Abstracts Book - IMRC 2018

• SC4-P086
CHEMICAL DEPOSITION OF Co +2 DOPED FeS2 THIN FILMS WITH
FERROMAGNETIC PROPERTIES FOR PHOTOVOLTAIC SYSTEMS.
Eder Cedeño 1 , Yolanda Peña 1 , Idalia Gómez 1
1 Universidad Autónoma de Nuevo León, Facultad de Ciencias Químicas, Mexico.
Harnessing the sun’s energy to produce electricity has proven to be one of the
most promising solutions to the world’s energy crisis. However, the device to
convert sunlight to electricity, a solar cell, must be reliable and cost effective in
order to compete with conventional sources.
On the basis of material extraction costs leading to significantly lower cost per
kilowatt-hour, FeS2 is one of the most promising material for photovoltaic
applications. In addition, Iron pyrite (Cubic FeS2) has suitable properties as an
appropriate band gap (Eg≈ 0.95 eV) and very strong light absorption ( a > 10 5 cm -
1
for hn > 1.3 eV) for scalable thin films solar cells.
In the present work, Co +2 doped Iron pyrite thin films were deposited on glass
substrates through chemical bath deposition technique (CBD). Co compositions
were 1 to 5 mole %. These thin films were thermal treated at 250 °C in a high
vacuum oven (6 x10 -3 Torr). The characterization of heat-treated thin films by X-
ray diffraction (XRD) showed the presence of the cubic phase of FeS2. Surface
profilometry characterization displayed a thickness value between 200-450 nm.
The band gap energy Eg was also calculated as 1-1.3 eV. Finally, conductivity was
obtained in the interval of 10 -3 - 0.5 W -1 cm -1 .
Keywords: photovoltaic systems, iron pyrite, chemical bath deposition
Presenting authors email: emcm729@gmail.com