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In this work, we present experimental studies of two earth abundant thin film solar cell materials: Cu2ZnxFe1-xSnS4 and Zn(S,O). Cu2ZnxFe1-xSnS4 and Zn(S,O) are among the most promising candidates to substitute CIGS and CdS as aborber and buffer layers, respectively, in thin film solar cells. Using different characterization techniques such as UV-Vis-NIR spectroscopy, X-ray diffraction, atomic force microscopy, we demonstrate that both materials exhibit structural, morphological and optical properties that are suitable for solar cell applications. The optical constants of the films were calculated from the analysis of the transmittance and reflectance data in the spectral range 300-1800 nm. The band gap energy of both materials varied from 1.10 to 1.55 eV and from 3.27 to 3.08 eV depending on the sulphur and zinc content, respectively. X-ray diffraction patterns show that all Cu2ZnxFe1-xSnS4 and Zn(S,O) films were polycrystalline in nature with a preferential growth along (112) and (002) planes, respectively.
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Alexander Bagaturyants is chief researcher at Photochemistry Center of the Russian Academy of Sciences. He was graduated from D.I. Mendeleev Institute of Chemical Technology, Moscow, Russia in 1962, obtained his PhD degree, Dr. Sci. degree, and the academic title of professor in 1968, 1987, and 1992, respectively, all in physical chemistry. His main research interests are in the field of atomistic multiscale simulations of organic functional materials, quantum chemistry, quantum-chemical calculations of excited states in molecules and molecular complexes. Alexander Bagaturyants is the author of more than 200 research papers and two monographs.
I am a passionate science communicator and have given presentations to audiences ranging from 6 to 85 years of age using different media/settings such as radio, newspapers, schools, science clubs and community groups about topics ranging from nuclear power to nanotechnology.I have spoken for example about nanotechnology or energetic materials to the Sydney Morning Herald and The West Australian as well as the ABC in Adelaide, Darwin and Sydney. When talking to the general pubic,I explain in layman's words the value and relevance of science and its importance to society. When addressing school students, the message is the same with the added point that science is fun, interesting and can be a fulfilling career.I believe that as our society becomes more technologically advanced, that it is critical that people have a basic understanding of science to appreciate their world and to be able to make informed judgements on what they think are reasonable advances and those that are best left alone.
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Capitalism vs. the Climate | The Nation
The Ph.D. is a research-intensive degree that prepares students for a research and development career in industry or academia. Given the research focus of the Ph.D., applicants must have a deep affinity for their research topic and be fully committed to completing their degree and contributing to their discipline.