Perovskite Quantum Dots with Near Unity Solution and Neat-Film Photoluminescent Quantum Yield by Novel Spray Synthesis
Perovskite Quantum Dots with Near Unity Solution and Neat-Film Photoluminescent Quantum Yield by Novel Spray Synthesis
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DOI：
10.1002/adma.201705532
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发表时间：
2018-02-15
影响因子：
29.4
通讯作者：
Lin, Hao-Wu
中科院分区：
文献类型：
--
作者：
Dai, Shu-Wen;Hsu, Bo-Wei;Lin, Hao-Wu
本研究将传统的钙钛矿量子点合成方法与喷雾热分解技术相结合，发展了一种新型的钙钛矿量子点喷雾合成方法。通过利用这种新技术，证明了具有14 nm的均匀尺寸的X形钙钛矿量子点的合成，其显示出前所未有的稳定的绝对光致发光量子产率接近100%，在溶液中，甚至在固态纯膜中。高发射性薄膜与发光器件（LED）和有机发光显示器（OLED）集成。颜色转换型QD-LED（ccQD-LED）混合器件表现出非常饱和的绿色发射，优异的外量子效率为28.1%，功率效率为121 lm W-1，以及非凡的前向发光为8 500 000 cd m（-2）。概念性的ccQD-OLED混合显示屏还成功展示了高清静态图像和动态图像，拥有119%的国家电视系统委员会1931色域和123%的数字电影倡议-P3色域。这些非常稳定、超亮的钙钛矿量子点具有光电子学中各种有用应用所必需的特性。
In this study, a novel perovskite quantum dot (QD) spray-synthesis method is developed by combining traditional perovskite QD synthesis with the technique of spray pyrolysis. By utilizing this new technique, the synthesis of cubic-shaped perovskite QDs with a homogeneous size of 14 nm is demonstrated, which shows an unprecedented stable absolute photoluminescence quantum yield approximate to 100% in the solution and even in the solid-state neat film. The highly emissive thin films are integrated with light emission devices (LEDs) and organic light emission displays (OLEDs). The color conversion type QD-LED (ccQD-LED) hybrid devices exhibit an extremely saturated green emission, excellent external quantum efficiency of 28.1%, power efficiency of 121 lm W-1, and extraordinary forward-direction luminescence of 8 500 000 cd m(-2). The conceptual ccQD-OLED hybrid display also successfully demonstrates high-definition still images and moving pictures with a 119% National Television System Committee 1931 color gamut and 123% Digital Cinema Initiatives-P3 color gamut. These very-stable, ultra-bright perovskite QDs have the properties necessary for a variety of useful applications in optoelectronics.