Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
권호 표지

Electrical characteristics of RGB OLED

RGB OLED의 전기적 특성 분석

  • Yoo, Ji-Hong (School of Information and Communication Engineering, Sungkyunkwan University) ;
  • Han, Jay-Ho (School of Information and Communication Engineering, Sungkyunkwan University) ;
  • Choi, Byoung-Deog (School of Information and Communication Engineering, Sungkyunkwan University)
  • 유지홍 (성균관대학교 정보통신공학부) ;
  • 한재호 (성균관대학교 정보통신공학부) ;
  • 최병덕 (성균관대학교 정보통신공학부)
  • Published : 2009.06.18
Download PDF
⟨ Previous Next ⟩

Abstract

Electrical analysis of red, green and blue (RGB) organic light emitting diode (OLED), which were measured at various temperatures from 230K to 370K by steps of 20K, were investigated using current-voltage(I-V) characteristics. Ideality factor and series resistance were obtained from the thermionic emission theory. Experimental results showed that the ideality factors were 2.12 for red, 3.80 for green, and 6.03 for blue OLED at 290K, respectively. The series resistance were 1960, 2190, 2630$\Omega$ for red, green and blue OLED at the same temperature. It was found that the OLED ideality factors were much higher than near unity for well-behaved silicon diodes, because of the organic material and multi-layer fabrication diode. In addition, the series resistance was near 2k$\Omega$ range. More researches are required to reduce both ideality factors and series resistance to increase the efficiency of OLEDs.

Keywords