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Journal of Materials Chemistry C Vol - 4 Issue - 29

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Highly ordered bimolecular crystalline blends for low-noise and high-detectivity polymeric photodiodes

Content Provider	Royal Society of Chemistry (RSC)
Author	Yoon, Seongwon Sim, Kyu Min Chung, Dae Sung
Copyright Year	2016
Abstract	Suppressing noise current while maintaining high quantum efficiency is essential for realizing high-performance photodiodes. Solution-processed polymeric photodiodes, however, often suffer from high noise current levels because of undesired charge injection in the reverse saturation regime or localized energy states, resulting from the presence of structural imperfection. In this study, we demonstrated that such structural disorder can be avoided by constructing active layers with bimolecular crystallites. X-ray analyses of poly(2,5-bis(3-tetradecyllthiophene-2-yl)thieno[3,2-b]thiophene):phenyl-C61-butyric acid methyl ester blends confirmed low paracrystalline disorder and a high degree of orientation ordering of the active layers. The resulting optimized photodiodes with 80% PCBM content showed a high detectivity value of 1.95 × 1012 Jones, a high bandwidth of 1 kHz, and a high 94 dB linear dynamic range. This result implies that optimizing the structural perfectness of the active layers can be a decisive factor for low noise current and thus high detectivity of the solution-processed polymeric photodiodes.
Starting Page	9197
Ending Page	9202
Page Count	6
File Format	HTM / HTML PDF
ISSN	20507526
Volume Number	4
Issue Number	39
Journal	Journal of Materials Chemistry C
DOI	10.1039/c6tc03325c
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Jones Quantum tunnelling X-ray crystallography Thiophene Phenyl-C61-butyric acid methyl ester Carboxylic acid Ester Paracrystalline Dynamic range
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry

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