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Controlling the film structure by regulating 2D Ruddlesden-Popper perovskite formation enthalpy for efficient and stable tri-cation perovskite solar cells
Chao Liang1; K. M.Muhammed Salim,2; Pengwei Li3; Zhuo Wang4; Teck Ming Koh2; Hao Gu1; Bo Wu5; Junmin Xia1; Zhipeng Zhang1; Kaiyang Wang1; Tanghao Liu1; Qi Wei1; Sisi Wang1; Yuxin Tang1; Guosheng Shao4; Yanlin Song3; Nripan Mathews2; Guichuan Xing1
2020-12
Source PublicationJournal of Materials Chemistry A
ISSN2050-7488
Volume8Issue:12Pages:5874-5881
Other Abstract

The incorporation of bulky organic cations into metal-halide perovskites, forming 2D–3D heterojunctions, has dramatically improved the stability of perovskite solar cells (PSCs). Nevertheless, the power conversion efficiencies (PCEs) of these PSCs are typically sacrificed because the formed 2D structures possess larger dielectric confinement, wider bandgaps, higher exciton binding energies and lower charge-carrier mobilities than 3D perovskites. Here, we demonstrate that the environmental stability of PSCs could be significantly improved without sacrificing the efficiency by introducing hydrophobic polyfluorinated cations (CF3CF2CH2NH3 + , 5F-PA+ ) to metalhalide perovskites. Due to the large 2D perovskite formation enthalpy with polyfluorinated cations, the addition of such cations will form a protective layer at the grain boundaries of 3D perovskite rather than forming 2D perovskites. The resultant solar cells based on 5FPA0.05[Cs0.05(MA0.17FA0.83)0.95]0.95Pb(Br0.17I0.83)3 exhibit a substantially increased PCE of 22.86% compared with the control Cs0.05(MA0.17- FA0.83)0.95Pb(Br0.17I0.83)3 devices (20.69%). More importantly, the optimized devices could retain 80% of their original PCEs after >3000 h in the ambient environment with a 65  10% relative humidity, which is attributed to the hydrophobic fluorine moieties. This work provides new understanding of the enhancement of PSC stability by incorporating polyfluorinated cations

DOI10.1039/d0ta00525h
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaChemistry ; Energy & Fuels ; Materials Science
WOS SubjectChemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS IDWOS:000526703800006
PublisherROYAL SOC CHEMISTRY, THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND
Scopus ID2-s2.0-85082656149
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Cited Times [WOS]:12   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Corresponding AuthorNripan Mathews; Guichuan Xing
Affiliation1.Joint Key Laboratory of the Ministry of Education,Institute of Applied Physics and Materials Engineering,University of Macau,Avenida da Universidade,999078,Macao
2.Energy Research Institute @ NTU,Research Techno Plaza X-Frontier Block,Level 5, 50 Nanyang Drive,637553,Singapore
3.Key Laboratory of Green Printing,Institute of Chemistry,Chinese Academy of Sciences,Beijing Engineering Research Center of Nanomaterials for Green Printing Technology,Beijing National Laboratory for Molecular Sciences,Beijing,100190,China
4.State Ctr. for Intl. Cooperation on Designer Low-Carbon and Environmental Material (SCICDLCEM),School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China
5.Guangdong Provincial Key Laboratory of Optical Information Materials and Technology,Institute of Electronic Paper Displays,South China Academy of Advanced Optoelectronics,South China Normal University,Guangzhou,510006,China
First Author AffilicationINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Corresponding Author AffilicationINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Recommended Citation
GB/T 7714
Chao Liang,K. M.Muhammed Salim,,Pengwei Li,et al. Controlling the film structure by regulating 2D Ruddlesden-Popper perovskite formation enthalpy for efficient and stable tri-cation perovskite solar cells[J]. Journal of Materials Chemistry A,2020,8(12):5874-5881.
APA Chao Liang,K. M.Muhammed Salim,,Pengwei Li,Zhuo Wang,Teck Ming Koh,Hao Gu,Bo Wu,Junmin Xia,Zhipeng Zhang,Kaiyang Wang,Tanghao Liu,Qi Wei,Sisi Wang,Yuxin Tang,Guosheng Shao,Yanlin Song,Nripan Mathews,&Guichuan Xing.(2020).Controlling the film structure by regulating 2D Ruddlesden-Popper perovskite formation enthalpy for efficient and stable tri-cation perovskite solar cells.Journal of Materials Chemistry A,8(12),5874-5881.
MLA Chao Liang,et al."Controlling the film structure by regulating 2D Ruddlesden-Popper perovskite formation enthalpy for efficient and stable tri-cation perovskite solar cells".Journal of Materials Chemistry A 8.12(2020):5874-5881.
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