Influence of Processing Additives on Charge-Transfer Time Scales and Sound Velocity in Organic Bulk Heterojunction Films

被引：39

作者：

Kaake, Loren G. ^{[1
]}

Welch, Gregory C. ^{[1
]}

Moses, Daniel ^{[1
]}

Bazan, Guillermo C. ^{[1
]}

Heeger, Alan J. ^{[1
]}

机构：

[1] Univ Calif Santa Barbara, Ctr Polymers & Organ Solids, Santa Barbara, CA 93106 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2012年 / 3卷 / 10期

关键词：

POLYMER SOLAR-CELLS; INTERPENETRATING NETWORK; OPTICAL-ABSORPTION; ELECTRON-TRANSFER; PHOTOGENERATION; SEPARATION; STATES;

D O I：

10.1021/jz300365b

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The role of processing additives in organic bulk heterojunction thin films was investigated by means of transient absorption spectroscopy. The rate of ultrafast charge transfer was found to increase when a small amount of diiodooctane was used during film formation. In addition, coherent acoustic phonons were observed, and their velocity was determined. A strong correlation between the sound velocity and the charge-transfer time scale was observed, both of which could be explained by a subtle increase in thin film density.

引用

页码：1253 / 1257

页数：5

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