Title :
Comparative study of ZnS thin films deposited by CBD and coevaporation
Author :
Romero, E. ; Vallejo, W. ; Gordillo, G.
Author_Institution :
Departamento de QuÃ\xadmica, Universidad Nacional de Colombia, Colombia
Abstract :
A comparative study was carried out of ZnS(O,OH) thin films deposited from chemical bath containing thiourea, zinc acetate, ammonia and sodium citrate, and ZnS films prepared by co-evaporation of Zn and elemental sulphur. ZnS is an environmentally friendly material with a wide band gap (Eg =3.7 eV) compared to CdS (2.4 eV), which is conventionally used as buffer layer in chalcopyrite based solar cells. Suitable conditions for reproducible deposition of good quality ZnS(O,OH) and ZnS thin films have been determined. The samples were investigated by UV-VIS spectrophotometry, X-ray diffraction and AFM microscopy. The effects of growth method and synthesis parameters on optical, structural and morphological properties of the ZnS thin films have been studied.
Keywords :
Atomic force microscopy; Buffer layers; Chemical elements; Optical diffraction; Optical films; Photovoltaic cells; Sputtering; Wideband; X-ray diffraction; Zinc compounds;
Conference_Titel :
Photovoltaic Specialists Conference, 2008. PVSC '08. 33rd IEEE
Conference_Location :
San Diego, CA, USA
Print_ISBN :
978-1-4244-1640-0
Electronic_ISBN :
0160-8371
DOI :
10.1109/PVSC.2008.4922880
