For hot hole collection in photoelectrochemical system, Au nanoprism/ p-GaN was fabricated. Although the efficiency of the incident photon to current efficiency was increased compared to Au nanoparticles/GaN that previously used, the efficiency of hot holes was still much lower than that of hot electrons. When light was given, it was confirmed that hydrogen evolution reaction increased with decreasing the size of Au nanoprisms. The physical and electrical characteristics of the photocathode were verified by using scanning electron microscope and atomic force microscope. Similar levels of dark and photocurrents in the photoelectrochemical system were obtained. Therefore, further study is needed to eliminate dark currents in order to measure the incident photon to current effciency more accurate.
광전기화학 환경내에서 핫정공의 포집을 위해 나노프리즘 모양의 금/ 질화갈륨 광전극을 제작되었다. 기존에 이용되었던 금 나노입자/ 질화갈륨에 비해 입사광자대 전류 변환 효율이 증가하였지만, 여전히 핫전자의 입사광자대 전류 변환 효율에 비해 많이 낮음을 측정하였다. 빛을 주었을 때, 수소 생성 반응이 나노프리즘의 크기가 감소함에 따라 증가함을 확인하였다. 주사전자현미경, 원자현미경을 통해 광전극의 물리적, 전기적 특성을 확인하였다. 광전기화학 환경에서 암전류와 광전류의 정도가 비슷함을 보았고 따라서 보다 정확한 입사광자대 전류 변환 효율 측정을 위해 암전류를 제거하는 연구가 필요함을 알 수 있다.
