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Electrical and Optical Characteristics of White OLEDs with a Rubrene doped Layer

Rubrene 도핑층을 이용한 백색 OLEDs의 전기 및 광학적 특성

  • 문대규 (순천향대학교 신소재공학과) ;
  • 이찬재 (전자부품연구원 디스플레이센터) ;
  • 한정인 (전자부품연구원 디스플레이센터)
  • Published : 2007.01.01

Abstract

We have fabricated organic white light emitting diodes by mixing two colors from very thin rubrene doped and non-doped DPVBi layers. The device structure was ITO/2-TNATA(15 nm)/${\alpha}$-NPD(35 nm)/DPVBi:rubrene(5 nm)/DPVBi(30 nm)/$Alq_{3}(5\;nm)$/BCP(5 nm)/LiF(0.5 nm)/Al(150 nm). The yellow-emitting rubrene of 0.7 wt % was doped into the blue-emitting DPVBi host for the white light. CIE coordinate of the device was (0.31, 0.33) at 8 V. The color coordinates were stable at wide ranges of driving voltages. The luminance was over $1,000\;cd/m^{2}$ at 8 V and increases to $14,500\;cd/m^{2}$ at 12 V. The maximum current efficiency of the device was 8.2 cd/A at $200\;cd/m^{2}$.

Keywords

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