Sputtered gold nanoparticles enhanced quantum dot light-emitting diodes
Sputtered gold nanoparticles enhanced quantum dot light-emitting diodes
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溅射金纳米颗粒增强量子点发光二极管
DOI：
10.1088/1674-1056/27/8/086101
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发表时间：
2018
影响因子：
1.7
通讯作者：
Zhong Hai-Zheng
中科院分区：
文献类型：
--
作者：
Perveen Abida;Zhang Xin;Tang Jia-Lun;Han Deng-Bao;Chang Shuai;Deng Luo-Gen;Ji Wen-Yu;Zhong Hai-Zheng
金属颗粒的表面等离子体效应是提高发光二极管性能的一种有效方法。在本工作中，我们报道了溅射的金纳米颗粒增强了倒置量子点发光二极管(ITO/Au纳米颗粒/锌镁/量子点/TFB/PEDOT：PSS/Al)的电致发光。结合时间分辨光致发光、瞬变电致发光和紫外光电子能谱测量，可以解释内场增强激子与表面等离子体耦合的增强以及电子注入速率随着金纳米粒子的掺入而增加。唯象数值计算表明，对于Au纳米颗粒修饰的器件，电子传输层的电子迁移率从1.39×10−5cm2/V⋅S增加到1.91×10−5cm2/V⋅S。结果表明，器件的最大发光强度提高了1.4 1倍(从14600 cd/cm2提高到20720 cd/cm2)，最大电流效率提高了1.2 9倍(从3.12cd/A提高到4.02cd/A)。
Surface plasmonic effects of metallic particles have been known to be an effective method to improve the performances of light emitting didoes. In this work, we report the sputtered Au nanoparticles enhanced electroluminescence in inverted quantum dot light emitting diodes (ITO/Au NPs/ZnMgO/QDs/TFB/PEDOT:PSS/Al). By combining the time-resolved photoluminescence, transient electroluminescence, and ultraviolet photoelectron spectrometer measurements, the enhancement of the internal field enhanced exciton coupling to surface plasmons and the electron injection rate increasing with Au nanoparticles’ incorporation can be explained. Phenomenological numerical calculations indicate that the electron mobility of the electron transport layer increases from 1.39 × 10−5 cm2/V⋅s to 1.91 × 10−5 cm2/V⋅s for Au NPs modified device. As a result, the maximum device luminescence is enhanced by 1.41 fold (from 14600 cd/cm2 to 20720 cd/cm2) and maximum current efficiency is improved by 1.29 fold (from 3.12 cd/A to 4.02 cd/A).