| 학회 |
한국재료학회 |
| 학술대회 |
2019년 봄 (05/15 ~ 05/17, 평창 알펜시아 리조트) |
| 권호 |
25권 1호 |
| 발표분야 |
특별심포지엄6. (광)전기화학적 수전해 및 이산화탄소 전환 기술 동향-오거나이저:안상현(중앙대) |
| 제목 |
Direct In situ Growth of Tri-layer Transition Metal Dichalcogenides Hetereostrcuture Catalyst For Photoelectrochemical Hydrogen Evolution |
| 초록 |
The in situ fabrication of multi-heterojunction transition metal dichalcogenides (multi-TMDs) has been significantly challenging using conventional deposition methods. In this study, we successfully fabricated vertically stacked centimeter-scale multi-TMD (MoS2/WS2/WSe2 and MoS2/WSe2) thin films using pulsed laser deposition (PLD). The fabricated trilayer MoS2/WS2/WSe2 heterostructure thin film on p-type silicon (p-Si) substrate was designed to form multi-staggered gaps (type-Ⅱ band structure) with p-Si. Among various application fields, MoS2/WS2/WSe2 was applied to the thin film catalyst of a p-Si photocathode, to effectively transfer the photogenerated electrons from p-Si to the electrolyte in the photoelectrochemical (PEC) hydrogen evolution. From a comparison between the PEC performances of the homo-structure TMDs (homo-TMDs)/p-Si and multi-TMDs/p-Si, it was demonstrated that the multi-staggered gap of multi-TMDs/p-Si improves the PEC performance significantly more than the homo-TMDs/p-Si and bare p-Si by effective charge transfer. The new in situ growth process for the fabrication of multi-TMD thin films offers a novel and innovative method for the application of multi-TMD thin films to various fields. |
| 저자 |
이상한, 서세훈
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| 소속 |
광주과학기술원 |
| 키워드 |
pulsed laser deposition; solar water splitting; TMDs
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| E-Mail |
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