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Revista mexicana de física

versión impresa ISSN 0035-001X

Resumen

MENDOZA-PEREZ, R.; AGUILAR HERNANDEZ, J.; CONTRERAS-PUENTE, G.  y  SASTRE-HERNANDEZ, J.. Estudio comparativo de la degradación de celdas solares de CdTe con CdS procesado por CBD y CSVT. Rev. mex. fis. [online]. 2012, vol.58, n.5, pp.397-403. ISSN 0035-001X.

In this work we presented a comparative study of the degradation of thin films solar cells of CdS/CdTe, with the Cadmium Sulfide (CdS) deposited by Chemical Bath Deposition (CdS-CBD) and Closed Space Vapor Transport (CdS-CSVT) techniques, in both cases the Cadmium Telluride (CdTe) thin film was deposited by CSVT and both the CdS and CdTe were submitted at the same heat treatment (TT) with Cadmium Chloride (CdCl2). In the CdS-CBD solar cells, the CdS was deposited at different relations of sulfur with respect to cadmium (S/Cd) in chemical bath; wherever the CdS-CSVT solar cells, the CdS was deposited at different times for obtained the similar thickness to CdS-CBD solar cells. The initial photovoltaic efficiency of the best CdS-CBD solar cells was 12.3% for the sample with relation S/Cd=5:1 and the initial photovoltaic efficiency of the best CdS-CSVT solar cells was 11.2% for CdS sample with the thickness of 140 nm before TT-CdCl2. The solar cells CdS-CDB and CdS-CSVT obtained 6 years ago were characterization regularly by optical transmittance, photoluminescence, spectral quantum efficiency (QE) and current function voltage (I vs. V); the measurements shows the degradation in these photovoltaic devices submitted at exposed to the weather.

Palabras llave : Solar cells; CdS/CdTe; degradation; photovoltaic efficiency.

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