单重态裂变
单重态
光伏
热化
激子
发色团
光伏系统
皮秒
裂变
材料科学
工程物理
光电子学
化学物理
物理
化学
原子物理学
光学
凝聚态物理
核物理学
光化学
中子
生物
激光器
激发态
生态学
作者
Alexander J. Baldacchino,Miles I. Collins,Michael P. Nielsen,Timothy W. Schmidt,Dane R. McCamey,Murad J. Y. Tayebjee
出处
期刊:Chemical physics reviews
[American Institute of Physics]
日期:2022-05-11
卷期号:3 (2)
被引量:51
摘要
Singlet fission is a form of multiple exciton generation, which occurs in organic chromophores when a high-energy singlet exciton separates into two lower energy triplet excitons, each with approximately half the singlet energy. Since this process is spin-allowed, it can proceed on an ultrafast timescale of less than several picoseconds, outcompeting most other loss mechanisms and reaching quantitative yields approaching 200%. Due to this high quantum efficiency, the singlet fission process shows promise as a means of reducing thermalization losses in photovoltaic cells. This would potentially allow for efficiency improvements beyond the thermodynamic limit in a single junction cell. Efforts to incorporate this process into solar photovoltaic cells have spanned a wide range of device structures over the past decade. In this review, we compare and categorize these attempts in order to assess the state of the field and identify the most promising avenues of future research and development.
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