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RRJOMS | Volume 5 | Issue 4 | July, 2017
July 27-29, 2017 Vancouver, Canada
10
th
International Conference on
Emerging Materials and Nanotechnology
Res. Rev. J Mat. Sci. 2017
DOI: 10.4172/2321-6212-C1-003
Structural, optical and photoconductive properties of iso-coordinated
In
x
Sb
30−x
Se
70
chalcogenide films
Shaveta Sharma
1
, Rita Sharma, R Thangaraj
1
, M Mian
1
and
Praveen Kumar
2
1
Guru Nanak Dev University, India
2
DAV University, India
I
n this paper, we report the effect of in-addition on structural, optical and photoconductive properties of thermally
evaporated In
x
Sb
30−x
Se
70
chalcogenide films. The absence of sharp diffraction peaks in XRD pattern reveals the amorphous
state and nearly stoichiometric films with the bulk samples was confirmed by EDS spectroscopy. The Raman spectra reveals the
formation of chalcogen based Sb and in structural units, while the intensity of two bands at 189 and 252 cm
−1
due to Sb2Se3
structural units fades away with the appearance of new band 212 cm
−1
with the increase in indium content. The indirect optical
band gap and tailing parameter have been calculated from transmittance and reflectance data in spectral range of 200–1100
nm. The results are discussed based on average bond energies in the present system. The study of steady state and transient
photocurrent measurement provide important information about carrier generation and recombination phenomena in various
semiconducting systems for photo-sensor device applications. The initial rise of photocurrent sharply approaches a steady state
value during illumination and fast decay to a constant persistent current after stopping the illumination has been observed. The
decay of photocurrent has been fitted with stretched exponential function for different compositions along with at different
light intensities. These results are important for the development of low cost photo absorbers for solar cell applications and
visible region responsive photo sensor devices.
shaveta.sharma1987@yahoo.comPlasmonics in polymer and perovskite solar cells: Optical and electrical contribution
Sumei Huang
East China Normal University, China
S
olution processed thin-film photovoltaic (PV) solar technologies, such as polymer and perovskite solar cells (PSCs), may
provide low-cost electricity generation. These technologies suffer from insufficient light absorption due to thin absorbers.
Metallic nanoparticles (NPs) exhibit a localized surface plasmon resonance (LSPR) and act as scattering centers and sub-
wavelength antennas, so metallic NPs can be incorporated into thin-film solar cells to effectively improve the light absorption
of light harvesting devices. We have embedded various metallic nanocomposites into the electron transport layer (ETL) or
the hole transport layer (HTL) of polymer and perovskite solar cells to investigate the photovoltaic effects of the PV cells with
metallic nanostructures. The PSC device achieved a significant enhancement of the UV stability and 34.2% improvement of
the power conversion efficiency (PCE) by combinational use of Au NPs and insulating MgO in mesoporous TiO
2
. The polymer
PV device demonstrated improved stability and 14.5% improvement of PCE by embedding AgAl nanostructures into the HTL.
Solar cell performance observations and results indicate that the LSPR and electrical effects of metallic nanostructures enhance
the photovoltaic response of both kinds of PV cells, by causing an incredible improvement in the photocurrent density as a
dominant factor. The fundamental optics and physics behind the plasmonic polymer and perovskite solar cell was studied
smhuang@phy.ecnu.edu.cn