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학술발표회초록보기

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제109회 대한화학회 학술발표회, 총회 및 기기전시회 안내 p-InP Nanopillar Photocathodes for Highly Effcient Water Splitting

등록일
2012년 2월 24일 19시 13분 59초
접수번호
1497
발표코드
INOR1-5 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
목 11시 : 10분
발표형식
심포지엄
발표분야
무기화학 - Recent Advances in Inorganic/Material Science
저자 및
공동저자
이민형
경희대학교 응용화학과, Korea
The production of hydrogen from the photoelectrochemical (PEC) water splitting can provide abundant, renewable, clean source of energy for the future. Here,the photoelectrochemical evolution of hydrogen using p-InP nanopillar arrays decorated with metallic co-catalyst is explored. The nanopillar devices exhibit an great enhancement in the conversion efficiency, as compared to planar substrates. This behavior is mainly attributed to 1) the high current density by low surface reflectivity of nanopillar arrays along with the enhanced surface area for catalytic reaction and 2) the favorable positive shift in the onset potential by newly exposed orientation and surface modification during the reactive ion etching (RIE) process. Of particular importance to this architecture is the use of InP as the absorber layer, which is known to have a low carrier surface recombination velocity, thereby minimizing the loss of photogenerated carriers at the surfaces. Furthermore, TiO2 protection layers are applied by atomic layer deposition to suppress the photocorrosion.

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