当前位置：
X-MOL 学术
›
Laser Photonics Rev.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Post-Passivation of Perovskite Quantum Dots by Conjugated Molecules for Spectrally Stable and Efficient Deep Blue Light-Emitting Diodes
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2023-07-27 , DOI: 10.1002/lpor.202300390 Chenyang Shen 1 , Yiyang Gan 1 , Shuai Zhang 1 , Weidong Qiu 1 , Jiayu Li 2 , Denghui Liu 1 , Guanwei Sun 1 , Zhe Liu 1 , Guo‐Xi Yang 1 , Xiaomei Peng 1 , Shiping Shi 1 , Ming‐De Li 2 , Shi‐Jian Su 1
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2023-07-27 , DOI: 10.1002/lpor.202300390 Chenyang Shen 1 , Yiyang Gan 1 , Shuai Zhang 1 , Weidong Qiu 1 , Jiayu Li 2 , Denghui Liu 1 , Guanwei Sun 1 , Zhe Liu 1 , Guo‐Xi Yang 1 , Xiaomei Peng 1 , Shiping Shi 1 , Ming‐De Li 2 , Shi‐Jian Su 1
Affiliation
|
Perovskite light-emitting diodes (PeLEDs) are promising candidates for displays and solid-state lighting due to their tunable colors, high conversion efficiency, and low cost. However, the performance of deep blue PeLEDs lags far behind that of near-infrared, red, and green ones. Here, the ligand concentration on the perovskite surface is regulated by introducing a small organic molecule 3-(5,9-dioxa-13b-boranaphtho [3,2,1-d,e] anthracene-7-yl)-9-phenyl-9H-carbazole (BOCzPh) to reduce the defects in the mixed-halogen perovskite lattice and improve the exciton binding energy of perovskite quantum dots (QDs). Finally, deep blue PeLEDs with an emission peak at 469 nm, a peak external quantum efficiency of 2.8%, and a maximum brightness of 851 cd m−2 are obtained. Owing to the post-passivation of QDs by BOCzPh molecules, the emission spectra of the mixed-halide perovskites are stabilized and the luminous efficiency of the devices is improved simultaneously. This work provides a new approach to realize spectrally stable and efficient deep blue PeLEDs.
中文翻译：
共轭分子对钙钛矿量子点进行后钝化，用于光谱稳定且高效的深蓝色发光二极管
钙钛矿发光二极管 (PeLED) 因其可调节的颜色、高转换效率和低成本而成为显示器和固态照明的有前途的候选者。然而，深蓝色PeLED的性能远远落后于近红外、红色和绿色PeLED。这里，通过引入有机小分子3-(5,9-二氧杂-13b-硼萘并[3,2,1-d,e]蒽-7-基)-9-苯基来调节钙钛矿表面的配体浓度-9H-咔唑（BOCzPh）可减少混合卤素钙钛矿晶格中的缺陷并提高钙钛矿量子点（QD）的激子结合能。最终获得发射峰为469 nm、峰值外量子效率为2.8%、最大亮度为851 cd m -2的深蓝色PeLED。由于BOCzPh分子对量子点进行后钝化，混合卤化物钙钛矿的发射光谱稳定，同时提高了器件的发光效率。这项工作提供了一种实现光谱稳定且高效的深蓝色 PeLED 的新方法。
更新日期：2023-07-27
中文翻译：
共轭分子对钙钛矿量子点进行后钝化，用于光谱稳定且高效的深蓝色发光二极管
钙钛矿发光二极管 (PeLED) 因其可调节的颜色、高转换效率和低成本而成为显示器和固态照明的有前途的候选者。然而，深蓝色PeLED的性能远远落后于近红外、红色和绿色PeLED。这里，通过引入有机小分子3-(5,9-二氧杂-13b-硼萘并[3,2,1-d,e]蒽-7-基)-9-苯基来调节钙钛矿表面的配体浓度-9H-咔唑（BOCzPh）可减少混合卤素钙钛矿晶格中的缺陷并提高钙钛矿量子点（QD）的激子结合能。最终获得发射峰为469 nm、峰值外量子效率为2.8%、最大亮度为851 cd m -2的深蓝色PeLED。由于BOCzPh分子对量子点进行后钝化，混合卤化物钙钛矿的发射光谱稳定，同时提高了器件的发光效率。这项工作提供了一种实现光谱稳定且高效的深蓝色 PeLED 的新方法。
京公网安备 11010802027423号