Ultrafast Studies of Charge Generation in PCBM:P3HT Blend Films following Excitation of the Fullerene PCBM

被引：159

作者：

Cook, Steffan ^{[1
]}

Katoh, Ruyzi ^{[1
]}

Furube, Akihiro ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058565, Japan

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2009年 / 113卷 / 06期

关键词：

POLYMER SOLAR-CELLS; PHOTOINDUCED ELECTRON-TRANSFER; ORGANIC PHOTOVOLTAIC CELLS; BULK-HETEROJUNCTION; TRANSIENT ABSORPTION; CONJUGATED POLYMERS; CARRIER GENERATION; EXCITED-STATES; LARGE-AREA; PERFORMANCE;

D O I：

10.1021/jp8050774

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：

In order to better understand the limits of [6,6]phenyl C-61-butyric acid methyl ester/poly(3-hexylthiophene) (PCBM:P3HT) organic solar cell device performance, ultrafast transient absorption spectroscopy has been used to probe the dynamics of charge creation in films of PCBM:P3HT following excitation of the fullerene. The time scale for splitting of the PCBM singlet excited state and "hole" transfer across the polymer-fullerene donor-acceptor interface is found to be faster than the system resolution of 250 fs and is calculated to occur with near unity efficiency. Ironically, this very quick electron transfer is discussed as being inefficient with regard to organic solar cell device power conversion efficiency as an excess amount of energy is used up in the electron transfer step.

引用

页码：2547 / 2552

页数：6

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