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Synthesis and Characterization of New Donor-Acceptor Type Copolymers Based on Fluorene Derivatives for Photovoltaic Solar Cells

Synthesis and Characterization of New Donor-Acceptor Type Copolymers Based on Fluorene Derivatives for Photovoltaic Solar Cells

Gwang Yeon Kim, Myeon-Cheon Choi, Myungkwan Song, Sung-Ho Jin, Der-Jang Liaw, Han-Yu Wu, Ying-Chi Huang, Chang-Sik Ha

J Nanosci Nanotechnol. 2012 Jul;12(7):5735-41.

PMID: 22966645

Abstract:

In this paper, we demonstrated the successful synthesis of newly designed copolymers, C1 and C2, with donor-acceptor type structure. Both C1 and C2 copolymers contained 9,9-dioctylfluorene-2,7-bis(trimethyleneboronate) as one constructional unit to improve the solubility in common organic solvents. The other constructional unit was 2,3-bis(5-bromothiophen-2-yl)acrylonitrile (DTDBAL) for C1, while 4,7-dibromobenzo[c][1,2,5]thiadiazole unit, 5,5'-dibromo-2,2'-bithiophene unit and N1, N1-bis(4-bromophenyl)-N4,N4-bis(4-(2-phenylpropan-2-yl)phenyl)benzene-1,4-diamine are for C2. We fabricated photovoltaic devices based on the C1 and the C2 copolymers with Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) layer, PC70BM layer, TiOx layer, and aluminum (Al) electrode. The bulk heterojuntion photovoltaic devices using these copolymers as electron donor and PC70BM as the acceptor exhibited good device performances when measured at 100 mW cm-2. The power conversion efficiency (PCE) of the C1 device reached 0.45% with Voc, Jsc and FF of 0.51, 2.50 and 35%, respectively. The PCE of the C2 device reached 0.34% with Voc, Jsc, and FF of 0.56, 2.01 and 30%, respectively.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP15155416	4,7-Dibromobenzo[c]-1,2,5-thiadiazole		15155-41-6	Price
AP4805225	5,5′-Dibromo-2,2′-bithiophene		4805-22-5	Price

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