Optical efficiency enhancement in white organic light-emitting diode display with high color gamut using patterned quantum dot film and long pass filter

Hyo Jun Kim, Min Ho Shin, Young-Joo Kim

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

A new structure for white organic light-emitting diode (OLED) displays with a patterned quantum dot (QD) film and a long pass filter (LPF) was proposed and evaluated to realize both a high color gamut and high optical efficiency. Since optical efficiency is a critical parameter in white OLED displays with a high color gamut, a red or green QD film as a color-converting component and an LPF as a light-recycling component are introduced to be adjusted via the characteristics of a color filter (CF). Compared with a conventional white OLED without both a QD film and the LPF, it was confirmed experimentally that the optical powers of red and green light in a new white OLED display were increased by 54.1 and 24.7% using a 30wt% red QD film and a 20wt% green QD film with the LPF, respectively. In addition, the white OLED with both a QD film and the LPF resulted in an increase in the color gamut from 98 to 107% (NTSC x; y ratio) due to the narrow emission linewidth of the QDs.

Original languageEnglish
Article number08RF01
JournalJapanese Journal of Applied Physics
Volume55
Issue number8
DOIs
Publication statusPublished - 2016 Aug 1

Fingerprint

Organic light emitting diodes (OLED)
Semiconductor quantum dots
light emitting diodes
Display devices
quantum dots
Color
color
filters
augmentation
recycling
Linewidth
Recycling

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

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abstract = "A new structure for white organic light-emitting diode (OLED) displays with a patterned quantum dot (QD) film and a long pass filter (LPF) was proposed and evaluated to realize both a high color gamut and high optical efficiency. Since optical efficiency is a critical parameter in white OLED displays with a high color gamut, a red or green QD film as a color-converting component and an LPF as a light-recycling component are introduced to be adjusted via the characteristics of a color filter (CF). Compared with a conventional white OLED without both a QD film and the LPF, it was confirmed experimentally that the optical powers of red and green light in a new white OLED display were increased by 54.1 and 24.7{\%} using a 30wt{\%} red QD film and a 20wt{\%} green QD film with the LPF, respectively. In addition, the white OLED with both a QD film and the LPF resulted in an increase in the color gamut from 98 to 107{\%} (NTSC x; y ratio) due to the narrow emission linewidth of the QDs.",
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