Enhanced Power Conversion Efficiency of Polymer Solar Cells Through the Use of 4-Fluorobenzonitrile as an Additive
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Journal of Nanoelectronics and Optoelectronics, ISSN: 1555-130X, Vol: 6, Issue: 3, Page: 338-342
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- Materials Science, Engineering, PHOTOVOLTAIC CELLS, INTERPENETRATING NETWORK, MORPHOLOGY, POLY(3-HEXYLTHIOPHENE), METHANOFULLERENES, PERFORMANCE, FILMS, 4-Fluorobenzonitrile, Additive, Thermal Annealing, Polymer Solar Cell, P3HT, PCBM
In this work, 4-fluorobenzonitrile (4-FBN) was introduced as a new additive compound into the photoactive layer of a polymer solar cell (PSC) based on a poly(3-hexylthiophene):[6,6]-phenyl-C- butyric acid methyl ester (P3HT:PCBM) blend system. The incorporation of 4-FBN allowed both increased light absorption (φ-φ* transition efficiency) in the visible region and enhanced X-ray diffraction peak of (100), which is attributed to the enhanced crystallinity of the P3HT chains, leading to a higher short-circuit current (J) and fill factor (FF). Thus, the overall efficiency of the annealed PSCs was considerably improved from 3.57% (without 4-FBN) to 4.41% (with 4-FBN). © 2011 American Scientific Publishers All rights reserved.