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O c t o b e r 1 9 - 2 0 , 2 0 1 8 | T o k y o , J a p a n
Materials Summit 2018 & Separation Summit 2018
Note:
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ADVANCED MATERIALS AND POLYMER SCIENCE
SEPARATION TECHNIQUES
&
International Conference on
International Conference and Expo on
Joint Event on
Materials Science and Nanotechnology | Volume 2
OF EXCELLENCE
IN INTERNATIONAL
MEETINGS
YEARS
Md Akhtaruzzaman, Mater Sci Nanotechnol 2018, Volume 2
MOLECULAR ENGINEERING AND
PROSPECTS OF ORGANIC DYES FOR
DYE-SENSITIZED SOLAR CELLS (DSSC)
T he dye-sensitized solar cells (DSCs) have gained popularity due to their
ease of fabrication, light weight, and capability for being processed
in ambient conditions. Although significant research has focused on the
improvement of DSSC performance, chemists, materials scientists and
engineers still face many challenges for practical realization of DSSCs in real
world application. Typically, a DSSC consists of a photoanode composed of
a dye monolayer adsorbed on mesoporous semiconductor oxide coated on a
transparent conducting substrate, an electrolyte and a counter electrode. The
dye plays a crucial role in designing efficient DSSCs as it should capture as
much incident light as possible by optimization of the absorption strength
(molar extinction coefficient) and overlap of the absorption with the solar
spectrum (i.e., the absorption spectral width). Simultaneously, the dye should
inject the photo generated electron into the semiconductor oxide. Until now, the
dyes (organic/metal complexes) in use have strong absorption in the UV-visible
region with power conversion efficiency (PCE) up to 13%. However, there have
been a few individual dyes identified that have panchromatic light harvesting
ability in near-infrared (NIR) region with the PCE <7%. So, the alternative
approach to capture the light over a wide range of absorption spectra by co-
sensitization using multiple dyes has been studied and verified with increased
light harvesting properties. Co-sensitization of multiple organic dyes which
contain maximum absorption in sensitive smaller parts of the visible region of
300-850nm is probable. The high molar extinction coefficients, easy structural
modification and facile synthesis process of metal free organic sensitizers
make them ideal candidates for designing co-sensitized DSSCs. Different
type of sensitizers and co-adsorbents have been designed, synthesized and
analyzed so far. This phenomenon will successfully enhance the efficiency of a
DSSC and create new pathways to obtain custom molecular engineered DSSC
for real life applications.
Biography
Md Akhtaruzzaman is an Assoc Professor at the So-
lar Energy Research Institute of The National Univer-
sity of Malaysia (Universiti Kebangsaan Malaysia),
where he is leading the organic-inorganic hybrid
solar cells unit at solar photovoltaics group. After
received his BSc in 1996 and MSc in 1998 in Applied
Chemistry and Chemical Engineering from The Uni-
versity of Dhaka, he has been awarded the Japa-
nese Government’s Monbukagakusho scholarship
and joined at the Institute for Molecular Science in
Okazaki, Japan where he obtained his PhD in March
2003. Thereafter, he worked in Japan for 12 years
(Tokyo Institute of Technology, Fujifilm Fine Chem-
icals Co. Ltd., and Tohoku University), King Saud
University in Saudi Arabia and University of Malaya
(UM) in Malaysia. He has published over 70 papers,
reviews in peer- reviewed journals, and patents, and
book chapters.
Md Akhtaruzzaman
Universiti Kebangsaan Malaysia, Malaysia