Amide-modulated crystallization kinetics for high-performance pureblue perovskite LEDOA
Quasi-two-dimensional perovskites,with spectral tuning property,have opened up vast application prospects in the field of optoelectronic devices,especially in blue perovskite light-emitting diode(PeLED).However,relatively high density of defect states usually results in nonradiative recombination loss due to unexpected carriers capture at prolonged transport,which limits high-performance PeLED.Here,we propose a method for preparing pure-blue PeLED using bifunctional amide molecules to modulate crystallization kinetics.This strategy inhibits the formation of the n=1 phase and simultaneously passivates defects with the bifunctional groups,thereby reducing the occurrence of nonradiative recombination.The external quantum efficiency of the pure-blue PeLED fabricated using this strategy is significantly enhanced,reaching 9.7% at 478 nm,which is about 7 times higher than that of the control device.This work provides a novel strategy on the selection of bifunctional passivators for perovskites.
Zhiying Guo;Ruoyan Liu;Bei Zhou;Mohan Li;Zhijun Liu;Lanlan Zhai;Qian Miao;He Huang;Yun Yang;Guoku Chao;Haihong Wen;Jun Zou;Chao Zou
College of Chemistry and Materials Engineering,Wenzhou University,Wenzhou 325027,ChinaCollege of Chemistry and Materials Engineering,Wenzhou University,Wenzhou 325027,ChinaCollege of Chemistry and Materials Engineering,Wenzhou University,Wenzhou 325027,ChinaCollege of Chemistry and Materials Engineering,Wenzhou University,Wenzhou 325027,ChinaCollege of Chemistry and Materials Engineering,Wenzhou University,Wenzhou 325027,ChinaCollege of Chemistry and Materials Engineering,Wenzhou University,Wenzhou 325027,ChinaCollege of Chemistry and Materials Engineering,Wenzhou University,Wenzhou 325027,ChinaCollege of Chemistry and Materials Engineering,Wenzhou University,Wenzhou 325027,ChinaCollege of Chemistry and Materials Engineering,Wenzhou University,Wenzhou 325027,ChinaCollege of Chemistry and Materials Engineering,Wenzhou University,Wenzhou 325027,ChinaNational and Local Joint Engineering Research Centre of Ecological Treatment Technology for Urban Water Pollution,Wenzhou University,Wenzhou 325035,ChinaInstitute of New Materials&Industrial Technology,Wenzhou University,Wenzhou 325024,China School of Science,Shanghai Institute of Technology,Shanghai 201418,ChinaCollege of Chemistry and Materials Engineering,Wenzhou University,Wenzhou 325027,China
信息技术与安全科学
quasi-two-dimensional(2D)perovskitepure-blueperovskite light-emitting diode(PeLED)crystallization kinetics
《Nano Research》 2026 (1)
P.1126-1135,10
the Key R&D Program of Zhejiang Province(No.2024C01193)the National Natural Science Foundation of China(Nos.52171145 and 52102293)the Graduate Scientific Research Foundation of Wenzhou University.
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