Abstracts Book - IMRC 2018

• SC4-P120
DEVELOPMENT OF THIN FILMS OF Cu2ZnSnS4 BY THERMAL CO-
EVAPORATION FOR APPLICATION AS AN ABSORBENT LAYER IN
SOLAR CELLS
Noé de la Cruz Santiago. 1 , Sergio Antonio López de Dios 2 , Cristino Ricardez Jimenez 1 , Omar
Sarracino Martinez 3
1
Universidad Juárez Autónoma de Tabasco, División Académica de Ciencias Básicas, Mexico.
2 Universidad Popular de la Chontalpa, , Mexico. 3 Universidad Juárez Autónoma de Tabasco, ,
Mexico.
The aim of this research is to develop thin films of Cu2ZnSnS4 (CZTS) in kesterite
phase to be applied as an absorbent layer in solar cells. Thin films were
deposited by thermal co-evaporation of precursors (binary sulfides: CuS, ZnS
and SnS) by stacking and controlling the stoichiometry by means of the mass of
such precursors. The structural, morphological, and optical properties of CZTS
films were studied utilizing different techniques. Optical studies indicate that the
band gap of energy of thin films tend to decrease in a range between 2.0 to 1.5
eV when they have Cu-poor and Zn-rich. Annealing was also carried out at
temperatures of 350, 400 and 450 ° C during 10 min. in sulfur atmosphere, finding
a systematic dependence with the increase of the temperature in the XRD. With
an improvement in the composition of the binary compounds and the
optimization of the processes performed in the deposits and annealing, we
obtained a thin film with a band gap value close to 1.5 eV, according to the
structural characteristic of CZTS with preferential orientation in the plane (112)
which indicates that this material presents an optimal value for its application
as absorber material.
Keywords: Co-evaporation, kesterite, annealing
Presenting authors email: noe.dlcs@yahoo.com.mx