纳米晶
钙钛矿(结构)
发光二极管
卤化物
材料科学
光致发光
光电子学
亮度
量子产额
图层(电子)
铯
绿灯
电致发光
化学工程
纳米技术
无机化学
光学
化学
蓝光
荧光
工程类
物理
作者
Xiaoyu Zhang,Hong Lin,He Huang,Claas J. Reckmeier,Yù Zhang,Wallace C. H. Choy,Andrey L. Rogach
出处
期刊:Nano Letters
[American Chemical Society]
日期:2016-01-09
卷期号:16 (2): 1415-1420
被引量:702
标识
DOI:10.1021/acs.nanolett.5b04959
摘要
High photoluminescence quantum yield, easily tuned emission colors, and high color purity of perovskite nanocrystals make this class of material attractive for light source or display applications. Here, green light-emitting devices (LEDs) were fabricated using inorganic cesium lead halide perovskite nanocrystals as emitters. By introducing a thin film of perfluorinated ionomer (PFI) sandwiched between the hole transporting layer and perovskite emissive layer, the device hole injection efficiency has been significantly enhanced. At the same time, PFI layer suppressed charging of the perovskite nanocrystal emitters thus preserving their superior emissive properties, which led to the three-fold increase in peak brightness reaching 1377 cd m(-2). The full width at half-maximum of the symmetric emission peak with color coordinates of (0.09, 0.76) was 18 nm, the narrowest value among perovskite based green LEDs.
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