Abstracts Book - IMRC 2018

• SC4-P051
FORMATION OF CuSb(S,Se)2 BY THE SELENIZATION OF
ELECTRODEPOSITED Sb2S3/Cu STACK
Edgar Alexander Rueda Perez 1 , Rocio Guadalupe Avilez Garcia 2 , Tenoch Gonzalez Sanchez 1 ,
Mou Pal 3 , Nini Rose Mathews 1
1
Instituto de EnergÍas Renovables Universidad Nacional Autónoma de México, Materiales
Solares, Mexico. 2 Centro de Investigación en Dispositivos Semiconductores, Centro de
Investigación en Dispositivos Semiconductores, Mexico. 3 Instituto de Física BUAP, Instituto de
Física BUAP, Mexico.
CuSbS2 and CuSbSe2 are promising absorber materials for thin film solar cells
due to their direct band gap of 1.1-1.5 eV, high absorption coefficient 10 5 cm −1 ,
p-type conductivity and earth-abundant constituent elements. In this work we
study the formation of CuSb(S,Se)2 by the selinization of electrodeposited
Sb2S3/Cu layer. The deposition was carried out in two steps. First, Sb2S3 thin films
were electrodeposited on F doped SnO2 glass substrates from a bath containing
SbCl3 solution and Na2S2O3. Sb2S3 films were deposited by pulse
electrodeposition applying potentials of -0.72V and 0.1V vs saturated calomel
electrode (SCE). In the second step, Cu films were deposited from a bath of CuCl2
at a constant applied potential of -0.72 V vs SCE. Uniform films were obtained
and the final thickness was about 350 nm. Selenization of Sb2S3/Cu layer was
carried out at 325 o C for 30min at a pressure of 1bar with different concentration
of Se (5mg, 10mg, 15mg, 20mg and 25mg). The films were characterized using
different characterization techniques such as XRD, Raman spectroscopy SEM,
EDX, and XPS. The films showed dominant chalcostibite phase with band gap of
~1.2 eV and showed Raman active modes, Ag (155 cm -1 190 cm -1 , 228 cm -1 ) and
337 cm -1 .
Acknowledgment:
This work is part of the project PAPIIT IN104518. This work used some of the
experimental facilities acquired through the projects PAPIIT-UNAM, IN102718,
CeMIE-Sol 207450/P26 and P28 and has collateral contribution to these projects.
Keywords: CuSb(S,Se)2, selenization, electrodeposited
Presenting authors email: tegos@ier.unam.mx