made available with permission of WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Fulltext Permission: none
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