INVESTIGADORES
VAZQUEZ marcela Vivian
artículos
Título:
Electrodeposition of CuInSe2 on TiO2 substrates: In2Se3 as buffer layers on TiO2/CuInSe2 solar cells
Autor/es:
M. VALDES; M. VAZQUEZ; A. GOOSSENS
Revista:
ELECTROCHIMICA ACTA
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Año: 2008 vol. 54 p. 524 - 529
ISSN:
0013-4686
Resumen:
In2Se3 and CuInSe2 films have been prepared by potentiostatic electrodeposition from deareated aqueous solutions. The substrate consistedof a duplex layer of dense and nanoporous TiO2 obtainedby spraypyrolysis deposition (SPD) and doctor blading. In2Se3 thin films are electrodepositedin between the TiO2/CuInSe2 pn heterojunction to block the electron back flowand lower the interfacial recombination produced upon illumination. The films have been characterized using X-ray diffraction, Raman spectroscopy, scanning electron microscopy, and optical transmission. Annealing the samples in Se atmosphere is essential to improve the crystallinity of the In2Se3 and CuInSe2 films. The combination of TiO2/In2Se3/CuInSe2 shows very good diode behavior with a rectification ratio higher than 100 at ±1V.
