Microstructural and optical properties of CSS and CBD-CdS thin films for photovoltaic solar cells

• Autor(a) principal: Cruz,Leila Rosa
• Data de Publicação: 2014
• Outros Autores: Fernandes,José Antônio Sousa, Ferreira,Carlos Luiz, Pinheiro,Wagner Anacleto
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Matéria (Rio de Janeiro. Online)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-70762014000300228
• topic: CdS thin films; CBD deposition; CSS deposition; microstructure; optical properties

This work compares the properties of CdS films deposited by CBD and CSS techniques. The influence of the deposition parameters on the properties of the films was investigated. The thickness of CBD films ranged from 80 to 100nm and was affected by the concentration of reactants in the solution. For CSS films, the thickness was controlled in the 100-300nm range, being strongly influenced by the source/substrate temperatures and pressure. Grain size in CSS films was larger than in CBD films. Transmittance of CBD and CSS films ranged from 80 to 90%, but the band gap in CSS films was narrower than in CBD films, which means that CSS films transmit less of the blue part of the solar spectrum than CBD films. However, the growth of CdS films by CSS technique may be advantageous because the CdS/CdTe device could be fully manufactured in the same system.