Controlling the morphology of trioctyl phosphine oxide-coated cadmium selenide/poly 3-hexyl thiophene composite active layer for bulk hetero-junction solar cells |
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| Authors: | Nguyen Tam Nguyen Truong Matthew Lowell Monroe Umme Farva Timothy James Anderson and Chinho Park |
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| Affiliation: | (1) Electronic Materials Division, National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi, 110 012, India;(2) Department of Chemistry, University of Delhi, Delhi, 110 007, India;(3) Department of Physics, Indian Institute of Technology, New Delhi, 110 016, India; |
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| Abstract: | Bulk hetero-junction solar cells with CdSe nanoparticles-P3HT (poly 3-hexyl thiophene) composite active layer were fabricated, and the control of morphological feature of the nanoparticle-polymer
composite thin films was investigated. A binary solvent composed of a primary solvent with intermediate polarity and a secondary
solvent with high polarity was found to be effective in controlling the dispersion of the CdSe nanocrystals in the P3HT matrix, and the modification of the nanocrystal surface by liquid-liquid extraction process was found to be effective in
achieving the desired composite film morphology. Surface roughness of the active layer was optimized for various loadings
of CdSe nanoparticles and could be reproducibly controlled to less than 10 nm. |
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