ICCAS OpenIR
Photovoltaic properties of poly(benzothiadiazole-thiophene-co-bithiophene) as donor in polymer solar cells
Zhao, Guangjin1,2; He, Youjun1; He, Chang1; Fan, Haijun1; Zhao, Yun1; Li, Yongfang1
2011-02-01
Source PublicationSOLAR ENERGY MATERIALS AND SOLAR CELLS
ISSN0927-0248
Volume95Issue:2Pages:704-711
AbstractWe report the photovoltaic properties of a D-A copolymer, poly(benzothiadiazole-thiophene-co-bithiophene) (PBTTbT), containing the donor (D) unit of oligothiophene with a hexyl side chain and the acceptor (A) unit of 2,1,3-benzothiadiazole (BT) with a methyl side chain. The geometry, electronic and absorption spectroscopic properties of bithiophene-benzothiadiazole-thiophene monomer (M1) of the polymer were investigated theoretically by the density functional theory (DFT) method for deep understanding the relationship of the structure and properties of the polymer. Polymer solar cells (PSCs) were fabricated with PBTTbT as an electron donor blended with [6,6]-phenyl-C71-butyric acid methyl ester (PC(70)BM) as an electron acceptor. The power conversion efficiency (PCE) of PSC is 0.87% for an optimized PBTTbT:PC(70)BM weight ratio of 1:3, under the illumination of AM 1.5, 100 mW/cm(2). With the additive of 1% 1,8-dioctanedithiol and thermal annealing at 130 degrees C for 15 min, the PCE of the device was improved to 1.98%. The efficiency improvement of the device was ascribed to a better morphology of the PBTTbT:PC(70)BM active layer with the additive and thermal annealing. (C) 2010 Elsevier B.V. All rights reserved.
KeywordPolymer Solar Cells Low Bandgap Conjugated Polymers Conjugated Polymer Photovoltaic Materials Additives Thermal Annealing
DOI10.1016/j.solmat.2010.10.007
Indexed BySCI
Language英语
WOS IDWOS:000287006900045
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:26[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/73102
Collection中国科学院化学研究所
Corresponding AuthorLi, Yongfang
Affiliation1.Chinese Acad Sci, Inst Chem, CAS Key Lab Organ Solids, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China
2.Henan Elect Power Res Inst, Zhengzhou 450052, Peoples R China
Recommended Citation
GB/T 7714
Zhao, Guangjin,He, Youjun,He, Chang,et al. Photovoltaic properties of poly(benzothiadiazole-thiophene-co-bithiophene) as donor in polymer solar cells[J]. SOLAR ENERGY MATERIALS AND SOLAR CELLS,2011,95(2):704-711.
APA Zhao, Guangjin,He, Youjun,He, Chang,Fan, Haijun,Zhao, Yun,&Li, Yongfang.(2011).Photovoltaic properties of poly(benzothiadiazole-thiophene-co-bithiophene) as donor in polymer solar cells.SOLAR ENERGY MATERIALS AND SOLAR CELLS,95(2),704-711.
MLA Zhao, Guangjin,et al."Photovoltaic properties of poly(benzothiadiazole-thiophene-co-bithiophene) as donor in polymer solar cells".SOLAR ENERGY MATERIALS AND SOLAR CELLS 95.2(2011):704-711.
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