Abstract

Four surface-modified and, hence, positively charged metal nanoparticles (NPs) of different localized surface plasmon (LSP) resonance wavelengths are synthesized for linking with negatively charged, red-emitting colloidal CdZnSeS/ZnS quantum dots (QDs) on the top surface of a blue-emitting InGaN/GaN quantum well (QW) light-emitting diode (LED) through electro-static force. The metal NP-QD linkage leads to a short distance between them for producing their strong surface plasmon (SP) coupling, such that QD absorption and emission can be enhanced. Meanwhile, the small $p\text{-}\mathrm{GaN}$ thickness in the LED results in strong SP coupling between the LSP resonance of metal NP and the QWs of the LED, leading to enhanced QW emission and, hence, stronger QD excitation. All those factors together result in the increase of the color conversion efficiency of the QD.

© 2019 Optical Society of America

Important role of surface plasmon coupling with the quantum wells in a surface plasmon enhanced color-converting structure of colloidal quantum dots on quantum wells

Yao-Tseng Wang, Ruei-Nan Wu, Chia-Chun Ni, Cai-Chen Lu, Cheng-Jin Cai, Wai Fong Tse, Wen-Yen Chang, Yang Kuo, Yean-Woei Kiang, and C. C. Yang
Opt. Express 28(9) 13352-13367 (2020)

Simulation study on light color conversion enhancement through surface plasmon coupling

Wen-Yen Chang, Yang Kuo, Yean-Woei Kiang, and C. C. Yang
Opt. Express 27(12) A629-A642 (2019)

Efficiency enhancement of light color conversion through surface plasmon coupling

Chun-Han Lin, Hsin-Chun Chiang, Yao-Tseng Wang, Yu-Feng Yao, Chi-Chung Chen, Wai Fong Tse, Ruei-Nan Wu, Wen-Yen Chang, Yang Kuo, Yean-Woei Kiang, and C. C. Yang
Opt. Express 26(18) 23629-23640 (2018)

Simultaneously improve the luminous efficiency and color-rendering index of GaN-based white-light-emitting diodes using metal localized surface plasmon resonance

Rongqiao Wan, Shuo Zhang, Zhiqiang Liu, Xiaoyan Yi, Liancheng Wang, Junxi Wang, Junhui Li, Wenhui Zhu, and Jinmin Li
Opt. Lett. 44(17) 4155-4158 (2019)

Nanoscale-cavity enhancement of color conversion with colloidal quantum dots embedded in the surface nano-holes of a blue-emitting light-emitting diode

Yang-Yi Huang, Zong-Han Li, Yi-Cheng Lai, Jun-Chen Chen, Shung-Hsiang Wu, Shaobo Yang, Yang Kuo, Chih-Chung Yang, Ta-Cheng Hsu, and Chi-Ling Lee
Opt. Express 30(17) 31322-31335 (2022)