RESEARCH GROUP TEACHING
While commercial Si-based solar cells have recently
reached near grid-parity in terms of cost/ Watt, the use of solar energy as a
renewable, environmentally friendly energy source is still limited. To broaden
this use, the development of extremely low-cost devices, which can also be used
off-grid and for niche applications such as building integrated photovoltaics
and disposable energy sources, is desirable. The challenges en route to such
developments include developing
novel device configurations which can be deposited using simple methods such as
wet processing at room temperature, eliminating the need for high vacuum, clean
rooms and high temperature processes, and long-term
device stability, which requires understanding the destabilizing factors. Our research focuses on developing
low-cost photovoltaic devices via wet processing of organic and
inorganic materials using novel deposition and characterization methods.
Research projects in
the lab include:
1. Developing miniaturized optoelectronic energy sources and photo-sensors, based on monolayers
of photoactive molecules, to be utilized
as on-chip energy sources for disposable bio-sensors and information-gathering
sensors for military applications. 2. Semiconductor-sensitized
solar cells for IR absorption, based on wet-chemistry deposited bulk- and
nanoparticle absorbers, 3. Accelerated stability studies of organic PV
materials and devices using concentrated sunlight, aimed at rapid screening of the stability of organic PV
materials, and detailed understanding of their degradation mechanisms,
the effect of the ordered electric double layer in ionic liquids on the electrochemical
charge transfer and transport, for applications in fuel cells and energy
storage in batteries.
5. Optimizing the performance of hematite photoelectrodes
for the production of solar fuels by water oxidation, via engineering of
structural and spatiotemporal heterogeneities.
- S. Nabha-Barnea,
N. Maman, I. Visoly-Fisher, R. Shikler, Microscopic
Investigation of Degradation Processes in a Polyfluorene Blend by Near-Field
Scanning Optical Microscopy, Macromolecules 49 (2016) 6439–6444.
- R. K. Misra,
L. Ciammaruchi, S. Aharon, D. Mogilyansky,
L. Etgar, I.
Visoly-Fisher, E. K. Katz, Effect of halide
composition on the photochemical stability of perovskite photovoltaic materials,
invited communication, ChemSusChem 9 (2016), 2572 – 2577.
- R. K. Misra, S. Aharon, B. Li, D. Mogilyanski,
I. Visoly-Fisher, L. Etgar,
Katz, Temperature- and
component-dependent degradation of perovskite
photovoltaic materials under concentrated sunlight, J. Phys. Chem. Lett. 6 (2015), 326−330.
- A. Yochelis, M. B. Singh, I. Visoly-Fisher, Coupling
bulk and near-electrode interfacial nano-structuring
in ionic liquids, invited perspective, Chem. Mater. 27 (2015),
- Ronen Gertman, Adi Harush, Iris Visoly-Fisher, Nanostructured Photocathodes for
Infrared Photodetectors and Photovoltaics,
J. Phys. Chem. C 119 (2015), 1683–1689.
- I. Visoly-Fisher, A. Mescheloff,
M. Gabay, C. Bounioux,
L. Zeiri, M. Sansotera,
A. E. Goryachev, A. Braun, Y. Galagan, E.A. Katz, Concentrated sunlight for
accelerated stability testing of organic photovoltaic materials: Towards
decoupling light intensity and temperature, Sol. Ener. Mater. & Sol. Cells 134 (2015), 99–107.
- R. Gertman, Y. Berger, I. Visoly-Fisher,
Pulsed electrodeposition of CuSCN for superfilling of ZnO nanowire array electrodes, Electrochimica
Acta 125 (2014), 65-70.
- S. Sergani, Y. Furmansky, I. Visoly-Fisher, Metal-free
molecular junctions on ITO via amino-silane binding - toward
optoelectronic molecular junctions, Nanotechnology 24 (2013) 455204.
- D. Gerster, J. Reichert, H. Bi, J. V. Barth, S. M.
Kaniber, A. W. Holleitner, I. Visoly-Fisher, S. Sergani, I. Carmeli, Photocurrent of a
single photosynthetic protein, Nature Nano. 7 (2012), 673–676.
- Y. Furmansky, H. Sasson, P. Liddel, D. Gust, N.
Ashkenasy, I. Visoly-Fisher,
Porphyrins as ITO photosensitizers: Substituents control photo-induced
electron transfer direction, J.
Mater. Chem. 22 (2012), 20334.
- I. Visoly-Fisher, K. Daie, Y. Terazono, C. Herrero, F. Fungo, L. Otero, E. Durantini,
J. J. Silber, L. Sereno, D. Gust, T. A. Moore,
A. L. Moore, S. M. Lindsay, Conductance of a biomolecular wire, PNAS 103 (2006) 8686-90.
- I. Visoly-Fisher, S. R. Cohen, K. Gartsman,
A. Ruzin, D. Cahen, Understanding
the Beneficial Role of Grain Boundaries in Polycrystalline Solar Cells
from Single Grain Boundary Scanning Probe Microscopy, Adv. Funct. Mater. 16 (2006)
- I. Visoly-Fisher, S. R. Cohen, A. Ruzin,
D. Cahen, How polycrystalline devices can
out-perform single crystal ones: thin film CdTe/CdS solar cells, Adv. Mater. 16
- I. Visoly-Fisher, K. D. Dobson, J. Nair, E. Bezalel, G. Hodes, D. Cahen,
Factors Affecting the Stability of CdTe/CdS Solar Cells, Deduced from Stress Tests at Elevated
Temperature, Adv. Funct. Mater. 13 (2003) 289-99.
- K. D.
Dobson, I. Visoly-Fisher, G. Hodes, D. Cahen, Stability of CdTe/CdS Thin-Film Solar Cells (review paper), Sol.
Energy Mater. Sol. Cells 62 (2000) 295-325.