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DOI	10.1016/j.cej.2021.128774
	Stable blue perovskite light-emitting diodes achieved by optimization of crystal dimension through zinc bromide addition
	Yan Z.-L.; Benas J.-S.; Chueh C.-C.; Chen W.-C.; Liang F.-C.; Zhang Z.-X.; Lin B.-H.; Su C.-J.; Chiba T.; Kido J.; Kuo C.-C.
发表日期	2021
ISSN	13858947
卷号	414
英文摘要	Low-dimensional perovskites have been widely studied as a promising candidate for realizing stable light-emitting diodes (LEDs). However, blue-light-emitting devices generally possess low stability associated with gradually red-shifted emission. To overcome this issue, the effect of zinc bromide (ZnBr2) addition on the regulation of the crystal structures of phenethylammonium and bromine-chlorine mixed inorganic perovskites (PEA-CsPbBrxCl3-x) is investigated. With the ZnBr2 addition, low-dimensional perovskite structures undergo morphological changes, such as thickening of their crystal structures and higher degree of crystal arrangement. Stoichiometric selective characterization reveals that perovskite bonding forces changed from Van der Waals with PEA to ionic with ZnBr2. Meanwhile, ZnBr2 can effectively address the ion defect filling and dimensional structure property switching. Consequently, the optimized ZnBr2-assisted PEA-CsPbBrxCl3-x LED is shown to deliver a high luminance of 1245 cd/m2 along with a high external quantum efficiency of 1.30%. Furthermore, this blue LED exhibits excellent spectral stability, for which only 3-nm red-shift on external excitation (0.1 to 5.0 mA) is observed. Our result clearly shows that ZnBr2 addition effectively improves the stability of blue light-emitting perovskites. © 2021 Elsevier B.V.
英文关键词	Blue light-emitting diodes; Crystal dimensional optimization; CsPbClxBr3-x perovskite; Zinc bromide
scopus关键词	Bromine compounds; Chlorine compounds; Crystals; Lead compounds; Light emitting diodes; Luminance; Perovskite; Red Shift; Van der Waals forces; Blue light-emitting; Dimensional structures; External excitation; External quantum efficiency; Morphological changes; Perovskite structures; Red-shifted emission; Spectral stability; Zinc compounds
来源期刊	Chemical Engineering Journal
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/177178
作者单位	Institute of Organic and Polymeric Materials, Research and Development Center of Smart Textile Technology, National Taipei University of Technology, Taipei, 10608, Taiwan; Research Center for Organic Materials and Frontier Center for Organic Materials, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan; Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan; National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu, 30076, Taiwan
推荐引用方式 GB/T 7714	Yan Z.-L.,Benas J.-S.,Chueh C.-C.,et al. Stable blue perovskite light-emitting diodes achieved by optimization of crystal dimension through zinc bromide addition[J],2021,414.
APA	Yan Z.-L..,Benas J.-S..,Chueh C.-C..,Chen W.-C..,Liang F.-C..,...&Kuo C.-C..(2021).Stable blue perovskite light-emitting diodes achieved by optimization of crystal dimension through zinc bromide addition.Chemical Engineering Journal,414.
MLA	Yan Z.-L.,et al."Stable blue perovskite light-emitting diodes achieved by optimization of crystal dimension through zinc bromide addition".Chemical Engineering Journal 414(2021).