High efficient OLED displays prepared with the air-gapped bridges on quantum dot patterns for optical recycling

Hyo Jun Kim, Min Ho Shin, Joo Suc Kim, Se Eun Kim, Young Joo Kim

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

An optically efficient structure was proposed and fabricated to realize high brightness organic light emitting diode (OLED) displays based on a white OLED prepared with the air-gapped bridges on the quantum dot (QD) patterns. Compared with a conventional white OLED display, in our experiments, the optical intensity of the proposed OLED display shows the enhancement of 58.2% in the red color and 16.8% in the green color after applying the air-gapped bridge structure on QD patterns of 20 wt% concentration. This enhancement comes from the two facts that the QD patterns downconvert unnecessary blue or blue/green light to the required green or red light and the air-gapped bridges increase the color conversion efficiency of QDs by optical recycling using total internal reflection (TIR) at the interface. In addition, the color gamut of the proposed OLED display increases from 65.5 to 75.9% (NTSC x, y ratio) due to the narrow emission spectra of QDs.

Original languageEnglish
Article number43063
JournalScientific reports
Volume7
DOIs
Publication statusPublished - 2017 Feb 17

All Science Journal Classification (ASJC) codes

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