Proceedings of the Korean Society of Marine Engineers Conference (한국마린엔지니어링학회:학술대회논문집)

The Korean Society of Marine Engineering (한국마린엔지니어링학회)
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Study of High-efficiency and Long-lived Blue - Green Light Emitting Diodes Using ZnSSe:Te System Grown by MBE

ZnSSe:Te계 청 -녹색 발광다이오드의 고효율화 및 장수명화에 관한 연구

  • 이홍찬 (Tottori University 대학원 전기전자공학과) ;
  • 이상태 (한국해양대학교 운항시스템공학부) ;
  • 이성근 (한국해양대학교 전기전자공학부) ;
  • 김윤식 (한국해양대학교 전기전자공학부)
  • Published : 2002.05.01
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Abstract

We have investigated the optical properties of Te-doped ZnSSe:Te epitaxial layers grown on (100) GaAs substrates by molecular beam epitaxy. The Te-doped ternary specimen shows strong blue or green emission (at 300k) which is assigned to Te$_{1}$ or Te$_{n}$( n$\geq$2) cluster bound exciton. Bright green and blue light-emitting diodes (LEDs) have been developed using ZnSSe:Te system as an active layer. The green LEDs exhibit a fairly long device lifetime (>2000 h) when operated at 3 A/cm$^{2}$ under CW condition at room temperature. It is confirmed that the Te-doping induced "crystal-hardening effect" plays a significant role in both efficient and strong suppression of the optical device degradation.gradation.

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