Journal of the Microelectronics and Packaging Society (마이크로전자및패키징학회지)

The Korean Microelectronics and Packaging Society (한국마이크로전자및패키징학회)
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Photoelectrochemical (PEC) Water Splitting using GaN-based Photoelectrode

GaN 기반 광전극을 이용한 광전기화학적 물분해 수소 생산

  • Heo, Jiwon (Department of Advanced Chemicals & Engineering, Chonnam National University) ;
  • Bae, Hyojung (Department of Advanced Chemicals & Engineering, Chonnam National University) ;
  • Ha, Jun-Seok (Department of Advanced Chemicals & Engineering, Chonnam National University)
  • 허지원 (전남대학교 화학공학부) ;
  • 배효정 (전남대학교 광전자융합기술연구소) ;
  • 하준석 (전남대학교 화학공학부)
  • Received : 2021.03.07
  • Accepted : 2021.03.30
  • Published : 2021.03.30
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Abstract

GaN has shown good potential owing to its better chemical stability than other materials and tunable bandgap with materials such as InN and AlN. Tunable bandgap allows GaN to make the maximum utilization of the solar spectrum, thus improves the solar-to-hydrogen (STH) efficiency. In addition, GaN band gap contains the oxidation and reduction level of water, so it can split water without external voltage. However, STH efficiency using GaN itself is low and has been actively studied recently to improve it. In this thesis, we have summarized the studies related to the use of GaN as a photoelectrode for photoelectrochemical water splitting.

GaN은 III-V족 화합물 반도체로 밴드갭을 조절하는 것이 가능하고 화학적으로 안정하기 때문에 다른 물질에 비해 산성, 염기성 용액에서 부식이 적다. 또한 GaN의 밴드갭이 물의 산화·환원 준위를 포함하고 있어 외부전압 없이 물 분해가 가능하다는 장점이 있다. 하지만 GaN 자체만으로는 태양광-수소 변환 효율(solar-to-hydrogen conversion efficiency, STH)이 낮아 이를 개선하기 위해 최근 활발한 연구가 이루어지고 있다. 본 총설에서는 GaN을 PEC 물분해의 광전극으로 사용하기 위한 방법들과 연구에 대해 정리하였다.

Keywords

References

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