Acceptor Energy Level Control of Charge Photogeneration in Organic Donor/Acceptor Blends

详细信息    查看全文

• 作者：Safa Shoaee ; Tracey M. Clarke ; Chun Huang ; Stephen Barlow ; Seth R. Marder ; Martin Heeney ; Iain McCulloch ; James R. Durrant
• 刊名：Journal of the American Chemical Society
• 出版年：2010
• 出版时间：September 22, 2010
• 年：2010
• 卷：132
• 期：37
• 页码：12919-12926
• 全文大小：295K
• 年卷期：v.132,no.37(September 22, 2010)
• ISSN：1520-5126

文摘

In this paper we focus upon the role of interfacial energetics in influencing the separation of charge transfer states into dissociated charge carriers in organic donor/acceptor blend films. In particular, we undertake transient optical studies of films comprising regioregular poly(3-hexylthiophene) (P3HT) blended with a series of perylene-3,4:9,10-tetracarboxydiimide (PDI) electron acceptors. For this film series, we observe a close correlation between the PDI electron affinity and the efficiency of charge separation. This correlation is discussed in the context of studies of charge photogeneration for other organic donor/acceptor blend films, including other polymers, blend compositions, and the widely used electron acceptor 3′-phenyl-3′H-cyclopropa[1,9](C₆₀-I_h)[5,6]fullerene-3′-butanoic acid methyl ester (PCBM).