Low-Temperature Transport Properties of Photogenerated Charges in Organic Materials

被引：11

作者：

Chepelianskii, A. D. ^{[1
]}

Wang, Jianpu ^{[1
,2
]}

Friend, R. H. ^{[2
]}

机构：

[1] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[2] Nanjing Tech Univ, Inst Adv Mat, Nanjing 211816, Jiangsu, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 112卷 / 12期

基金：

英国工程与自然科学研究理事会;

关键词：

SOLAR-CELLS; POLYMER; MORPHOLOGY; SEPARATION; DYNAMICS; ENERGY; STATES; FILMS;

D O I：

10.1103/PhysRevLett.112.126802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report a new experimental method to measure the localization length of photogenerated carriers in an organic donor-acceptor photovoltaic blend by comparing their dielectric and electron spin-resonance susceptibilities, which are simultaneously measured by monitoring the resonance frequency of a superconducting resonator. We show that at cryogenic temperatures excitons are dissociated into long lived states, but that these are confined within a separation of around 4 nm. We determine the Debye and recombination times, showing the coexistence of a fast electrical response corresponding to delocalized motion, with glasslike recombination kinetics.

引用

页数：5

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