Abstracts Book - IMRC 2018

• SC4-P075
DISCUSSION OF THIN FILMS OF TIN SULFIDE DOPED WITH
COPPER BY ULTRASONIC SPRAY PYROLYSIS TECHNIQUE TO
APPLICATIONS IN PHOTOVOLTAIC DEVICES.
Sergio Rodriguez Castro 1 , Jorge Sergio Narro Rios 2 , German Escalante Notario 3 , Guillermo
Santana 4 , Aaron Sanchez Juarez 2 , Carlos Alvarez Macias 1,3
1
Instituto Tecnologico de la Laguna, Posgrade, Mexico. 2 Instituto de EnergÍas Renovables
Universidad Nacional Autónoma de México, Posgrade, Mexico. 3 Unidad Especializada en
Energias Renovables, Posgrade, Mexico. 4 Instituto de Investigaciones en Materiales, Posgrade,
Mexico.
Tin Sulfide (SnS) is a material with optoelectronic properties suitable for
photovoltaic applications due to is a semiconductor with positive electrical
conductivity and with a high absorption coefficient (>10 4 cm -1 ), also has low
levels of toxicity and is abundant in nature. However, the conductivity of this
material is low for optimal photovoltaic uses; therefore, copper doping is
proposed in order to improve its electrical properties. Tin Sulfide doped with
Copper (SnS:Cu) was deposited based on the Ultrasonic Spray Pyrolysis
technique (USP). The great advantages of use USP are that technique is relatively
simple and cheap; in addition, deposition can be accomplished in large areas for
continuous or semi-continuous processes. Hence, SnS thin films were obtained
and doped at different Cu ratios (undoped, 2, 5 and 10 %) by USP technique. The
influence of copper as a dopant agent in the obtained thin films was studied by
techniques like; SEM, XRD, UV-VIS and Hall-Van der Pauw to analyze their
morphological, structural, optical and electrical properties for solar cells
applications. Based on our results, we discuss the optimal USP deposition
parameters to propose SnS:Cu as an absorbent layer in a photovoltaic
structure.
Acknowledgment: Sergio Rodríguez thanks CONACYT for the scholarship with
CVU#740722, the Tecnológico Nacional de México for the financial support of
the project 6098.17-P, special thanks to Patricia Altuzar for XRD studies, project
LYFICS- CONACYT No 132122. We thank Francisco Alvarado for SEM studies,
project SENER- CONACYT No 263043.
Keywords: Tin Sulfide, Ultrasonic Spray Pyrolysis, Solar Cells
Presenting authors email: Sergio_rc18@hotmail.com