Wafer-Scale Semitransparent MoS 2 /WS 2 Heterojunction Catalyst on a Silicon Photocathode for Efficient Hydrogen Evolution.

Autor: Lee JY; KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Republic of Korea.; School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore., Jun SE; Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea.; Inter-university Semiconductor Research Center, Seoul National University, Seoul, 08826, Republic of Korea., Shim JH; KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Republic of Korea., Kang HS; KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Republic of Korea., Kim C; Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea., Kim K; Institute of Physics and Applied Physics, Yonsei University, Seoul, 03722, Republic of Korea.; Van der Waals Materials Research Center, Yonsei University, Seoul, 03722, Republic of Korea.; Advanced Analysis Center, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea., An JY; KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Republic of Korea., Choi S; Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea., Yun J; School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore., Kang J; Department of Electrical and Computer Engineering, Seoul National University, Seoul, 08826, Republic of Korea., Lee SW; School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore., Park S; Advanced Analysis Center, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea., Lee H; Department of Physics, Kangwon National University, Chuncheon, 24341, Republic of Korea.; Institute for Accelerator Science, Kangwon National University, Chuncheon, 24341, Republic of Korea., Yi Y; Institute of Physics and Applied Physics, Yonsei University, Seoul, 03722, Republic of Korea.; Van der Waals Materials Research Center, Yonsei University, Seoul, 03722, Republic of Korea., Jang HW; Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea.; Advanced Institute of Convergence Technology, Seoul National University, Suwon, 16229, Republic of Korea., Lee CH; Inter-university Semiconductor Research Center, Seoul National University, Seoul, 08826, Republic of Korea.; Department of Electrical and Computer Engineering, Seoul National University, Seoul, 08826, Republic of Korea.
Jazyk: angličtina
Zdroj: Small (Weinheim an der Bergstrasse, Germany) [Small] 2024 Oct 31, pp. e2407650. Date of Electronic Publication: 2024 Oct 31.
DOI: 10.1002/smll.202407650
Abstrakt: The development of catalysts that are optically transparent, electrically charge-transferable, and capable of protecting underlying photoactive semiconductors is crucial for efficient photoelectrochemical (PEC) hydrogen production. However, meeting all these requirements simultaneously poses significant challenges. In this study, the fabrication of a wafer-scale transparent bilayer MoS 2 /WS 2 catalyst is presented with a staggered heterojunction, optimized for photon absorption, extraction of photogenerated charge carriers, and surface passivation of p-Si photocathode. The MoS 2 and WS 2 monolayers are grown via metal-organic chemical vapor deposition, followed by sequential transfer and stacking onto the p-Si photocathode. The resulting type-II heterojunction film establishes a strong built-in electric field for rapid charge carrier transport and effectively protects the Si surface from oxidation and corrosion. The fabricated MoS 2 /WS 2 /p-Si photocathode demonstrates outstanding PEC performance, achieving a high photocurrent density of -25 mA cm -2 at 0 V versus reversible hydrogen electrode, along with enhanced stability compared to monolayer MoS 2 /p-Si. This work provides promising strategies for developing optically transparent, electrically active, and protective catalysts for practical PEC energy conversion systems.
(© 2024 The Author(s). Small published by Wiley‐VCH GmbH.)
Databáze: MEDLINE
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