All-Ambient Processed Binary CsPbBr3-CsPb2Br5 Perovskites with Synergistic Enhancement for High-Efficiency Cs-Pb-Br-Based Solar Cells

doi:10.1021/acsami.7618902

	All-Ambient Processed Binary CsPbBr3-CsPb2Br5 Perovskites with Synergistic Enhancement for High-Efficiency Cs-Pb-Br-Based Solar Cells
	Zhang, Xisheng 2,3; Jin, Zhiwen 3; Zhan, Jingru 3; Bai, Dongliang 3; Bian, Hui 3; Wang, Kang 3; Sun, Jie 3; Wang, Qian 3; Liu, Shengzhong Frank 1,3,4
刊名	ACS APPLIED MATERIALS & INTERFACES
	2018-02-28
卷号	10 期号:8 页码:7145-7154
关键词	Cspbbr3-cspb2br5 Quantum Dots Perovskite Solar Cells Thiocyanate
ISSN号	1944-8244
DOI	10.1021/acsami.7618902
文献子类	Article
英文摘要	All-inorganic CsPbBr3 perovskite solar cells display outstanding stability toward moisture, light soaking, and thermal stressing, demonstrating great potential in tandem solar cells and toward commercialization. Unfortunately, it is still challenging to prepare high-performance CsPbBr3 films at moderate temperatures. Herein, a uniform, compact CsPbB(r)3 film was fabricated using its quantum dot (QD)-based ink precursor. The film was then treated using thiocyanate ethyl acetate (EA) solution in all-ambient conditions to produce a superior CsPbBr3-CsPb2Br5 composite film with a larger grain size and minimal defects. The achievement was attributed to the surface dissolution and recrystallization of the existing SCN- and EA. More specifically, the SCN- ions were first absorbed on the Pb atoms, leading to the dissolution and stripping of Cs+ and Br- ions from the CsPbBr3 QDs. On the other hand, the EA solution enhances the diffusion dynamics of surface atoms and the surfactant species. It is found that a small amount of CsPb2Br5 in the composite film gives the best surface passivation, while the Br-rich surface decreases Br vacancies (V-Br) for a prolonged carrier lifetime. As a result, the fabricated device gives a higher solar cell efficiency of 6.81% with an outstanding long-term stability.
WOS关键词	LIGHT-EMITTING-DIODES ; ELECTRON-TRANSPORT LAYER ; LEAD HALIDE PEROVSKITES ; QUANTUM DOTS ; PHOTOVOLTAIC PERFORMANCE ; CSPBX3 NANOCRYSTALS ; I NANOCRYSTALS ; CS4PBX6 X ; STABILITY ; CSPBBR3
WOS研究方向	Science & Technology - Other Topics ; Materials Science
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000426618000040
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/168930]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	Jin, Zhiwen; Wang, Qian; Liu, Shengzhong Frank
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China 2.Yuncheng Univ, Dept Phys & Elect Engn, Yuncheng 044000, Peoples R China 3.Shaanxi Normal Univ, Key Lab Appl Surface & Colloid Chem, Shaanxi Engn Lab Adv Energy Technol,Minist Educ, Shaanxi Key Lab Adv Energy Devices,Sch Mat Sci &, Xian 710119, Shaanxi, Peoples R China 4.Chinese Acad Sci, Dalian Inst Chem Phys, iChEM, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Xisheng,Jin, Zhiwen,Zhan, Jingru,et al. All-Ambient Processed Binary CsPbBr3-CsPb2Br5 Perovskites with Synergistic Enhancement for High-Efficiency Cs-Pb-Br-Based Solar Cells[J]. ACS APPLIED MATERIALS & INTERFACES,2018,10(8):7145-7154.
APA	Zhang, Xisheng.,Jin, Zhiwen.,Zhan, Jingru.,Bai, Dongliang.,Bian, Hui.,...&Liu, Shengzhong Frank.(2018).All-Ambient Processed Binary CsPbBr3-CsPb2Br5 Perovskites with Synergistic Enhancement for High-Efficiency Cs-Pb-Br-Based Solar Cells.ACS APPLIED MATERIALS & INTERFACES,10(8),7145-7154.
MLA	Zhang, Xisheng,et al."All-Ambient Processed Binary CsPbBr3-CsPb2Br5 Perovskites with Synergistic Enhancement for High-Efficiency Cs-Pb-Br-Based Solar Cells".ACS APPLIED MATERIALS & INTERFACES 10.8(2018):7145-7154.