Picture of athlete cycling

Open Access research with a real impact on health...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by Strathclyde researchers, including by researchers from the Physical Activity for Health Group based within the School of Psychological Sciences & Health. Research here seeks to better understand how and why physical activity improves health, gain a better understanding of the amount, intensity, and type of physical activity needed for health benefits, and evaluate the effect of interventions to promote physical activity.

Explore open research content by Physical Activity for Health...

Photoreflectance study of AgGaTe2 single crystals

Raadik, T. and Krustok, J. and Yakushev, M. V. (2011) Photoreflectance study of AgGaTe2 single crystals. Physica B: Condensed Matter, 406 (3). pp. 418-420. ISSN 0921-4526

Full text not available in this repository. Request a copy from the Strathclyde author

Abstract

The optical properties of ternary chalcopyrite AgGaTe2 were studied by photoreflectance spectorscopy (PR). Due to the optimal direct energy gap and high absorption coefficient AgGaTe2 is a promising material for solar energy conversion. Single crystals used in this work were grown by the vertical Bridgman technique. The PR temperature dependent spectra were measured in the range of 25–300 K. At room temperature two energy gaps in AgGaTe2 were detected: and , with temperature coefficients /dT=−2.1×10−4 eV/K and /dT=−3.4×10−4 eV/K. At low temperature (T=25 K) these bandgap energies were and . Temperature dependence of bandgap energies is maximum at about T=90 K.