Abstracts Book - IMRC 2018

• SB4-O005
CDS THIN FILMS/CDS NPS BY SOFT CHEMISTRY METHODS FOR
TFTS APPLICATIONS
Laura Aislínn Carrasco Chávez 1 , Raúl Agustín Velarde Delgado 1 , María de la Luz Mota
González 1,2 , Francisco Servando Aguirre Tostado 3 , Manuel A. Quevedo López 4 , Amanda Carrillo
Castillo 1
1 Universidad Autónoma de Ciudad Juárez, Instituto de Ingeniería y Tecnología, Departamento
de Ingeniería Eléctrica y Computación, Mexico. 2 Consejo Nacional de Ciencia y Tecnologia -
CONACYT, Instituto de Ingeniería y Tecnología, Departamento de Ingeniería Eléctrica y
Computación, Mexico. 3 Centro de Investigación en Materiales Avanzados, S.C., Unidad
Monterrey, Mexico. 4 The University of Texas at Dallas, Departament of Electrical and Computer
Engineering, United States.
The challenge in the development of thin film transistors (TFTs) is to produce an
appropriate energy barrier between the source and drain contacts so that the
device can be turned off and at the same time generating a gate structure that
can effectively modulate the barrier and can turn on the transistor.
Chalcogenides as semiconductors have been studied as active layers in the
development of devices, in this case Cadmium Sulfide (CdS) as an active layer
has shown a good performance with channel mobility comparable to those of
amorphous silicon [1-4]. ], which is why it has been applied in the development
of TFTs over the last few years, the basic properties, such as its composition,
crystalline phase, morphology, orientation, thickness and microstructure, are
controlled by the deposit conditions and the method used, this results in unique
properties of a material product of a growth process [1- 2]. In this work, a study
was made of thin films of cadmium sulfide (CdS) with nanoparticles of the same
material as the active layer for further applications in the development of TFTs.
The thin film of CdS was deposited by chemical bath deposit, which is a relatively
simple manufacturing process and which handles low deposition temperatures,
layers were made to 1, 2 and 3 chemical baths; the CdS nanoparticles were
synthesized by the precipitation method, they were made at two different
concentrations of their surfactant agent, the SDS concentrations were varied as
sample ‘X’ 2.5 x 10 -3 M and sample ‘Z’ 10 x 10 -3 M. The inclusion of CdS
nanoparticles was performed using the spin coating technique, two series of
thin films of CdS with 1, 2 and 3 chemical baths were made, one layer of CdS X
nanoparticles was deposited and the other series a layer of CdS Z nanoparticles.
Optical properties of thin films of CdS/Nps CdS were analyzed by UV-Vis
spectroscopy; the surface morphology by scanning electron microscopy (SEM),