Title: Non-doped solid-state white light-emitting electrochemical cells employing the microcavity effect
Authors: Lin, Guan-Rung
Chen, Hsiao-Fan
Shih, Hsien-Chang
Hsu, Jia-Hong
Chang, Yi
Chiu, Chih-Hung
Cheng, Chia-Yu
Yeh, Yun-Shivan
Su, Hai-Ching
Wong, Ken-Tsung
Institute of Lighting and Energy Photonics
Issue Date: 14-Mar-2015
Abstract: Solid-state white light-emitting electrochemical cells (LECs) have attracted research attention owing to their advantages of simple device structure, low operation voltage and compatibility with solution processes. In this work, we demonstrate a simple approach to obtain white electroluminescence (EL) from non-doped LECs based on a blue-emitting complex. With a relatively thicker emissive layer, red emission can be additionally enhanced by the microcavity effect when the recombination zone moves to appropriate positions. Hence, white EL can be harvested by combining blue emission from the complex and red emission from the microcavity effect. These non-doped white LECs show external quantum efficiencies and power efficiencies up to 5% and 12 lm W-1, respectively. These results show that efficient white EL can be obtained in simple non-doped LECs.
URI: http://dx.doi.org/10.1039/c4cp05380j
ISSN: 1463-9076
DOI: 10.1039/c4cp05380j
Volume: 17
Issue: 10
Begin Page: 6956
End Page: 6962
Appears in Collections:Articles