Electrochemical synthesis of CuIn(S,Se)2 alloys with graded composition for high efficiency solar cells

Izquierdo-Roca, V.; Fontané, X.; Álvarez-Garcia, J.; Calvo-Barrio, L.; Pérez-Rodríguez, A.; Morante, J. R.; Ruiz, C. M.; Saucedo, E.; Bermúdez, V.
February 2009
Applied Physics Letters;2/9/2009, Vol. 94 Issue 6, pN.PAG
Academic Journal
This work reports the electrochemical synthesis and characterization of CuIn(S,Se)2 layers with graded composition from a S-rich surface region toward a Se-rich back region. The process includes the single step electrodeposition of a CuInSe2 precursor followed by a sulfurization step. Cross-sectional Raman microprobe measurements have allowed to characterize the complex graded structure of the layers. These data have been correlated with in-depth Auger electron spectroscopy and x-ray diffraction. Preliminary simulations of solar cells with different kinds of absorbers corroborate the potential of these complex graded layers for the development of low cost high efficiency devices.


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