High Color Purity Lead-Free Perovskite Light-Emitting Diodes via Sn Stabilization
High Color Purity Lead-Free Perovskite Light-Emitting Diodes via Sn Stabilization
复制标题
通过锡稳定化实现高色纯度无铅钙钛矿发光二极管
DOI：
10.1002/advs.201903213
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发表时间：
2020-03-01
期刊：
影响因子：
15.1
通讯作者：
Sargent, Edward H.
中科院分区：
文献类型：
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作者：
Liang, Hongyan;Yuan, Fanglong;Sargent, Edward H.
基于钙钛矿的发光二极管（PeLED）现在正接近外量子效率（EQE）的上限;然而，它们的应用目前受到对铅的依赖和颜色纯度不足的限制。Rec.2020要求红色发光体的Commission Internationale de l 'Eclairage坐标为（0.708，0.292），但目前的钙钛矿器件仅达到（0.71，0.28）。在此，无铅PeLED被报道具有（0.706，0.294）的色坐标-在红色PeLED中报道的最高纯度。发射光谱的变化也被评估为温度和施加电势的函数，发现发射红移
Perovskite-based light-emitting diodes (PeLEDs) are now approaching the upper limits of external quantum efficiency (EQE); however, their application is currently limited by reliance on lead and by inadequate color purity. The Rec. 2020 requires Commission Internationale de l'Eclairage coordinates of (0.708, 0.292) for red emitters, but present-day perovskite devices only achieve (0.71, 0.28). Here, lead-free PeLEDs are reported with color coordinates of (0.706, 0.294)-the highest purity reported among red PeLEDs. The variation of the emission spectrum is also evaluated as a function of temperature and applied potential, finding that emission redshifts by