Formation of relaxed charge-transfer excitons in donor-acceptor-type polymer solar cells

被引：8

作者：

Tsutsumi, Jun'ya ^{[1
]}

Matsuzaki, Hiroyuki ^{[1
]}

Kanai, Naoyuki ^{[2
]}

Yamada, Toshikazu ^{[1
]}

Hasegawa, Tatsuo ^{[1
,3
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058562, Japan

[2] Fuji Elect Co Ltd, Hino, Tokyo 1918502, Japan

[3] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2014年 / 53卷 / 05期

基金：

日本学术振兴会;

关键词：

PERFORMANCE; SEPARATION; EFFICIENCY; ENERGY; STATES;

D O I：

10.7567/JJAP.53.05HB12

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The formation of relaxed charge-transfer (CT) excitons and its effect on photocarrier generation in a series of donor-acceptor (DA)-type polymers were examined with a focus on the two unique absorption bands that originate from low-energy charge-transfer (CT) and high-energy main-chain (MC) excitations, respectively. The photoluminescence in response to the CT excitation demonstrated Stokes shift, which is a clear evidence of the formation of bound CT excitons associated with a strong lattice relaxation. Results indicate that photocarriers are generated indirectly by CT excitation through the formation of bound electron-hole pairs, the binding energy and lifetime of which correlate with the donor-acceptor CT degree in the DA-type polymers. (C) 2014 The Japan Society of Applied Physics

引用

页数：5

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