Dr. Rafi Shikler’s laboratory focuses on degradation studies of organic photovoltaics by correlation of device characteristics with chemical changes measured using Raman based techniques. I am also studying novel techniques for improving optical properties of organic solar cells based on transparent top cathodes and photonic structures.
Dr. Iris Visoly-Fisher’s laboratory has been studying single molecules in order to develop better design criteria for PV energy conversion and opto-electronic applications of such molecules, both macroscopic and in nanoscale energy supplying devices and photodetectors that can be used in portable, low-energy consuming electronics. This group is also working on novel high efficiency nanostructured PV devices and new molecular dyes for energy conversion.
Prof. Yuval Golan’s research group focuses on PV materials of (i) nanocrystalline films of solution-deposited PbS and PbSe and their solid solutions, and (ii) surfactant-assisted synthesis of nanocrystalline ZnS, ZnSe, CdS and PbS films. Some of these films were recently shown to exhibit strong quantum size effects and photoexcited carrier multiplication of up to 300%.
Dr. Taleb Mokari’s group has been developing new approaches to synthesize nanostructures via decomposition of single source precursors. They are focused on developing large scale, non-toxic and abundant based nanostructures, mainly metal sulfides and metal oxides. The developed materials have unique properties to be used as active materials in PV. For example, Cu2S has been shown to be a promising material due to the band gap energy and the carrier mobility.
Activities at the Ben-Gurion National Solar Energy Center at Sede-Boqer by Prof. Eugene Katz, Prof. Rachel Yerushalmi-Rozen and co-workers include PV characterization of fullerene/polymer solar cells and investigations of their stability under real operational conditions. In addition, major activities are directed towards highly efficient organic PV using carbon nanotubes as acceptors in the cell photoactive layer in an ongoing effort to fabricate solar cells from nano-carbon materials. The group is also engaged in characterization of inorganic PV characterization of multi-junction III-V concentrator solar cells under ultra-high flux of real sunlight.
Dr. Nurit Ashkenasy's group focuses on the development of bio-inspired materials for optoelectronic applications, specifically solar cells. Peptides (short protein segments) are specifically designed based on natural motifs, and are modified to include non-natural ligands that bear the optoelectronic activities. The materials that fold into nanometric structures will be used for the construction of new type of solar cell devices.
Dr. Arik Yochelis’ group focuses on (i) basic theory of pattern forming systems and (ii) applications related to complex renewable energy devices, e.g. bulk-heterogeneous solar cells and flow batteries. While emphasize is on dynamical systems and pattern formation we seek distinct physico-chemical models that often stimulated and obtained via empirical electrochemical studies (in house). As such the research that is conducted in the group is of multidisciplinary nature which allows students to proficient their own strengths and interests.
• Coupling between morphology and charge dynamics in organic solar cells;
• Solar Energy PV/Energy storage
• Vanadium redox flow batteries;
• Nonlinear dynamics in electrochemical systems;
• Forces extracted by heterogeneously charged surfaces;
• Foundations of a global bifurcation theory in spatially extended systems.