Hybrid solar cells based on a combination of conductive polymer poly (3,4-ethylenedioxyth1ophene) (PEDOT) doped
with polystyrenesulfonate (PSS) and inorganic semiconductor CuIn(S,Se)2 (CISSe) were investigated. The CuInSe2
(CISe) absorber layers were electrodeposited on IT0 covered glasses from aqueous solutions with various ratios of
elements. The ITO/In(O,S)/CISSe photovoltaic (PV) junctions were prepared by the sulfurization of ITO/CISe
precursors at 450 °C in the H2S atmosphere. A PEDOT-PSS layer of p-type is considered as an alternative for the
traditional window top layer on the CISSe absorber layer in the cell structure. The polymer deposition was performed
using spin-casting technique. The PV properties of the prepared ITO/In(O,S)/CISSe and ITO/In(O,S)/CISSe/PEDOT-
PSS structures were investigated, with special attention paid to the role of the conductive polymer layer in the cell
structure.
In the Department of Materials Science of the Tallinn University of Technology, an EU project with the same title as the
present communication is carried out. The aim of this paper is to summarize the results of the research and development
of the different materials and polycrystalline solar cells obtained within the project. The topics addressed are:
photoluminescence of different ternary compounds, thin films and thin film structures by different chemical methods,
photovoltaic structures based on electrically conductive polymers and copper-indium-chalcogenide materials,
monograin powders with a tailored composition and structure, and the technology of monograin layer solar cells.
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