中国物理B ›› 2018, Vol. 27 ›› Issue (8): 86101-086101.doi: 10.1088/1674-1056/27/8/086101

所属专题： SPECIAL TOPIC — Nanophotonics

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇    下一篇

Sputtered gold nanoparticles enhanced quantum dot light-emitting diodes

Abida Perveen, Xin Zhang(张欣), Jia-Lun Tang(汤加仑), Deng-Bao Han(韩登宝), Shuai Chang(常帅), Luo-Gen Deng(邓罗根), Wen-Yu Ji(纪文宇), Hai-Zheng Zhong(钟海政)   

  1. 1 Department of Physics, Beijing Institute of Technology, Beijing 100081, China;
    2 Department of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China;
    3 Department of Physics, Jilin University, Changchun 130023, China
  • 收稿日期:2017-12-30 修回日期:2018-01-16 出版日期:2018-08-05 发布日期:2018-08-05
  • 通讯作者: Shuai Chang, Hai-Zheng Zhong E-mail:schang@bit.edu.cn;hzzhong@bit.edu.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 21603012, 61735004, and 61722502).

Sputtered gold nanoparticles enhanced quantum dot light-emitting diodes

Abida Perveen1, Xin Zhang(张欣)2, Jia-Lun Tang(汤加仑)2, Deng-Bao Han(韩登宝)2, Shuai Chang(常帅)2, Luo-Gen Deng(邓罗根)1, Wen-Yu Ji(纪文宇)3, Hai-Zheng Zhong(钟海政)2   

  1. 1 Department of Physics, Beijing Institute of Technology, Beijing 100081, China;
    2 Department of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China;
    3 Department of Physics, Jilin University, Changchun 130023, China
  • Received:2017-12-30 Revised:2018-01-16 Online:2018-08-05 Published:2018-08-05
  • Contact: Shuai Chang, Hai-Zheng Zhong E-mail:schang@bit.edu.cn;hzzhong@bit.edu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 21603012, 61735004, and 61722502).

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摘要：

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).

关键词: gold nanoparticles, plasmonic effect, quantum dots, light-emitting diodes

Abstract:

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).

Key words: gold nanoparticles, plasmonic effect, quantum dots, light-emitting diodes

中图分类号:  (Structure of nanocrystals and nanoparticles ("colloidal" quantum dots but not gate-isolated embedded quantum dots))

  • 61.46.Df
73.20.Mf (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))