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Organic Photovoltaics: On the Study of Exciton Binding Energy with Direct Charge Generation in Photovoltaic Polymers (Adv. Electron. Mater. 11/2016)
Author(s) -
Li HoWa,
Guan Zhiqiang,
Cheng Yuanhang,
Lui Taili,
Yang Qingdan,
Lee ChunSing,
Chen Song,
Tsang SaiWing
Publication year - 2016
Publication title -
advanced electronic materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.25
H-Index - 56
ISSN - 2199-160X
DOI - 10.1002/aelm.201670063
Subject(s) - photoexcitation , materials science , exciton , photovoltaics , polymer , organic solar cell , photovoltaic system , charge (physics) , electron , optoelectronics , conjugated system , excitation , chemical physics , condensed matter physics , chemistry , physics , electrical engineering , composite material , engineering , quantum mechanics
Exciton and free‐charge generation processes upon photoexcitation in pristine photovoltaic polymers are investigated and reported by H.‐W. Li et al. in article number 1600200. It is found that there is a clear transition from excitonic to free charge generation with increasing excitation energy. Exciton binding energies and the correspondence with the material dielectric are obtained in a series of conjugated polymers. The results shed light on the understanding of primary charge generation process in organic photovoltaic cells.