Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • Journal of Display Technology
  • Vol. 4,
  • Issue 1,
  • pp. 61-69
  • (2008)

Dual Partial Dye Doping for Chromaticity Tuning and Performance Enhancement of White OLEDs

Not Accessible

Your library or personal account may give you access

Abstract

In general, a guest dopant is doped into a single host matrix for white-light emission with two complementary colors. In this work, however, we have fabricated a white organic light-emitting diode (WOLED) based on dual partial dye doping in which a guest dopant is partially doped into two different host emitters; namely, orange-red emitting 4-(dicyanomethylene)-2-methyl-6-($p$-dimethylaminostyryl)-$4H$-pyran (DCM) is partially doped into both blue-emitting 4, $4^{\prime}$-bis(2,$2^{\prime}$-diphenylvinyl)-1,$1^{\prime}$-biphenyl (DPVBi) and green-emitting Tris-(8-hydroxyquinoline) aluminum $({\hbox{Alq}}_{3})$. We demonstrate that dual partial dye doping allows us to finely tune the Commission Internationale d'Eclairage (CIE) chromaticity coordinates to the equienergy white point $(x=0.33, y=0.33)$. In addition, it enhances device performance further, compared to WOLEDs based on DCM partially doped into a single host matrix (either DPVBi or ${\hbox{Alq}}_{3}$). Moreover, the dual partial doping scheme is shown to provide a way of suppressing the self-quenching effect (singlet-singlet annihilation). For a systematic study, we have implemented a comprehensive numerical model and performed simulations of the OLED structure, providing a clear understanding with regard to the underlying physics of OLEDs. We also carry out an investigation of the effects of key design parameters such as the doped layer position and thickness and dye concentration on the electroluminescence property of WOLEDs.

© 2007 IEEE

PDF Article
More Like This
Lighting object-based nondoped-type white organic light-emitting diode with N,N-diphenyl-N,N-bis(1-naphthyl)-(1,1-benzidine)-4,4-diamine as the chromaticity-tuning layer

Jianzhuo Zhu, Wenlian Li, Zisheng Su, Bei Chu, Liangliang Han, Dongfang Yang, Defeng Bi, Bin Li, Zhizhi Hu, Zhiqiang Zhang, and Taiju Tsuboi
Opt. Lett. 32(24) 3537-3539 (2007)

Study of color-conversion-materials in chromatic-stability white organic light-emitting diodes

C. Li, H. Kimura, T. Saito, K. Sakurai, B. Wei, M. Ichikawa, and Y. Taniguchi
Opt. Express 15(22) 14422-14430 (2007)

A highly color-stability white organic light-emitting diode by color conversion within hole injection layer

C. Li, M. Ichikawa, B. Wei, Y. Taniguchi, H. Kimura, K. Kawaguchi, and K. Sakurai
Opt. Express 15(2) 608-615 (2007)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved