Robust Interfacial Modifier for Efficient Perovskite Solar Cells: Reconstruction of Energy Alignment at Buried Interface by Self-Diffusion of Dopants

doi:10.1002/adfm.202204725

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	Robust Interfacial Modifier for Efficient Perovskite Solar Cells: Reconstruction of Energy Alignment at Buried Interface by Self-Diffusion of Dopants
	Wang, Lipeng 6,7; Xia, Jianxing 5; Yan, Zheng 4; Song, Peiquan 3; Zhen, Chao 7; Jiang, Xin 7; Shao, Guang 2; Qiu, Zeliang 1; Wei, Zhanhua 3; Qiu, Jianhang 7
刊名	ADVANCED FUNCTIONAL MATERIALS
	2022-06-22
页码	10
关键词	defect passivation energy level alignment interfacial modifications perovskite solar cells
ISSN号	1616-301X
DOI	10.1002/adfm.202204725
通讯作者	Xia, Jianxing(jianxing.xia@epfl.ch) ; Wei, Zhanhua(weizhanhua@hqu.edu.cn) ; Qiu, Jianhang(jhqiu@imr.ac.cn) ; Nazeeruddin, Mohammad Khaja(mdkhaja.nazeeruddin@epfl.ch)
英文摘要	The under-coordinated defects within perovskite and its relevant interfaces always attract and trap the free carriers via the electrostatic force, significantly limiting the charge extraction efficiency and the intrinsic stability of perovskite solar cells (PSCs). Herein, self-diffusion interfacial doping by using ionic potassium L-aspartate (PL-A) is first reported to restrain the carrier trap induced recombination via the reconstruction of energy level structure at SnO2/perovskite interface in conventional n-i-p structured PSCs. Experiments and theories are consistent with the PL-A anions that can remain at the SnO2 surface due to strong chemical adsorption. During the spin-coating of the perovskite film, the cations gradually diffuse into perovskite and endow an n-doping effect, which provides higher force and a better energy level alignment for the carrier transport. As a result, they obtained 23.74% power conversion efficiency for the PL-A modified small-area devices, with dramatically improved open-circuit voltage of 1.19 V. The corresponding large-area devices (1.05 cm(2)) achieved an efficiency of 22.23%. Furthermore, the modified devices exhibited negligible hysteresis and enhanced ambient air stability exceeding 1500 h.
资助项目	National Natural Science Foundation of China[51402308] ; Liaoning Province Natural Science Foundation[2021-MS-008] ; Young Talent Program of Shenyang National Laboratory for Materials Science[L2019F40] ; Sichuan Science and Technology Program[2020JDRC0090]
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
出版者	WILEY-V C H VERLAG GMBH
WOS记录号	WOS:000814397400001
资助机构	National Natural Science Foundation of China ; Liaoning Province Natural Science Foundation ; Young Talent Program of Shenyang National Laboratory for Materials Science ; Sichuan Science and Technology Program
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/174696]
专题	金属研究所_中国科学院金属研究所
通讯作者	Xia, Jianxing; Wei, Zhanhua; Qiu, Jianhang; Nazeeruddin, Mohammad Khaja
作者单位	1.Chengdu Univ Technol, Coll Mat & Chem & Chem Engn, Chengdu 610059, Peoples R China 2.Sun Yat Sen Univ, Sch Chem, Guangzhou 510006, Peoples R China 3.Huaqiao Univ, Coll Mat Sci & Engn, Inst Luminescent Mat & Informat Displays, Xiamen 361021, Peoples R China 4.Shenyang Aerosp Univ, Coll Energy & Environm, Shenyang 110136, Peoples R China 5.Ecole Polytech Fed Lausanne EPFL, Inst Chem Sci & Engn, CH-1951 Sion, Switzerland 6.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 7.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Wang, Lipeng,Xia, Jianxing,Yan, Zheng,et al. Robust Interfacial Modifier for Efficient Perovskite Solar Cells: Reconstruction of Energy Alignment at Buried Interface by Self-Diffusion of Dopants[J]. ADVANCED FUNCTIONAL MATERIALS,2022:10.
APA	Wang, Lipeng.,Xia, Jianxing.,Yan, Zheng.,Song, Peiquan.,Zhen, Chao.,...&Nazeeruddin, Mohammad Khaja.(2022).Robust Interfacial Modifier for Efficient Perovskite Solar Cells: Reconstruction of Energy Alignment at Buried Interface by Self-Diffusion of Dopants.ADVANCED FUNCTIONAL MATERIALS,10.
MLA	Wang, Lipeng,et al."Robust Interfacial Modifier for Efficient Perovskite Solar Cells: Reconstruction of Energy Alignment at Buried Interface by Self-Diffusion of Dopants".ADVANCED FUNCTIONAL MATERIALS (2022):10.