Miscibility in binary blends of non-peripheral alkylphthalocyanines and their application for bulk-heterojunction solar cells |
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| Affiliation: | 1. Group of Applied Instrumental Analysis, Department of Chemistry, Federal University of São Carlos, P.O. Box 676, São Carlos SP 13560-970, Brazil;2. Department of Chemistry, Wake Forest University, Winston-Salem NC 27109, USA |
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| Abstract: | The fabrication of small-molecule bulk-heterojunction solar cells utilizing a mixed donor material composed of two types of soluble phthalocyanine derivatives with different substituent length has been studied. The power conversion efficiency (PCE) and short-circuit current density (Jsc) of the solar cells fabricated using the mixed donor material with an optimized mixture ratio reached 3.8% and 9.2 mA/cm2, respectively, which were superior to those of organic solar cells utilizing each type of phthalocyanine derivative as a single donor material. The improvement of PCE and Jsc has been discussed from the viewpoints of the miscibility and carrier transport properties of the mixed donor material. |
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| Keywords: | Organic solar cells Bulk-heterojunction Phthalocyanine derivatives Mixed donor materials Miscibility |
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