Measurement of exciton diffusion lengths of phthalocyanine derivatives based on interlayer excitation transfer

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Article

Ichikawa, Musubu^1,2 

[1] Shinshu Univ, Interdisciplinary Grad Sch Sci & Technol, Dept Biosci & Text Technol, Ueda, Nagano 3868567, Japan

[2] Japan Sci & Technol Agcy JST, Presto, Kawaguchi, Saitama 3320012, Japan

关键词: Exciton diffusion length;    Organic photovoltaics;    Organic solar cells;    Phthalocyanine;    Excitation transfer;   

DOI  :  10.1016/j.tsf.2012.12.036

来源: Elsevier

【 摘 要 】

The exciton diffusion length (L-D) of several phthalocyanines (Pcs) was investigated by use of organic photovoltaic cells, where two different p-type organic semiconductor materials, including a Pc layer, were laminated, and interlayer excitation energy transfer occurred between them. The distribution of excitons in the Pc layer that accept energy from the other p-type semiconductor material by excitation transfer should be much narrower than that of excitons created by light absorption directly. This delta-function-like generation of excitons allowed the simple analysis of exciton diffusion. The results of the analysis indicated that the planar Pcs (copper Pc and metal-free Pc) showed shorter L(D)s of around 5 nm, as compared to the 18.5 +/- 4.8 nm shown by the pyramidal-shaped Pc (tin Pc). (C) 2012 Elsevier B. V. All rights reserved.

【 授权许可】

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