Ultrafast Dynamics of Charge Transfer and Photochemical Reactions in Solar Energy Conversion,Advanced Science

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Ultrafast Dynamics of Charge Transfer and Photochemical Reactions in Solar Energy Conversion
Advanced Science ( IF 14.3 ) Pub Date : 2018-10-11 , DOI: 10.1002/advs.201800221
Jing-Yin Xu ₁ , Xin Tong ₁ , Peng Yu ₁ , Gideon Evans Wenya ₁ , Thomas McGrath ₂ , Matthew James Fong ₂ , Jiang Wu _{1,

3} , Zhiming M Wang ₁

Affiliation

For decades, ultrafast time‐resolved spectroscopy has found its way into an increasing number of applications. It has become a vital technique to investigate energy conversion processes and charge transfer dynamics in optoelectronic systems such as solar cells and solar‐driven photocatalytic applications. The understanding of charge transfer and photochemical reactions can help optimize and improve the performance of relevant devices with solar energy conversion processes. Here, the fundamental principles of photochemical and photophysical processes in photoinduced reactions, in which the fundamental charge carrier dynamic processes include interfacial electron transfer, singlet excitons, triplet excitons, excitons fission, and recombination, are reviewed. Transient absorption (TA) spectroscopy techniques provide a good understanding of the energy/electron transfer processes. These processes, including excited state generation and interfacial energy/electron transfer, are dominate constituents of solar energy conversion applications, for example, dye‐sensitized solar cells and photocatalysis. An outlook for intrinsic electron/energy transfer dynamics via TA spectroscopic characterization is provided, establishing a foundation for the rational design of solar energy conversion devices.

中文翻译：

太阳能转换中电荷转移和光化学反应的超快动力学

几十年来，超快时间分辨光谱学已进入越来越多的应用领域。它已成为研究太阳能电池和太阳能驱动光催化应用等光电系统中能量转换过程和电荷转移动力学的重要技术。对电荷转移和光化学反应的理解有助于优化和提高太阳能转换过程相关器件的性能。本文综述了光诱导反应中光化学和光物理过程的基本原理，其中基本载流子动力学过程包括界面电子转移、单线态激子、三线态激子、激子裂变和复合。瞬态吸收（TA）光谱技术可以很好地理解能量/电子转移过程。这些过程，包括激发态生成和界面能量/电子转移，是太阳能转换应用的主要组成部分，例如染料敏化太阳能电池和光催化。通过 TA 光谱表征对本征电子/能量转移动力学进行了展望，为太阳能转换装置的合理设计奠定了基础。

更新日期：2018-10-11

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