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ElectPropOIPC Report Summary

Project ID: 622653
Funded under: FP7-PEOPLE
Country: Israel

Periodic Report Summary 1 - ELECTPROPOIPC (Atomically thin layers of Organic-Inorganic Perovskite Crystals – Electronic Properties and Application in Solar Cells)

The proposed research is aimed to utilize the recently developed cutting-edge experimental methods of studying exfoliated atomically thin layers to explore the unique properties of ultrathin organic inorganic perovskite crystals (OIPCs).
The project goals are to introduce OIPC as a new family of materials for Van der Waals heterostructures and study their electronic and excitonic properties.
Since the beginning of the project, the OIPCs were synthesized, exfoliated and there excitonic and structural properties were studied in detail and electrical contacts were deposited on a single layer using e beam lithography . Two full articles were published on the subject in Physical Reviews B (DOI: 10.1103/PhysRevB.92.045414) and the Journal of American Chemical Society (DOI: 10.1021/ja512833n). As work progressed, it became increasingly clear that the mechanical stability and chemical homogeneity of the n=2 and 3 OIPC exfoliated layers is low and the projected deviated to study the structural dynamic of these crystals using, primarily, terahertz (THz) range, Raman spectroscopy. A first manuscript on the subject is now completed and is available on arXiv (arXiv:1604.08107).
From career development standpoint, I gained experience in a wide range of spectroscopic methods including state-of-the-art THz range Raman microspectroscopy that allowed me to obtain a permanent position as a tenure track senior researcher in the Weizmann institute which will begin immediately after the completion of the project.
Main results include the demonstration, for the first time, of exfoliation and isolation of perovskite single layers as well as a detailed study of the layers excitonic properties. The results also include a comprehensive study of the unique structural dynamics of these materials using, THz domain Raman scattering.
The expected final result is to obtain fundamental understanding of the correlation between the electronic properties and structural dynamics of OIPCs. This may result in set of design rules for 2D based OIPC heterostructures for photovoltaic and light emitting diode applications application. The development of inexpensive photovoltaic cell based on earth abundant materials is imperative for global reduction of CO2 emission caused by energy consumption.


Mark Davison, (EC Programme Coordinator)
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Life Sciences
Record Number: 189002 / Last updated on: 2016-09-19