Effect of solvent on the performance and morpology of polymer photovoltaic devices
- Effect of solvent on the performance and morpology of polymer photovoltaic devices
- 김연수; 이영관; 김재경; 서은옥; 이은우; 이원주; 한성환; 이수형
- Solvent effect; P3HT; Morphology; Bulk-hetero-junction solar cells
- Issue Date
- Current applied physics
- VOL 10, NO 4, 985-989
- In the polymer photovoltaic devices (PVDs), the performance of devices was strongly influenced by
region-regularity, number average molecular weight and casting solvents of polymers. In this work, we
fabricated p–n bulk-hetero-junction PVDs based on poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl-
C60-butyric acid methyl ester (PCBM) using various solvents such as chloroform (CF), chlorobenzene
(CB), dichlorobenzene (DCB), and mixed solvent (CF/CB, CF/DCB). Thin film of active layer with P3HT/
PCBM was prepared by spin coating and thermal annealing at 150 ℃ with fixed thickness about
110 nm by adjusting solution concentration. The crystalline morphology and layered phase for the active
layer were studied by atomic force microscopy and X-ray diffraction, respectively. We investigated the
performance of solar cells according to different morphology and crystallinity of active layer by various
solvent and mixed solvent.
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