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The Role of Morphology Control in Determining the Performance of P3HT/C-70 Bulk Heterojunction Polymer Solar Cells
Tang, Haowei; Lu, Guanghao; Yang, Xiaoniu
2010-11-01
Source PublicationIEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
ISSN1077-260X
Volume16Issue:6Pages:1725-1731
AbstractMorphology is one of the critical elements in determining the performance of polymer solar cells. As an important member in fullerene family, unsubstituted C-70 is scarcely employed to prepare polymer solar cells as compared with its derivatives, which is ascribed to its poor solution processability from a single organic solvent. Hereby, we show a method by using mixed solvent to prepare poly(3-hexylthiophene) (P3HT)/C-70 photoactive layer for high-performance polymer solar cells. Composite films spin coated from the solution with different mixed solvents are characterized by optical microscopy, transmission electron microscopy, UV-vis spectroscopy, and photovoltaic (PV) device characterization. As a result, heptane/o-dichlorobenzene (ODCB) mixture is found to be a good combination to prepare homogenous P3HT/C-70 film, and a high-performance device is thus obtained. By further optimizing the ratio between the donor P3HT and acceptor C-70 in the composite film, the PV cells with a power conversion efficiency of 2.24% have been achieved, which is much higher than that of the device prepared from ODCB-only solution. Dynamic light scattering measurement implies that C-70 molecules form aggregates with size of similar to 250 nm in ODCB solution, while in heptane/ODCB mixture, the aggregates are much smaller, which is responsible for the homogenous P3HT/C-70 film and also high device performance. This paper demonstrates a vivid approach to control the morphology of polymer solar cells, and thus significantly improved performance via deliberately designed solvent system for thin-film deposition.
KeywordFullerene Mixed Solvent Morphology Polymer Solar Cells
DOI10.1109/JSTQE.2010.2042034
Indexed BySCI
Language英语
WOS IDWOS:000288488400028
PublisherIEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/69072
Collection中国科学院化学研究所
Corresponding AuthorTang, Haowei
AffiliationChinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
Recommended Citation
GB/T 7714
Tang, Haowei,Lu, Guanghao,Yang, Xiaoniu. The Role of Morphology Control in Determining the Performance of P3HT/C-70 Bulk Heterojunction Polymer Solar Cells[J]. IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS,2010,16(6):1725-1731.
APA Tang, Haowei,Lu, Guanghao,&Yang, Xiaoniu.(2010).The Role of Morphology Control in Determining the Performance of P3HT/C-70 Bulk Heterojunction Polymer Solar Cells.IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS,16(6),1725-1731.
MLA Tang, Haowei,et al."The Role of Morphology Control in Determining the Performance of P3HT/C-70 Bulk Heterojunction Polymer Solar Cells".IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS 16.6(2010):1725-1731.
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