电荷(物理)
量子效率
序列(生物学)
载流子
光催化
重组
量子
分解水
材料科学
化学物理
化学
物理
光电子学
量子力学
催化作用
基因
生物化学
作者
Mohammad Ziaur Rahman,Jorge Gascón
出处
期刊:Matter
[Elsevier]
日期:2023-06-01
卷期号:6 (6): 2081-2093
标识
DOI:10.1016/j.matt.2023.05.008
摘要
Quantum efficiency (QE) is a defining parameter to rank the efficiency of a photocatalyst. The QE is governed by the kinetics of recombination and transfer processes of photogenerated charge carriers along with the sequence in which these events occur. However, there are no experimental techniques able to determine the sequence (i.e., series, parallel, or combination of both) of these charge transport events and directly determine the QE from charge transport information and vice versa. To address these gaps, here we report a semi-empirical circuit model to determine the sequence of charge transport events and propose a set of hypotheses to discriminate the deciding role of recombination and charge transfer in predicting the QE in a photocatalytic process. By testing with literature data for photocatalytic water splitting, we demonstrate that this model is able to predict QE when the percentage of recombination is known and the sequence of charge transport events when QE is known.
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