Interfacial States in Donor鈥揂cceptor Organic Heterojunctions: Computational Insights into Thiophene-Oligomer/Fullerene Junctions

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• 作者：Kakali Sen ; Rachel Crespo-Otero ; Oliver Weingart ; Walter Thiel ; Mario Barbatti
• 刊名：Journal of Chemical Theory and Computation
• 出版年：2013
• 出版时间：January 8, 2013
• 年：2013
• 卷：9
• 期：1
• 页码：533-542
• 全文大小：548K
• 年卷期：v.9,no.1(January 8, 2013)
• ISSN：1549-9626

文摘

Donor鈥揳cceptor heterojunctions composed of thiophene oligomers and C₆₀ fullerene were investigated with computational methods. Benchmark calculations were performed with time-dependent density functional theory. The effects of varying the density functional, the number of oligomers, the intermolecular distance, the medium polarization, and the chemical functionalization of the monomers were analyzed. The results are presented in terms of diagrams where the electronic states are classified as locally excited states, charge-transfer states, and delocalized states. The effects of each option for computational simulations of realistic heterojunctions employed in photovoltaic devices are evaluated and discussed.