Page 14 - JCERDC Status Report

Achievements thus far

SUSTAINABLE PHOTOVOLTAICS • Two new Organic Photovoltaic (OPV)
• A 6.5 % Copper Zinc Tin Sulfide (CZTS) materials with absorption >650 nm have
solar cell on flexible Willow® glass from been designed at NREL and synthesized
Corning has been achieved; Phase pure at IISc.; a >4% OPV module has also been
CZTS has been achieved on fluorine- developed. Work has focused in the last 6
doped Tin Oxide (FTO) and Molybdenum months on OPV on flexible Willow® glass,
(Mo) coated glass substrates; Single phase attaining 5.67% on based OPV cells at
copper indium gallium selenide (CIGS) films Solarmer, and 2.8% at IISc.
has been achieved via electro deposition; • Dye-Sensitized Solar Cells (DSSC) with 8%
Phase purity was achieved by optimizing the efficiency have been fabricated as reported
annealing conditions. Devices being made/ earlier. Si nanowire fabrication has been
in process of testing; 8.0% (7% average) standardized and fabrication of preliminary
CIGS nanoparticle based solar cell has Si nanowire based solar cells initiated.
been fabricated on flexible Corning Willow® During the last 6 months, Niobium (Nb) doped
glass. This efficiency has been achieved by titania has been synthesized by aerosol
rapid thermal processing of the coated CIGS synthesis; the effect of multiple sintering,
nanoparticle film in selenium. During the which helps DSSC cell performance has
last 6 months, work on aqueous dispersion been studied; thylakoid sensitized DSSC
processed Copper Zinc Tin Sulfide-Selenide cells were fabricated and a 3X enhancement
(CZTSSe) solar cells has yielded a 4.1% in photocurrent was observed with respect to
device.

14 Indo-U.S. Joint Clean Energy Research and Development Center