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Crystal Orientation Modulation and Defect Passivation for Efficient and Stable Methylammonium-Free Dion-Jacobson Quasi-2D Perovskite Solar Cells
Su, Pengyu2; Bai, Le1; Bi, Huan1; Liu, Baibai1; He, Dongmei1; Wang, Wenqi1; Cao, Xiaobing3; Chen, Shi4; Lee, Donghwa5; Yang, Hua6; Zang, Zhigang1; Chen, Jiangzhao1
2021-06-30
Source PublicationACS Applied Materials and Interfaces
ISSN1944-8244
Volume13Issue:25Pages:29567-29575
Abstract

Dion-Jacobson (DJ) quasi-2D perovskite solar cells (PSCs) have received increasing attention due to their greater potentials in realizing efficient and stable quasi-2D PSCs relative to their Ruddlesden-Popper counterpart. The substitution of methylammonium (MA+) with formamidinium is expected to be able to further increase the stability and power conversion efficiency (PCE) of DJ quasi-2D PSCs. Herein, we report a multifunctional additive strategy for preparing high-quality MA-free DJ quasi-2D perovskite films, where 1,1′-carbonyldi(1,2,4-triazole) (CDTA) molecules are incorporated into the perovskite precursor solution. CDTA modification can control phase distribution, enlarge grain size, modulate crystallinity and crystal orientation, and passivate defects. After CDTA modification, more favorable gradient phase distribution and accordingly gradient band alignment are formed, which is conducive to carrier transport and extraction. The improved crystal orientation can facilitate carrier transport and collection. The enlarged grain size and effective defect passivation contribute to reduced defect density. As a result, the CDTA-modified device delivers a PCE of 16.07%, which is one of the highest PCEs ever reported for MA-free DJ quasi-2D PSCs. The unencapsulated device with CDTA maintains 92% of its initial PCE after aging under one sun illumination for 360 h and 86% after aging at 60 °C for 360 h.

KeywordDefect Passivation Dion-jacobson Perovskite Methylammonium-free Orientation Modulation Perovskite Solar Cells
DOI10.1021/acsami.1c05498
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaScience & Technology - Other Topics ; Materials Science
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS IDWOS:000670430100031
Scopus ID2-s2.0-85110369206
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Cited Times [WOS]:13   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Corresponding AuthorCao, Xiaobing; Chen, Jiangzhao
Affiliation1.Key Laboratory of Optoelectronic Technology and Systems (Ministry of Education), College of Optoelectronic Engineering, Chongqing University, Chongqing, 400044, China
2.School of Electronic Information Engineering, Yangtze Normal University, Chongqing, 408100, China
3.School of Applied Physics and Materials, Wuyi University, Jiangmen, Guangdong, 529020, China
4.Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Taipa, Avenida da Universidade, 999078, Macao
5.Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea
6.Spallation Neutron Source Science Center, Institute of High Energy Physics, University of Chinese Academy of Sciences (CAS), Dongguan, 523803, China
Recommended Citation
GB/T 7714
Su, Pengyu,Bai, Le,Bi, Huan,et al. Crystal Orientation Modulation and Defect Passivation for Efficient and Stable Methylammonium-Free Dion-Jacobson Quasi-2D Perovskite Solar Cells[J]. ACS Applied Materials and Interfaces,2021,13(25):29567-29575.
APA Su, Pengyu,Bai, Le,Bi, Huan,Liu, Baibai,He, Dongmei,Wang, Wenqi,Cao, Xiaobing,Chen, Shi,Lee, Donghwa,Yang, Hua,Zang, Zhigang,&Chen, Jiangzhao.(2021).Crystal Orientation Modulation and Defect Passivation for Efficient and Stable Methylammonium-Free Dion-Jacobson Quasi-2D Perovskite Solar Cells.ACS Applied Materials and Interfaces,13(25),29567-29575.
MLA Su, Pengyu,et al."Crystal Orientation Modulation and Defect Passivation for Efficient and Stable Methylammonium-Free Dion-Jacobson Quasi-2D Perovskite Solar Cells".ACS Applied Materials and Interfaces 13.25(2021):29567-29575.
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