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Environmental Science & Technology 2018
Journal of Environmental Research
Page 20
March 29-31, 2018
Vienna, Austria
4
th
Edition of International Conference on
Environmental Science
& Technology 2018
L
ead-free organic-inorganic tin halide perovskites were
prepared and investigated by a rapid screening technique
utilizing a modi ed scanning electrochemical microscope
(SECM). We studied liquid junction photoelectrochemical (PEC)
cells based on p-type methylammonium tin halide (MASnI
3-
x
Br
x
) perovskites employing the benzoquinone (BQ) redox
couple, BQ/BQ•–, in dichloromethane (CH
2
Cl
2
). We found that
the optimized Sn-based mixed halide perovskite, MASnI
0.5
Br
2.5
,
exhibits enhanced performance and stability in liquid-junction
PEC cells, with a power conversion efficiency of 1.51% (an
increase of 20.8%) and a photovoltaic lifetime of 175 min (an
increase of 75.0%), in comparison to MASnI3 perovskites.
Recent Publications
1. H-Y Hsu, L Ji, H S Ahn, J Zhao, E T Yu and A J Bard
(2015) A liquid junction photoelectrochemical solar
cells based on p-Type MeNH
3
PbI
3
perovskite with 1.05
V open-circuit photo voltage. Journal of the American
Chemical Society 137(46):14758–14764.
2. H-Y Hsu, L Ji, M Du, J Zhao, E T Yu and A J Bard
(2016) Optimization of lead-free organic–inorganic
tin (II) halide perovskite semiconductors by scanning
electrochemical microscopy. Electrochimica Acta
220:205–210.
3. H H-Y Hsu, L Ji, M Du, J Zhao, E T Yu and A J Bard
(2016) Optimization of PbI
2
/MeNH
3
PbI
3
perovskite
composites by scanning electro- chemical microscopy.
Journal of Physical Chemistry C 120:19890–19895.
4. H-Y Hsu, J H Vella, J D Myers, J Xue and K S Schanze
(2014) Triplet exciton diffusion in platinum polyyne
films. Journal of Physical Chemistry C 118:4282–
24289.
Biography
Sam H Y Hsu has obtained his PhD degree under supervision of Professor
Kirk S Schanze at University of Florida. After that, he received the two-year
Postdoctoral and Research Associate’s appointments respectively with Pro-
fessor Allen J Bard and Professor Edward T Yu in Center for Electrochemis-
try and Department of Electrical and Computer Engineering at University of
Texas at Austin. His research interests involve the material design, synthe-
sis, processing, imaging, spectroscopy and solar energy application, aim-
ing to explore fundamental properties and interactions of hybrid perovskite
semiconductors and functional metallopolymer materials for developing ef-
ficient solar energy conversion processes. He has keen interests in photoin-
duced charge transfer processes, interfacial electron transfer, electrochem-
ical hydrogen generation, and photoredox reactions for photovoltaics and
solar fuel production. The investigations between material phenomena rely
heavily on concepts and techniques of material and physical engineering,
consisting of photophysics, electrochemistry, photo electrochemistry, scan-
ning electrochemical microscopy and time-resolved photoluminescence
spectra.
samhyhsu@gmail.comHybrid perovskite solar cells
Sam H Y Hsu, Chengxi Zhang, Chun Hong Mak
and
Rugeng Liu
University of Hong Kong, Hong Kong
Sam H Y Hsu et al., J Environ Res, Volume 2