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High-Efficiency Pure-Red Perovskite Quantum-Dot Light-Emitting Diodes
Nano Letters ( IF 9.6 ) Pub Date : 2022-10-17 , DOI: 10.1021/acs.nanolett.2c03062 Mingyuan Xie 1 , Jie Guo 2 , Xiaoyu Zhang 2 , Chenghao Bi 1 , Lin Zhang 1 , Zema Chu 3 , Weitao Zheng 2 , Jingbi You 3 , Jianjun Tian 1
Nano Letters ( IF 9.6 ) Pub Date : 2022-10-17 , DOI: 10.1021/acs.nanolett.2c03062 Mingyuan Xie 1 , Jie Guo 2 , Xiaoyu Zhang 2 , Chenghao Bi 1 , Lin Zhang 1 , Zema Chu 3 , Weitao Zheng 2 , Jingbi You 3 , Jianjun Tian 1
Affiliation
It is still challenging to achieve high-efficiency pure-red (620–650 nm wavelength) perovskite light-emitting diodes (PeLEDs). Herein, we report pure-red PeLEDs with Commission Internationale de l’Eclairage coordinates (0.703, 0.297) meeting the Rec. 2020, an external quantum efficiency of 20.8%, and a luminance of 3775 cd/m2. This design is based on the strong quantum confinement CsPbI3 quantum dots (QDs) capped by composite ligands of 3-phenyl-1-propylamine and tetrabutylammonium iodide. This strategy stabilized the structure of the strong-confined QDs and reduced the influence of the electric field-induced Stark effect on the PeLEDs. Furthermore, the exciton binding energy of the QDs was decreased by the composited ligands to suppress Auger recombination within the devices. Additionally, the valence-band maximum of the QDs was lifted to match the hole-transport layer, thus balancing charge injection in the PeLEDs. Our device also demonstrated a stable electroluminescence spectrum and a lifetime of 5.6 times longer than the control device.
中文翻译:
高效纯红钙钛矿量子点发光二极管
实现高效纯红色(620-650 nm 波长)钙钛矿发光二极管(PeLED)仍然具有挑战性。在这里,我们报告了具有国际照明委员会坐标(0.703,0.297)的纯红色 PeLED,符合 Rec。2020,外量子效率为20.8%,亮度为3775 cd/m 2。该设计基于强量子限制 CsPbI 3由 3-苯基-1-丙胺和四丁基碘化铵的复合配体封端的量子点 (QD)。该策略稳定了强约束量子点的结构,降低了电场诱导的斯塔克效应对 PeLED 的影响。此外,复合配体降低了量子点的激子结合能,以抑制器件内的俄歇复合。此外,QD 的价带最大值被提升以匹配空穴传输层,从而平衡了 PeLED 中的电荷注入。我们的设备还表现出稳定的电致发光光谱和比控制设备长 5.6 倍的寿命。
更新日期:2022-10-17
中文翻译:
高效纯红钙钛矿量子点发光二极管
实现高效纯红色(620-650 nm 波长)钙钛矿发光二极管(PeLED)仍然具有挑战性。在这里,我们报告了具有国际照明委员会坐标(0.703,0.297)的纯红色 PeLED,符合 Rec。2020,外量子效率为20.8%,亮度为3775 cd/m 2。该设计基于强量子限制 CsPbI 3由 3-苯基-1-丙胺和四丁基碘化铵的复合配体封端的量子点 (QD)。该策略稳定了强约束量子点的结构,降低了电场诱导的斯塔克效应对 PeLED 的影响。此外,复合配体降低了量子点的激子结合能,以抑制器件内的俄歇复合。此外,QD 的价带最大值被提升以匹配空穴传输层,从而平衡了 PeLED 中的电荷注入。我们的设备还表现出稳定的电致发光光谱和比控制设备长 5.6 倍的寿命。