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

한국전기전자재료학회 (The Korean Institute of Electrical and Electronic Material Engineers)
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CdTe 나노입자를 이용한 EL구조 및 특성

Electroluminescence of CdTe nanoparticles

  • Kim, Jin-Hyong (Department of Electrical Engineering, Korea University) ;
  • Cho, Kyoung-Ah (Department of Electrical Engineering, Korea University) ;
  • Kim, Hyun-Suk (Department of Electrical Engineering, Korea University) ;
  • Lee, Joon-Woo (Department of Electrical Engineering, Korea University) ;
  • Park, Byoung-Jun (Department of Electrical Engineering, Korea University) ;
  • Kim, Sang-Sig (Department of Electrical Engineering, Korea University)
  • 발행 : 2004.07.05
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초록

CdTe nanoparticles were synthesized in aqueous solution by colloidal method. The absorption and photoluminescence(PL) spectrum of the synthesized CdTe nanoparticles revealed the strong exitonic peak in the visible region. Electroluminescence of CdTe nanoparticles were observed in the structure of Al/CdTe/PVK/ITO and Al/CdTe/PEDOT/ITO that were fabricated by spin coating of polyvinylcarvazole(PVK), poly(3,4-ethylenedioxythiophene(PEDOT) and CdTe nanoparticles. The turn-on voltages of Al/CdTe/PVK/ITO and Al/CdTe/PEDOT/ITO for electroluminescence were 5V and 6V, respectively. We identified that the reduction of turn-on voltage resulted from the increase of hole injection into the hole transport layer due to lower ionization energy of PEDOT.

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