Semiconductor Physics, Quantum Electronics & Optoelectronics, 25 (1), P. 049-057 (2022).
DOI: https://doi.org/10.15407/spqeo25.01.049

Photoluminescence of melanin-based nanocomposites with fullerene derivative
A.O. Kostetskyi1*, Yu.P. Piryatinski1, A.B. Verbitsky1, P.M. Lutsyk2, A.G. Rozhin2

1Institute of Physics, National Academy of Sciences of Ukraine,
46, prosp. Nauky, 03680 Kyiv, Ukraine
2Aston University, Aston Triangle, B47ET Birmingham, UK
*Corresponding author e-mail: tohakostet@gmail.com

Abstract. This paper presents the study of the photoluminescent properties of molecular compositions consisting of melanin and an electron-acceptor material – fullerene derivative, [6,6]-phenyl C61 butyric acid methyl ester (PCBM). These molecular compositions have not been studied well and are promising for molecular electronics of natural materials, in particular, for organic solar cells. The novelty of this work relates to the study of photoluminescence spectra obtained for these molecular compositions and nanocomposites in various solvents (chloroform, acetonitrile, and toluene) as well as in a polystyrene matrix; these studies were carried out at various, in particular, liquid helium (4.2 K), temperatures. The obtained results allowed us to ascertain mechanisms of the state of aggregation and donor-acceptor interaction between melanin and PCBM

Keywords:photoluminescence, melanin, PCBM, C60, charge transfer state, time-resolved emission spectrum, donor-acceptor complex.

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