Efficient All-Inorganic Perovskite Light-Emitting Diodes with Improved Operation Stability

doi:10.1021/acsami.9b23170

	Efficient All-Inorganic Perovskite Light-Emitting Diodes with Improved Operation Stability
	Cheng, Guoqing 1,3,4; Liu, Yan 1,4; Chen, Tao 1,3,4; Chen, Wenjing 1,4; Fang, Zhibin 1,4; Zhang, Ji 1,4; Ding, Liming 2; Li, Xinhua 3; Shi, Tongfei 3; Xiao, Zhengguo 1,4
刊名	ACS APPLIED MATERIALS & INTERFACES
	2020-04-15
卷号	12
关键词	inorganic perovskite light-emitting diodes nanocrystal external quantum efficiency operation stability
ISSN号	1944-8244
DOI	10.1021/acsami.9b23170
通讯作者	Shi, Tongfei(tfshi@issp.ac.cn) ; Xiao, Zhengguo(zhengguo@ustc.edu.cn)
英文摘要	Stability is becoming a main issue for perovskite light-emitting diodes (PeLEDs), as their external quantum efficiency (EQE) has been boosted to above 20%. An all-inorganic perovskite, cesium lead iodide (CsPbI3), has better stability than organic-inorganic hybrid perovskites but suffers from a transition to yellow delta-CsPbI3 phase at room temperature. Herein, we report stabilization of the alpha-CsPbI3 phase by in situ formation of perovskite nanocrystals (NCs). By incorporation of a proper ratio of bulky organoammonium halides, 4-fluoro-phenylmethylammonium iodide (4-F-PMAI), stable alpha-CsPbI3 films with nanometer-sized crystals can be obtained using a one-step spin-coating approach. The PeLEDs using alpha-CsPbI3 NC films as emitters show a pure red emission at 692 nm and a high EQE of 14.8%. The EQE is further boosted to 18.6% using CsPbI2.8Br0.2 as the emissive layer. Furthermore, the PeLEDs show a very decent half-lifetime of over 1200 min and a shelf stability of over 2 months, much longer than that of hybrid PeLEDs.
资助项目	National Natural Science Foundation of China[51872274] ; National Natural Science Foundation of China[51472247] ; National Natural Science Foundation of China[U1632123] ; Fundamental Research Funds for the Central Universities[WK2060190053]
WOS关键词	CESIUM LEAD IODIDE ; HALIDE PEROVSKITES ; PHASE ; STABILIZATION ; ALPHA-CSPBI3
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:000526330900097
资助机构	National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/103701]
专题	中国科学院合肥物质科学研究院
通讯作者	Shi, Tongfei; Xiao, Zhengguo
作者单位	1.Univ Sci & Technol China, Dept Phys, CAS Key Lab Strongly Coupled Quantum Matter Phys, Hefei 230026, Anhui, Peoples R China 2.Chinese Acad Sci, Key Lab Nanosyst & Hierarch Fabricat, Natl Ctr Nanosci & Technol, Ctr Excellence Nanosci, Beijing 100190, Peoples R China 3.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Anhui, Peoples R China 4.Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Cheng, Guoqing,Liu, Yan,Chen, Tao,et al. Efficient All-Inorganic Perovskite Light-Emitting Diodes with Improved Operation Stability[J]. ACS APPLIED MATERIALS & INTERFACES,2020,12.
APA	Cheng, Guoqing.,Liu, Yan.,Chen, Tao.,Chen, Wenjing.,Fang, Zhibin.,...&Xiao, Zhengguo.(2020).Efficient All-Inorganic Perovskite Light-Emitting Diodes with Improved Operation Stability.ACS APPLIED MATERIALS & INTERFACES,12.
MLA	Cheng, Guoqing,et al."Efficient All-Inorganic Perovskite Light-Emitting Diodes with Improved Operation Stability".ACS APPLIED MATERIALS & INTERFACES 12(2020).