Flexible Solar Cells based on Copper Tape: Hybrid Organic-Inorganic Structures

S. Bereznev, J. Kois, E. Mellikov, and A. Öpik (Estonia)


Solar Cells, Energy Conversion and Conservation, CIS


Hybrid CISCuT solar cells on the basis of multilayer Cu In-S (CIS) photoabsorber on Cu-tape in combination with organic buffer layers of Zn-phthalocyanine (ZnPc) and poly(3,4-ethylenedioxythiophene) (PEDOT) doped with polystyrenesulfonate (PSS) were prepared using vacuum evaporation and spin-casting techniques. In order to prepare solar cells with active area of 0.56 cm2 , the appropriate deposition parameters and thickness of ZnPc and PEDOT layers were selected experimentally. For preparation of semitransparent chromium-golden contact window layers, chromium and gold were evaporated on the surface of ZnPc and PEDOT-PSS films. It was found, that intermediate chromium layer improves PV properties for the structures with organic buffer layers. The best structure with PEDOT-PSS buffer layer showed an open circuit voltage of 480 mV, a short-circuit current density of 14.8 mA/cm2 and a photoconversion efficiency of 2.15 % under white light illumination with an intensity of 100 mW/cm2 .

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