Competition between Charge-Transfer Exciton Dissociation and Direct Photocarrier Generation in Molecular Donor-Acceptor Compounds

被引：39

作者：

Tsutsumi, Jun'ya ^{[1
]}

Yamada, Toshikazu ^{[1
]}

Matsui, Hiroyuki ^{[1
,2
]}

Haas, Simon ^{[1
]}

Hasegawa, Tatsuo ^{[1
]}

机构：

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

[2] Univ Tokyo, Dept Adv Mat Sci, Kashiwa, Chiba, Japan

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 22期

基金：

日本学术振兴会;

关键词：

SOLAR-CELLS; CARRIER MOBILITY; DIFFUSION LENGTH; SEMICONDUCTORS; TRANSISTORS; COPOLYMERS; INJECTIONS;

D O I：

10.1103/PhysRevLett.105.226601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The interfacial charge-separation and photovoltaic characteristics of a molecular donor-acceptor charge-transfer compound were examined. Measurements of laser beam-induced currents on the single crystals allowed selective detection of hole and electron photocurrents through the metal-semiconductor interfaces. This method also reveals the exceptionally long diffusion length of 20 mu m in the crystal. The transition from charge-transfer exciton dissociation to direct photocarrier generation is discussed on the basis of the photon-energy-dependent diffusion length and photon-to-current conversion spectrum.

引用

页数：4

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