標題: Synthesis and Applications of Low-Bandgap Conjugated Polymers Containing Phenothiazine Donor and Various Benzodiazole Acceptors for Polymer Solar Cells
作者: Padhy, Harihara
Huang, Jen-Hsien
Sahu, Duryodhan
Patra, Dhananjaya
Kekuda, Dhananjay
Chu, Chih-Wei
Lin, Hong-Cheu
材料科學與工程學系
光電工程學系
Department of Materials Science and Engineering
Department of Photonics
關鍵字: conjugated polymers;copolymerization;donor-acceptor;heteroatom-containing polymers;phenothiazine derivatives;solar cells
公開日期: 1-Nov-2010
摘要: A series of soluble donor-acceptor conjugated polymers comprising of phenothiazine donor and various benzodiazole acceptors (i.e., benzothiadiazole, benzoselenodiazole, and benzoxadiazole) sandwiched between hexyl-thiophene linkers were designed, synthesized, and used for the fabrication of polymer solar cells (PSC). The effects of the benzodiazole acceptors on the thermal, optical, electrochemical, and photovoltaic properties of these low-bandgap (LBG) polymers were investigated. These LBG polymers possessed large molecular weight (M(n)) in the range of 3.85-5.13 x 10(4) with high thermal decomposition temperatures, which demonstrated broad absorption in the region of 300-750 nm with optical bandgaps of 1.80-1.93 eV. Both the HOMO energy level (-5.38 to -5.47 eV) and LUMO energy level (-3.47 to -3.60 eV) of the LBG polymers were within the desirable range of ideal energy level. Under 100 mW/cm(2) of AM 1.5 white-light illumination, bulk heterojunction PSC devices containing an active layer of electron donor polymers mixed with electron acceptor [6,6]-phenyl-C(61)-butyric acid methyl ester (PC(61)BM) or [6,6]-phenyl-C(71)-butyric acid methyl ester (PC(71)BM) in different weight ratios were investigated. The best performance of the PSC device was obtained by using polymer PP6DHTBT as an electron donor and PC(71)BM as an acceptor in the weight ratio of 1:4, and a power conversion efficiency value of 1.20%, an open-circuit voltage (V(oc)) value of 0.75 V, a short-circuit current (J(sc)) value of 4.60 mA/cm(2), and a fill factor (FF) value of 35.0% were achieved. (C) 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 4823-4834, 2010
URI: http://dx.doi.org/10.1002/pola.24273
http://hdl.handle.net/11536/31972
ISSN: 0887-624X
DOI: 10.1002/pola.24273
期刊: JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
Volume: 48
Issue: 21
起始頁: 4823
結束頁: 4834
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