Hole Transport Layer Free Perovskite Light-Emitting Diodes With High-Brightness and Air-Stability Based on Solution-Processed CsPbBr(3)-Cs(4)PbBr(6) Composites Films.
Hole Transport Layer Free Perovskite Light-Emitting Diodes With High-Brightness and Air-Stability Based on Solution-Processed CsPbBr(3)-Cs(4)PbBr(6) Composites Films.
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基于溶液加工 CsPbBr3-Cs4PbBr6 复合薄膜的具有高亮度和空气稳定性的无空穴传输层钙钛矿发光二极管
DOI：
10.3389/fchem.2022.828322
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发表时间：
2022
影响因子：
5.5
通讯作者：
Wu Z
中科院分区：
文献类型：
--
作者：
Yuan F;Zhang M;Zhu C;Liu X;Zhao C;Dai J;Dong H;Jiao B;Lan X;Wu Z
近年来，钙钛矿型发光二极管(PeLED)因其高效率而引起了人们的广泛关注。然而，由于钙钛矿发光层对湿度和氧气的敏感性，通常在高纯氮气环境中制备，这增加了器件制备的成本和工艺的复杂性，严重阻碍了其在照明和显示应用中的商业化。本文以富CsBr的钙钛矿溶液为原料，采用简单的一步旋涂法制备了CsPbBr3-Cs4PbBr6双相全无机复合薄膜。与纯CsPbBr3薄膜相比，CsPbBr3-Cs4PbBr6复合薄膜具有更强的光致发光发射和更长的荧光寿命，并伴随着光致发光量子产率的提高(33%)。结果表明，无空穴传输层的绿光Ped器件的最大亮度为72,082 cd/m2，最大外量子效率约为2.45%。更重要的是，冠军装置在空中连续工作时表现出极好的稳定性，工作半衰期超过1,000分钟。CsPbBr3-Cs4PbBr6双相全无机复合薄膜在先进的发光应用领域显示出诱人的前景。
Recently, perovskite light-emitting diodes (PeLEDs) have drew widespread attention due to their high efficiencies. However, because of the sensitivity to moisture and oxygen, perovskite luminescent layers are usually prepared in high-purity nitrogen environment, which increases the cost and process complexity of device preparation and seriously hindrances its commercialization of PeLED in lighting and display application. Herein, dual-phase all-inorganic composite CsPbBr3-Cs4PbBr6 films are fabricated from CsBr-rich perovskite solutions by a simple one-step spin-coating method in the air with high humidity. Compared with the pure CsPbBr3 film, the composite CsPbBr3-Cs4PbBr6 film has much stronger photoluminescence emission and longer fluorescence lifetime, accompanied by increased photoluminescence quantum yield (33%). As a result, we obtained green PeLED devices without hole transport layer exhibiting a maximum brightness of 72,082 cd/m2 and a maximum external quantum efficiency of about 2.45%, respectively. More importantly, the champion device shows excellent stability with operational half-lifetime exceeding 1,000 min under continuous operation in the air. The dual-phase all-inorganic composite CsPbBr3-Cs4PbBr6 film shows attractive prospect for advanced light emission applications.
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Dual%20Passivation%20of%20Perovskite%20Defects%20for%20Light—Emitting%20Diodes%20with%20External%20Quantum%20Efficiency%20Exceeding%2020%
影响因子：
19
作者：
Fang, Zhibin;Chen, Wenjing;Xiao, Zhengguo
通讯作者：
Xiao, Zhengguo
影响因子：
16.6
作者：
Zhang L;Yang X;Jiang Q;Wang P;Yin Z;Zhang X;Tan H;Yang YM;Wei M;Sutherland BR;Sargent EH;You J
通讯作者：
You J
影响因子：
22
作者：
Saidaminov, Makhsud I.;Almutlaq, Jawaher;Bakr, Osman M.
通讯作者：
Bakr, Osman M.
影响因子：
29.4
作者：
Cho, Himchan;Kim, Young-Hoon;Lee, Tae-Woo
通讯作者：
Lee, Tae-Woo
影响因子：
5.5
作者：
Nasi, Lucia;Calestani, Davide;Mosca, Roberto
通讯作者：
Mosca, Roberto