Growth and characterization of Cu2ZnSn(S,Se)(4) thin films for solar cells

• Tipo: Artigo em Revista Científica Internacional
• Data: 2012

Autores

Salome, PMP (Autor) Outra; Malaquias, J (Autor) Outra; Ferreira, MS (Autor) Outra; da Cunha, AF (Autor) Outra; Leitao, JP (Autor) Outra; Gonzalez, JC (Autor) Outra; Matinaga, FM (Autor) Outra

Revista

Título: Solar Energy Materials and Solar Cells

Vol. 101

Páginas: 147-153

ISSN: 0927-0248

Editora: Elsevier

Indexação

ISI Web of Knowledge - 100 Citações

Scopus - 100 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia do ambiente

Outras Informações

ID Authenticus: P-002-9SV

DOI: 10.1016/j.solmat.2012.02.031

Abstract (EN): Cu2ZnSnS4 (CZTS) and Cu2ZnSnSe4 (CZTSe) with their band gap energies around 1.45 eV and 1.0 eV, respectively, can be used as the absorber layer in thin film solar cells. By using a mixture of both compounds, Cu2ZnSn(S,Se)(4) (CZTSSe), a band gap tuning may be possible. The latter material has already shown promising results such as solar cell efficiencies up to 10.1%. In this work. CZTSSe thin films were grown in order to study its structure and to establish the best growth precursors. SEM micrographs reveal an open columnar structure for most samples and EDS composition profiling of the cross sections show different selenium gradients. X-ray diffractograms show different shifts of the kesterite/stannite (1 1 2) peak, which indicate the presence of CZTSSe. From Raman scattering analysis, it was concluded that all samples had traces of CZTS and CZTSSe. The composition of the CZTSSe layer was estimated using X-ray diffraction and Raman scattering and both results were compared. It was concluded that Se diffused more easily in precursors with ternary Cu-Sn-S phases and metallic Zn than in precursors with ZnS and/or CZTS already formed. It was also showed that a combination of X-ray diffraction and Raman scattering can be used to estimate the ratio of S per Se in CZTSSe samples.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7