In Situ Tin(II) Complex Antisolvent Process Featuring Simultaneous Quasi-Core-Shell Structure and Heterojunction for Improving Efficiency and Stability of Low-Bandgap Perovskite Solar Cells

Li, Can1; Ma, Ruiman1; He, Xinjun1; Yang, Tingbin2; Zhou, Ziming3; Yang, Shuo4; Liang, Yongye2; Sun, Xiao Wei3; Wang, Jiannong4; Yan, Yanfa5; Choy, Wallace C. H.1

2020

10.1002/aenm.201903013

Advanced Energy Materials   影响因子和分区

16146840

1614-6840

Unlike Pb-based perovskites, it is still a challenge for realizing the targets of high performance and stability in mixed Pb–Sn perovskite solar cells owing to grain boundary traps and chemical changes in the perovskites. In this work, proposed is the approach of in-situ tin(II) inorganic complex antisolvent process for specifically tuning the perovskite nucleation and crystal growth process. Interestingly, uniquely formed is the quasi-core–shell structure of Pb–Sn perovskite–tin(II) complex as well as heterojunction perovskite structure at the same time for achieving the targets. The core–shell structure of Pb–Sn perovskite crystals covered by a tin(II) complex at the grain boundaries effectively passivates the trap states and suppresses the nonradiative recombination, leading to longer carrier lifetime. Equally important, the perovskite heterostructure is intentionally formed at the perovskite top region for enhancing the carrier extraction. As a result, the mixed Pb–Sn low-bandgap perovskite device achieves a high power conversion efficiency up to 19.03% with fill factor over 0.8, which is among the highest fill factor in high-performance Pb–Sn perovskite solar cells. Remarkably, the device fail time under continuous light illumination is extended by over 18.5-folds from 30 to 560 h, benefitting from the protection of the quasi-core–shell structure.
© 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

grain boundary passivation mixed Pb-Sn perovskite solar cells perovskite heterostructures quasi-core-shell structures

SCI ; EI

英语

其他

[17201819] ; [201711159074]

Chemistry ; Energy & Fuels ; Materials Science ; Physics

Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000507569900001

Wiley-VCH Verlag

20200408071930

Binary alloys ; Carrier lifetime ; Chemical stability ; Crystal structure ; Efficiency ; Energy gap ; Grain boundaries ; Heterojunctions ; Lead alloys ; Perovskite ; Perovskite solar cells ; Shells (structures) ; Tin alloys

Structural Members and Shapes:408.2 ; Minerals:482.2 ; Lead and Alloys:546.1 ; Tin and Alloys:546.2 ; Electricity: Basic Concepts and Phenomena:701.1 ; Semiconductor Devices and Integrated Circuits:714.2 ; Chemistry:801 ; Production Engineering:913.1 ; Crystal Lattice:933.1.1

Web of Science

1.Department of Electrical and Electronic Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong; 999077, China
2.Shenzhen Key Laboratory of Printed Electronics, Department of Materials Science and Engineering, Southern University of Science and Technology of China, Shenzhen; 518055, China
3.Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen; 518055, China
4.Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong; 999077, China
5.Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, The University of Toledo, Toledo; OH; 43606, United States

Li, Can,Ma, Ruiman,He, Xinjun,et al. In Situ Tin(II) Complex Antisolvent Process Featuring Simultaneous Quasi-Core-Shell Structure and Heterojunction for Improving Efficiency and Stability of Low-Bandgap Perovskite Solar Cells[J]. Advanced Energy Materials,2020,10(8).

Li, Can.,Ma, Ruiman.,He, Xinjun.,Yang, Tingbin.,Zhou, Ziming.,...&Choy, Wallace C. H..(2020).In Situ Tin(II) Complex Antisolvent Process Featuring Simultaneous Quasi-Core–Shell Structure and Heterojunction for Improving Efficiency and Stability of Low-Bandgap Perovskite Solar Cells.Advanced Energy Materials,10(8).

Li, Can,et al."In Situ Tin(II) Complex Antisolvent Process Featuring Simultaneous Quasi-Core–Shell Structure and Heterojunction for Improving Efficiency and Stability of Low-Bandgap Perovskite Solar Cells".Advanced Energy Materials 10.8(2020).