Journal
JAPANESE JOURNAL OF APPLIED PHYSICS
Volume 58, Issue 5, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.7567/1347-4065/ab0a84
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Funding
- Thailand Research Fund [MRG6080173]
- Kasetsart University Research and Development Institute [228.61]
- King Mongkut's University of Technology Thonburi through the KMUTT 55th Anniversary Commemorative Fund
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It is well known that thermal annealing of region-regular poly(3-hexylthiophene-2,5-diyl) and [6,6]-phenyl-C61-butyric acid methyl ester (P3HT: PCBM) solar cells helps in improving their overall performance. When aluminum (Al) is used as the electrode, it has been found that annealing causes the Al atoms to diffuse into the organic layer and to form what is called a mixed layer. In this work, we studied the diffusion of Al and using Fick's second law, calculated its diffusivity in a P3HT:PCBM heterojunctions layer. By employing energy dispersive X-ray spectroscopy elemental mapping, a diffusion constant of about 1.8 x 10(-21) cm(2) s(-1) for devices annealed at 120 degrees C was obtained. (C) 2019 The Japan Society of Applied Physics
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