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- Title
Conductivity of solution-processed films of a metal-free chlorophyll derivative: drop casting vs. spin coating.
- Authors
Koptyaev, Andrey I.; Travkin, Vlad V.; Sachkov, Yury I.; Romanenko, Yuliya V.; Pakhomov, Georgy L.
- Abstract
Thin films of a chlorophyll-like compound methyl-pheophorbide a (Pheo) were prepared from a solution by both spin-coating and drop-casting methods. Despite the fundamental similarity of these two techniques, different self-assembly conditions of Pheo molecules determined the difference in the films morphology. Smoother films without detectable crystallinity were obtained by the spin-coating method, while the drop-cast films featured ordering of molecules and formation of clusters with a size of ~ 1 µm and more. As a result, the films have different photoelectrical properties and, hence, the conditions governing the aggregate growth should be controlled precisely. The Pheo films in any form are good photoconductors: photons from the red and near-infrared domain are the main contributors in the photoinduced current.
- Subjects
SPIN coating; METALLIC films; THIN films; PHOTORESISTORS; PHOTONS; CRYSTALLINITY
- Publication
Journal of Materials Science: Materials in Electronics, 2021, Vol 32, Issue 13, p17791
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-021-06315-5