Journal of the Semiconductor & Display Technology (반도체디스플레이기술학회지)

The Korean Society Of Semiconductor & Display Technology (한국반도체디스플레이기술학회)
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2-Wavelength Organic Light-Emitting Diodes by selectively doping of RP-411 in the Host of $Bebq_2$

$Bebq_2$ 호스트에 RP-411을 선택 도핑한 2-파장 유기발광 다이오드

  • Kim, Min-Young (Division of Internet Information, Baesokseok Culture University) ;
  • Jang, Ji-Geun (Department of Electronics, Dankook University)
  • 김민영 (백석문화대학 인터넷정보학부) ;
  • 장지근 (단국대학교 전자공학과)
  • Received : 2011.01.13
  • Accepted : 2011.02.28
  • Published : 2011.03.31
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Abstract

New organic light-emitting diodes with structure of ITO/DNTPD/TAPC/$Bebq_2/Bebq_2$:RP-411/ET-137/LiF/Al using the selective doping of 5% RP-411 in a single $Bebq_2$ host in the two wavelength(green, red) emitter formation were proposed and characterized. In the experiments, with a 300${\AA}$-thick undoped emitter of $Bebq_2$, three kinds of devices with different thicknesses of 30${\AA}$, 40${\AA}$ and 50${\AA}$ in the doped emitter of $Bebq_2$:RP-411 were fabricated. The electroluminescent spectra showed two peak emissions at the same wavelengths of 511 nm and 622 nm for the fabricated devices. When the device with a 30${\AA}$-thick doped emitter is referred as "D-1", the device with a 40${\AA}$-thick doped emitter is referred as "D-2" and the device with a 50${\AA}$-thick doped emitter is referred as "D-3", the relative intensity of 622 nm to 511 nm at two wavelength peaks was higher in the D-2 and the D-3 than in the D-1. The devices of D-1, D-2 and D-3 showed the color coordinates of (0.43, 0.46), (0.46, 0.44) and (0.48, 0.43) on the CIE chart, respectively.

Keywords

References

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