Improved Crystallinity of Poly(3-hexylthiophene-2,5-diyl):[6,6]-Phenyl-C61 Butyric Acid Methyl Ester Film by Pulsed Electrospray Deposition |
| |
| Authors: | Katsumi Suzuki Asuki Toda Yingjie Liao Norihiko Kamata Zentaro Honda |
| |
| Institution: | 1. Department of Functional Materials Science, Saitama University, Sakura-ku, Saitama, Japan;2. Hosei University, Koganei-shi, Tokyo, Japan |
| |
| Abstract: | We investigated crystallinity parameters and ordering domains of poly(3-hexylthiophene-2,5-diyl) blended in 6,6]-phenyl-C61-butyric acid methyl ester films, which were fabricated by pulsed electrospray deposition methods. The crystallinity parameter and the ordering domain were estimated from Raman and optical absorption spectra, respectively. As a result, they were improved with decreasing the off time of pulse voltage, corresponding to the slow evaporation speed of solvent. In addition, both the space-charge limited current mobility and the photoconversion efficiency showed same trend. A highest photoconversion efficiency of 1.11 % was achieved without the thermal annealing process after depositing the active layer. |
| |
| Keywords: | |
|
|
