Redox-inactive samarium(III) acetylacetonate as dopant enabling cation substitution and interfacial passivation for efficient and stable CsPbI2Br perovskite solar cells

Redox-inactive samarium(III) acetylacetonate as dopant enabling cation substitution and interfacial passivation for efficient and stable CsPbI2Br perovskite solar cells

All-inorganic (CsPbX3) perovskites by replacing the volatile organic components with cesium cations allow extending the long-term thermal stability of perovskite solar cells (PeSCs) vs their organic–inorganic hybrid counterparts. However, the stability of α-CsPbI3 and α-CsPbI2Br still remains to be...

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Main Authors: Yang Yang, Dong-Wei Han, Ying Yang, Si-Wei Yi, Quan Yuan, Dong-Ying Zhou, Lai Feng
Format: Article
Language:English
Published: AIP Publishing LLC 2020-07-01
Series:APL Materials
Online Access:http://dx.doi.org/10.1063/5.0011918
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spelling doaj-570c2dc8efa347aa9614a61bc8dc85512020-11-25T03:52:53ZengAIP Publishing LLCAPL Materials2166-532X2020-07-0187071102071102-810.1063/5.0011918Redox-inactive samarium(III) acetylacetonate as dopant enabling cation substitution and interfacial passivation for efficient and stable CsPbI2Br perovskite solar cellsYang Yang0Dong-Wei Han1Ying Yang2Si-Wei Yi3Quan Yuan4Dong-Ying Zhou5Lai Feng6College of Energy, Soochow Institute for Energy and Materials InnovationS (SIEMIS), Soochow University, Suzhou 215006, ChinaCollege of Energy, Soochow Institute for Energy and Materials InnovationS (SIEMIS), Soochow University, Suzhou 215006, ChinaCollege of Energy, Soochow Institute for Energy and Materials InnovationS (SIEMIS), Soochow University, Suzhou 215006, ChinaCollege of Energy, Soochow Institute for Energy and Materials InnovationS (SIEMIS), Soochow University, Suzhou 215006, ChinaCollege of Energy, Soochow Institute for Energy and Materials InnovationS (SIEMIS), Soochow University, Suzhou 215006, ChinaCollege of Energy, Soochow Institute for Energy and Materials InnovationS (SIEMIS), Soochow University, Suzhou 215006, ChinaCollege of Energy, Soochow Institute for Energy and Materials InnovationS (SIEMIS), Soochow University, Suzhou 215006, ChinaAll-inorganic (CsPbX3) perovskites by replacing the volatile organic components with cesium cations allow extending the long-term thermal stability of perovskite solar cells (PeSCs) vs their organic–inorganic hybrid counterparts. However, the stability of α-CsPbI3 and α-CsPbI2Br still remains to be improved. In this work, we incorporate redox-inactive samarium acetylacetonate [Sm(acac)3] into CsPbI2Br to fabricate CsPbI2Br perovskite thin films. It is evidenced that Sm3+ not only partially substitute the Pb2+ sites to yield slightly contracted perovskite lattice but also modulate the perovskite growth and passivate the NiOx/CsPbI2Br interface. As a result, CsPbI2Br PeSCs based on stoichiometric and optimal Sm(acac)3 doping (0.15 mol. %) of CsPbI2Br show excellent photovoltaic metrics with a champion power conversion efficiency (PCE) of 12.86%. Moreover, the CsPbI2Br PeSCs exhibit enhanced thermal stability upon incorporation of Sm(acac)3, which retains 90% of their original PCE under heating at 85 °C for 200 h.http://dx.doi.org/10.1063/5.0011918
collection DOAJ
language English
format Article
sources DOAJ
author Yang Yang
Dong-Wei Han
Ying Yang
Si-Wei Yi
Quan Yuan
Dong-Ying Zhou
Lai Feng
spellingShingle Yang Yang
Dong-Wei Han
Ying Yang
Si-Wei Yi
Quan Yuan
Dong-Ying Zhou
Lai Feng
Redox-inactive samarium(III) acetylacetonate as dopant enabling cation substitution and interfacial passivation for efficient and stable CsPbI2Br perovskite solar cells
APL Materials
author_facet Yang Yang
Dong-Wei Han
Ying Yang
Si-Wei Yi
Quan Yuan
Dong-Ying Zhou
Lai Feng
author_sort Yang Yang
title Redox-inactive samarium(III) acetylacetonate as dopant enabling cation substitution and interfacial passivation for efficient and stable CsPbI2Br perovskite solar cells
title_short Redox-inactive samarium(III) acetylacetonate as dopant enabling cation substitution and interfacial passivation for efficient and stable CsPbI2Br perovskite solar cells
title_full Redox-inactive samarium(III) acetylacetonate as dopant enabling cation substitution and interfacial passivation for efficient and stable CsPbI2Br perovskite solar cells
title_fullStr Redox-inactive samarium(III) acetylacetonate as dopant enabling cation substitution and interfacial passivation for efficient and stable CsPbI2Br perovskite solar cells
title_full_unstemmed Redox-inactive samarium(III) acetylacetonate as dopant enabling cation substitution and interfacial passivation for efficient and stable CsPbI2Br perovskite solar cells
title_sort redox-inactive samarium(iii) acetylacetonate as dopant enabling cation substitution and interfacial passivation for efficient and stable cspbi2br perovskite solar cells
publisher AIP Publishing LLC
series APL Materials
issn 2166-532X
publishDate 2020-07-01
description All-inorganic (CsPbX3) perovskites by replacing the volatile organic components with cesium cations allow extending the long-term thermal stability of perovskite solar cells (PeSCs) vs their organic–inorganic hybrid counterparts. However, the stability of α-CsPbI3 and α-CsPbI2Br still remains to be improved. In this work, we incorporate redox-inactive samarium acetylacetonate [Sm(acac)3] into CsPbI2Br to fabricate CsPbI2Br perovskite thin films. It is evidenced that Sm3+ not only partially substitute the Pb2+ sites to yield slightly contracted perovskite lattice but also modulate the perovskite growth and passivate the NiOx/CsPbI2Br interface. As a result, CsPbI2Br PeSCs based on stoichiometric and optimal Sm(acac)3 doping (0.15 mol. %) of CsPbI2Br show excellent photovoltaic metrics with a champion power conversion efficiency (PCE) of 12.86%. Moreover, the CsPbI2Br PeSCs exhibit enhanced thermal stability upon incorporation of Sm(acac)3, which retains 90% of their original PCE under heating at 85 °C for 200 h.
url http://dx.doi.org/10.1063/5.0011918
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AT dongweihan redoxinactivesamariumiiiacetylacetonateasdopantenablingcationsubstitutionandinterfacialpassivationforefficientandstablecspbi2brperovskitesolarcells
AT yingyang redoxinactivesamariumiiiacetylacetonateasdopantenablingcationsubstitutionandinterfacialpassivationforefficientandstablecspbi2brperovskitesolarcells
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AT quanyuan redoxinactivesamariumiiiacetylacetonateasdopantenablingcationsubstitutionandinterfacialpassivationforefficientandstablecspbi2brperovskitesolarcells
AT dongyingzhou redoxinactivesamariumiiiacetylacetonateasdopantenablingcationsubstitutionandinterfacialpassivationforefficientandstablecspbi2brperovskitesolarcells
AT laifeng redoxinactivesamariumiiiacetylacetonateasdopantenablingcationsubstitutionandinterfacialpassivationforefficientandstablecspbi2brperovskitesolarcells
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