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Dual‐Hole Excitons Activated Photoelectrolysis in Neutral Solution
Author(s) -
Hung SungFu,
Chen ZhiZhong,
Chang ChunChih,
Hsu ChiaShuo,
Tsai MingKang,
Kang ChiaCheng,
Chen Hao Ming
Publication year - 2018
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201704047
Subject(s) - photocurrent , photoelectrolysis , materials science , semiconductor , exciton , optoelectronics , chemical physics , photocatalysis , cluster (spacecraft) , thermalisation , photochemistry , atomic physics , electrolysis , physics , chemistry , electrode , condensed matter physics , catalysis , biochemistry , computer science , electrolyte , programming language
II–VI semiconductors exhibit unique behaviors that can generate dual‐holes (“heavy and light”), but the application in photocatalysis is still missing. Herein, an empirical utilization of light/heavy holes in a hybrid metal cluster‐2D semiconductor nanoplatelets is reported. This hybrid material can boost the hole‐transfer at the surface and suppress the recombination. Different roles are enacted by light‐holes and heavy‐holes, in which the light‐holes with higher energy and mobility can facilitate the slow kinetics of water oxidation and further reduce the onset voltage, while the massive heavy‐holes can increase the resulting photocurrent by about five times, achieving a photocurrent of 2 mA cm −2 at 1.23 V versus RHE under AM 1.5 G illumination in nonsacrificial neutral solution. These strategies can be the solutions for photoelectrolysis and be beneficial for sustainable development in solar conversion.