Ultrafast Dynamics of Charge Transfer and Photochemical Reactions in Solar Energy Conversion. Issue 12 (11th October 2018)

• Record Type: Journal Article
• Authors: Xu, Jing‐Yin; Tong, Xin; Yu, Peng; Wenya, Gideon Evans; McGrath, Thomas; Fong, Matthew James; Wu, Jiang; Wang, Zhiming M.
• Is Part Of: Advanced science. Volume 5:Issue 12(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-10-11
• Subjects: energy transfer dynamics -- photocatalysis -- solar energy conversion -- time‐resolved spectroscopy; Science -- Periodicals; 505
• DOI: 10.1002/advs.201800221
• Languages: English
• ISSNs: 2198-3844

Abstract

Abstract: 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. Abstract : A brief overview of the fundamental charge carrier dynamic processes including interfacial electron transfer, excitons fission, and combination in optoelectronic materials is provided. The energy/electron transfer dynamics in solar energy conversion revealed by transient absorption‐spectroscopic techniques are discussed in detail. A foundation for the rational design of solar energy conversion devices is provided via the insight into charge transfer dynamics.