The effect of deposition of various polymer layers and annealing in the air at different temperatures on the surface photovoltage of CuInS2 photoabsorber films was studied. After polymer layer deposition onto the polycrystalline CuInS2 surface, roughness and photovoltage somewhat decreased. The photovoltage decrease is greater for polymers with smaller flexibility of macromolecules and can be caused by the formation of micropores in polymer films. After thermal annealing close to the polymer glass transition temperature micropores disappeared and photovoltage increased. Photovoltage increase was higher in the structures with the functional layer of polymers having larger flexibility of macromolecules.
1. Catalano, A. Polycrystalline thin-film technologies: status and prospects. In Proceedings of the 1st IEEE World Conference on Photovoltaic Energy Conversion (Hawaii), 1994, 52–59.
2. Schock, H. W. Solar cells based on CuInSe2 and related compounds: recent progress in Europe. Sol. Energy Mater. Sol. Cells, 1994, 34, 19–26.
doi:10.1016/0927-0248(94)90020-5
3. Miles, R. W., Zoppi, G., and Forbes, I. Inorganic photovoltaic cells. Mater. Today, 2007, 10, 11, 20–27.
doi:10.1016/S1369-7021(07)70275-4
4. Shah, A., Torres, P., Tscharner, R., Wyrsch, N., and Keppner, H. Photovoltaic technology: the case for thin-film solar cells. Science, 1999, 285, 692–698.
doi:10.1126/science.285.5428.692
5. Verbitsky, A., Vertsimakha, Ya., Lutsyk, P., Studzinsky, S., Bereznev, S., and Kois, J. Properties of CuInS2 free surface and effect of organic layers. Semiconductors, 2006, 40, 197–201.
doi:10.1134/S1063782606020163
6. Verbitsky, A., Vertsimakha, Ya., Lutsyk, P., Studzinsky, S., Bereznev, S., Kois, J., Öpik, A., and Mellikov, E. Properties of CuInS2 free surface and effect of conductive polymer layers on these properties. Proc. Estonian Acad. Sci. Chem., 2006, 55, 111–119.
7. Kargin, V. A. (ed.). The Encyclopedia of Polymers (3 volumes). Soviet Encyclopedia, Moscow, 1972–1977. (Vol. 1. – 1972, Vol. 2 – 1974, Vol. 3 – 1977) (in Russian).
8. Penndorf, J., Winkler, M., Tober, O., Röser, D., and Jacobs, K. CuInS2 thin film formation on a Cu tape substrate for photovoltaic application. Sol. Energy Mater. Sol. Cells, 1998, 53, 285–298.
doi:10.1016/S0927-0248(98)00018-X
9. Lipatov, Yu. S. (ed.). The Handbook of Polymers Physical Chemistry (3 volumes). Naukova Dumka, Kiev, 1984 (in Russian).
10. Dmitruk, N. L., Kruchenko, Yu. V., Litovchenko, V. G., and Popov, V. G. Surface photovoltage in semiconductors at deviation from quasi-equilibrium. Poverkhnost¢ Fiz., khim., mekh., 1986, 5, 56–62 (in Russian).
