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Annealing effect of polymer bulk heterojunction solar cells based on polyfluorene and fullerene blend

Jen-Hsien, Huang and Chuan, Yi Yang and Zhong , Yo Ho and Kekuda, Dhananjaya and Meng, Chyi Wu and Fang-Chung, Chen and Chih, Wei Chu and Kuo, Chuan Ho (2009) Annealing effect of polymer bulk heterojunction solar cells based on polyfluorene and fullerene blend. Organic Electronics, 10. pp. 27-33. ISSN 1566-11999

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Abstract

Control of blend morphology at the nanoscale and high charge mobility is essential for polymer photovoltaic devices in terms of their power conversion efficiencies (PCE). In the case of bulk heterojunctions solar cells, both blend morphology and charge mobility are influenced by thermal treatment. In this manuscript, we study the effects of annealing temperature on polymer PV devices with blends of poly[9,9’- dioctyl-fluorene-co-bithiophene] (F8T2) and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM). The morphological changes of blended films were observed upon thermal annealing temperature near and above glass transition temperature (130 �C). Such microstructural transformations resulted in modified charge transport pathways and therefore greately influenced the device performance. The highest PCE of 2.14% with an open-circuit voltage (VOC) of 0.99 V and a shortcircuit current (JSC) of 4.24 mA/cm2 was achieved by device annealing at 70 �C for 20 min.

Item Type: Article
Uncontrolled Keywords: Photovoltaic device; Polymer; F8T2; Annealing effect
Subjects: Engineering > MIT Manipal > Physics
Depositing User: MIT Library
Date Deposited: 16 Oct 2013 06:48
Last Modified: 16 Oct 2013 06:48
URI: http://eprints.manipal.edu/id/eprint/137489

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