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Issue
Korean Journal of Chemical Engineering,
Vol.32, No.2, 261-267, 2015
Molecular structure-device performance relationship in polymer solar cells based on indene-C60 bis-adduct derivatives
Cho HH, Cho CH, Kang H, Yu H, Oh JH, Kim BJ
Interfacial tension between two materials is a key parameter in determining their miscibility and, thus, their morphological behavior in blend films. In bulk heterojunction (BHJ)-type polymer solar cells (PSCs), control of the interfacial tension between the electron donor and the electron acceptor is critically important in order to increase miscibility and achieve optimized BHJ morphology for producing efficient exciton dissociation and charge transport. Herein, we report the synthesis of a series of indene-C60 bis-adducts (ICBA) derivatives by modifying their end-groups with fluorine (FICBA), methoxy (MICBA) and bromine (BICBA) functional units. We systematically studied the effects of their structural changes on the blend morphology with poly(3-hexylthiophene) (P3HT) and their performance in the PSCs. The end-group modification of ICBA derivatives induced a dramatic change in their interfacial tensions with P3HT (i.e., from 4.9 to 8.3mN m-1), resulting in large variations in the power conversion efficiency (PCE) of the PSCs, ranging from 2.9 to 5.2%.
Keywords: Electron Acceptors; End Group Modification; Fullerene Bis-adducts; Interfacial Tension; Polymer Solar Cell
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[Cited By]
  1. Zafar M, Yun JY, Kim DH, Korean Journal of Chemical Engineering, 34(5), 1504, 2017
  2. Zafar M, Yun JY, Kim DH, Korean Journal of Chemical Engineering, 35(2), 567, 2018
  3. Song JK, Kim DH, Korean Chemical Engineering Research, 58(1), 1, 2020
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