Tuning the spectrometric properties of white light by surface plasmon effect using Ag nanoparticles in a colour converting light-emitting diode

被引：7

作者：

Chandramohan, S. ^{[1
]}

Ryu, Beo Deul ^{[1
]}

Uthirakumar, P. ^{[1
]}

Kang, Ji Hye ^{[1
]}

Kim, Hyun Kyu ^{[1
]}

Kim, Hyung Gu ^{[1
]}

Hong, Chang-Hee ^{[1
]}

机构：

[1] Chonbuk Natl Univ, Sch Semicond & Chem Engn, Semicond Phys Res Ctr, Chonju 561756, South Korea

来源：

SOLID-STATE ELECTRONICS | 2011年 / 57卷 / 01期

关键词：

InGaN/GaN light-emitting diode; Quantum dots; White light emission; Surface plasmon effect; QUANTUM DOTS; ENHANCEMENT; EFFICIENCY;

D O I：

10.1016/j.sse.2010.12.009

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We report on the spectral tunability of white light by localized surface plasmon (LSP) effect in a colour converting hybrid device made of CdSe/ZnS quantum dots (QDs) integrated on InGaN/GaN blue light-emitting diodes (LEDs). Silver (Ag) nanoparticles (NPs) are mixed with QDs for generating LSP effect. When the plasmon absorption of Ag NPs is synchronized to the QW emission at 448 nm, the NPs selectively absorb the blue light and subsequently enhance the QD emission. Using this energy transfer scheme, the (x, y) chromaticity coordinates of the hybrid white LED was tuned from (0.32, 0.17) to (0.43, 0.26), and thereby generated warm white light emission with correlated colour temperature (CCT) around 1800 K. Moreover, a 47% enhancement in the external quantum efficiency (EQE) was realized. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：90 / 92

页数：3

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