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Nguyen Tam Nguyen Truong,박진호,Matthew Lowell Monroe,Umme Farva,Timothy James Anderson 한국화학공학회 2011 Korean Journal of Chemical Engineering Vol.28 No.7
Bulk hetero-junction solar cells with CdSe nanoparticles-P_3HT (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 P_3HT 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.