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Heteroepitaxial passivation of Cs(2)AgBiBr(6) wafers with suppressed ionic migration for X-ray imaging

X-ray detectors are broadly utilized in medical imaging and product inspection. Halide perovskites recently demonstrate excellent performance for direct X-ray detection. However, ionic migration causes large noise and baseline drift, limiting the detection and imaging performance. Here we largely el...

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Autores principales: Yang, Bo, Pan, Weicheng, Wu, Haodi, Niu, Guangda, Yuan, Jun-Hui, Xue, Kan-Hao, Yin, Lixiao, Du, Xinyuan, Miao, Xiang-Shui, Yang, Xiaoquan, Xie, Qingguo, Tang, Jiang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6491557/
https://www.ncbi.nlm.nih.gov/pubmed/31040278
http://dx.doi.org/10.1038/s41467-019-09968-3
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author Yang, Bo
Pan, Weicheng
Wu, Haodi
Niu, Guangda
Yuan, Jun-Hui
Xue, Kan-Hao
Yin, Lixiao
Du, Xinyuan
Miao, Xiang-Shui
Yang, Xiaoquan
Xie, Qingguo
Tang, Jiang
author_facet Yang, Bo
Pan, Weicheng
Wu, Haodi
Niu, Guangda
Yuan, Jun-Hui
Xue, Kan-Hao
Yin, Lixiao
Du, Xinyuan
Miao, Xiang-Shui
Yang, Xiaoquan
Xie, Qingguo
Tang, Jiang
author_sort Yang, Bo
collection PubMed
description X-ray detectors are broadly utilized in medical imaging and product inspection. Halide perovskites recently demonstrate excellent performance for direct X-ray detection. However, ionic migration causes large noise and baseline drift, limiting the detection and imaging performance. Here we largely eliminate the ionic migration in cesium silver bismuth bromide (Cs(2)AgBiBr(6)) polycrystalline wafers by introducing bismuth oxybromide (BiOBr) as heteroepitaxial passivation layers. Good lattice match between BiOBr and Cs(2)AgBiBr(6) enables complete defect passivation and suppressed ionic migration. The detector hence achieves outstanding balanced performance with a signal drifting one order of magnitude lower than all previous studies, low noise (1/f noise free), a high sensitivity of 250 µC Gy (air)(−1) cm(–2), and a spatial resolution of 4.9 lp mm(−1). The wafer area could be easily scaled up by the isostatic-pressing method, together with the heteroepitaxial passivation, strengthens the competitiveness of Cs(2)AgBiBr(6)-based X-ray detectors as next-generation X-ray imaging flat panels.
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spelling pubmed-64915572019-05-02 Heteroepitaxial passivation of Cs(2)AgBiBr(6) wafers with suppressed ionic migration for X-ray imaging Yang, Bo Pan, Weicheng Wu, Haodi Niu, Guangda Yuan, Jun-Hui Xue, Kan-Hao Yin, Lixiao Du, Xinyuan Miao, Xiang-Shui Yang, Xiaoquan Xie, Qingguo Tang, Jiang Nat Commun Article X-ray detectors are broadly utilized in medical imaging and product inspection. Halide perovskites recently demonstrate excellent performance for direct X-ray detection. However, ionic migration causes large noise and baseline drift, limiting the detection and imaging performance. Here we largely eliminate the ionic migration in cesium silver bismuth bromide (Cs(2)AgBiBr(6)) polycrystalline wafers by introducing bismuth oxybromide (BiOBr) as heteroepitaxial passivation layers. Good lattice match between BiOBr and Cs(2)AgBiBr(6) enables complete defect passivation and suppressed ionic migration. The detector hence achieves outstanding balanced performance with a signal drifting one order of magnitude lower than all previous studies, low noise (1/f noise free), a high sensitivity of 250 µC Gy (air)(−1) cm(–2), and a spatial resolution of 4.9 lp mm(−1). The wafer area could be easily scaled up by the isostatic-pressing method, together with the heteroepitaxial passivation, strengthens the competitiveness of Cs(2)AgBiBr(6)-based X-ray detectors as next-generation X-ray imaging flat panels. Nature Publishing Group UK 2019-04-30 /pmc/articles/PMC6491557/ /pubmed/31040278 http://dx.doi.org/10.1038/s41467-019-09968-3 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Yang, Bo
Pan, Weicheng
Wu, Haodi
Niu, Guangda
Yuan, Jun-Hui
Xue, Kan-Hao
Yin, Lixiao
Du, Xinyuan
Miao, Xiang-Shui
Yang, Xiaoquan
Xie, Qingguo
Tang, Jiang
Heteroepitaxial passivation of Cs(2)AgBiBr(6) wafers with suppressed ionic migration for X-ray imaging
title Heteroepitaxial passivation of Cs(2)AgBiBr(6) wafers with suppressed ionic migration for X-ray imaging
title_full Heteroepitaxial passivation of Cs(2)AgBiBr(6) wafers with suppressed ionic migration for X-ray imaging
title_fullStr Heteroepitaxial passivation of Cs(2)AgBiBr(6) wafers with suppressed ionic migration for X-ray imaging
title_full_unstemmed Heteroepitaxial passivation of Cs(2)AgBiBr(6) wafers with suppressed ionic migration for X-ray imaging
title_short Heteroepitaxial passivation of Cs(2)AgBiBr(6) wafers with suppressed ionic migration for X-ray imaging
title_sort heteroepitaxial passivation of cs(2)agbibr(6) wafers with suppressed ionic migration for x-ray imaging
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6491557/
https://www.ncbi.nlm.nih.gov/pubmed/31040278
http://dx.doi.org/10.1038/s41467-019-09968-3
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