期刊
SOLAR ENERGY MATERIALS AND SOLAR CELLS
卷 93, 期 4, 页码 447-453出版社
ELSEVIER
DOI: 10.1016/j.solmat.2008.10.026
关键词
Bulk heterojunction; Organic; Photovoltaic; Spray; Deposition; Process
资金
- US Department of Energy [DE-AC36-99GO10337]
Recent improvements of organic photovoltaic power conversion efficiencies have motivated development of scalable processing techniques. We compare chlorobenzene and p-xylene, as solvents with similar bulk properties, in a case study of ultrasonic spray depositions of bulk heterojunction layers in photovoltaic devices. Structure and morphology of spray-deposited films are investigated via small-angle X-ray diffraction and optical microscopy. Unique phases are observed in bulk heterostructure films sprayed from p-xylene. Films sprayed from chlorobenzene resulted in higher device efficiencies than p-xylene due to large differences in film morphologies. Carrier loss mechanisms are also investigated. Post-production annealing increases power conversion efficiency to 3.2% when chlorobenzene is used. (C) 2008 Published by Elsevier B.V.
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