Abstracts Book - IMRC 2018

• SB4-O002
SILICON QUANTUM DOTS EMBEDDED INTO ZNO MATRIX BY SOL-
GEL METHOD AS COATING FOR EFFICIENCY IMPROVEMENT FOR
SOLAR CELLS
Hiram Jesús Higuera Valenzuela 1 , Frank Romo Garcia 1 , Dagoberto Cabrera Germán 2 , Antonio
Ramos Carrazco 3 , Rodrigo Arturo Rosas Burgos 1 , Rafael Garcia Gutierrez 3 , Oscar Edel
Contreras 4 , Dainet Berman Mendoza 3
1 Universidad de Sonora, Departamento de Física, Mexico. 2 Universidad de Sonora,
Departamento de Investigación en Polímeros y Materiales, Mexico. 3 Universidad de Sonora,
Departamento de Investigación en Física, Mexico. 4 Universidad Nacional Autónoma de México,
Centro de Nanociencias y Nanotecnologia, Mexico.
At the present work, a novel two-stage method for the synthesis of zinc oxide
(ZnO) films with silicon quantum dots embedded (SiQDs-ZnO) is reported. The
experimental procedure consisting on ZnO matrix produced by the sol-gel
technique and silicon quantum dots (Si-QDs) synthetized by a green synthesis is
described. The incorporation of the Si-QDs on the ZnO films was obtained by
spin coating followed by a post-deposition air annealing at 400°C. The effect of
the tunable bandgap (Eg) of the ZnO with the addition of Si-QDs was obtained.
The enhancement of the photoluminescence (PL) of the ZnO films with the
increment of Si content is presented. A white light produced by the combined
emission of the transitions on the Near Band (NBE), Defects Band (DBE) and
Silicon Quantum Dots (SQDE) was observed. Incorporating the material as
coating shows an improvement in the solar cell efficiency.
Acknowledgment:
The authors express our thanks to the nanoFAB Laboratory for the use of its
facilities, to CeMIE-SOL for the use of characterization equipment, and CONACyT
for the scholarship No. 286850 and the basic science project No. 242508.
Keywords: Sol-Gel, Zinc Oxide, Silicon Quantum Dots
Presenting authors email: hjhiguera@correo.fisica.uson.mx