Effective electron mass in compound semiconductor films
TL;DR: In this article, the effective mass of electrons was evaluated for compound semiconductor films of CdS x Te 1−x and CsS x Se 1−X which showed bowing phenomena similar to those for optical bandgaps for the above alloy films.
About: This article is published in Vacuum.The article was published on 1993-08-01. It has received 4 citations till now. The article focuses on the topics: Effective mass (solid-state physics) & Inorganic compound.
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TL;DR: In this article, a bowing effect was observed in Zn x Cd 1−x Se films, with an effective mass of the carriers varied with x and indicated that the carriers were highly resistive and polycrystalline.
42 citations
TL;DR: In this paper, a method for evaluating the effective electron mass in compound semiconductors of the form AB x C 1−x or A x B 1 −x C from the variation of band gaps in them is presented.
20 citations
01 Jan 2012
TL;DR: In this article, the authors have discussed many aspects of TPSM based on the dispersion relations of the nanostructures of different technologically important materials having different band structures in the presence of 1D, 2D, and 3D confinements of the wavevector space of the charge carriers, respectively.
Abstract: In this book, we have discussed many aspects of TPSM based on the dispersion relations of the nanostructures of different technologically important materials having different band structures in the presence of 1D, 2D, and 3D confinements of the wave-vector space of the charge carriers, respectively. In this chapter, we discuss few applications in this context in Sect. 14.2 and we shall also present a very brief review of the experimental investigations in Sect. 14.3 which is a sea in itself. Section 14.4 contains the single experimental open research problem.
4 citations
TL;DR: In this paper, a general modeling methodology has been developed to evaluate the effects of chemical interdiffusion and misfit dislocations on the performance of heterojunction solar cells made from highly mismatched materials.
Abstract: A general modelling methodology has been developed to evaluate the effects of chemical interdiffusion and misfit dislocations on the performance of heterojunction solar cells made from highly mismatched materials. Results for the exemplar materials system CdS-CdTe are contrary to the widely held belief that such interdiffusion is beneficial to photovoltaic performance. In the model, recombination is presumed to take place at the cores of misfit dislocations, with the distribution of these dislocations in the interdiffused layer being calculated so as to minimise the total energy (an incidental result shows that the total number of dislocations is independent of the diffusion profile). The model takes calculated chemical profiles, optical absorption, and dislocation distributions from which the photovoltaic performance and recombination losses are evaluated. It was shown that for the realistic case in which the interdiffused region does not extend beyond the space charge region, the photovoltage losses dominate over any photocurrent gains. Methods to engineer mixed junctions that may increase solar conversion efficiency are discussed.
1 citations
References
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TL;DR: In this paper, a new formulation and method are presented for evaluating bandgap, optical transitions and optical constants from the reflectance data for films deposited onto a non-absorbing substrate, which can be used to evaluate the optical properties of the films.
241 citations
TL;DR: The physical origin of the bowing of energy gaps in semiconductor alloys is considered in this paper, where it is shown that disorder plays no significant part in energy gap bowing.
Abstract: The physical origin of the bowing of energy gaps in semiconductor alloys is considered. It is shown that disorder plays no significant part in energy-gap bowing, and that the virtual crystal approximation is valid. An expression is derived for the bowing resulting from the nonlinear dependence of the crystal potential on the properties of the component ions, and very good agreement is found with experimental data for sixteen alloys at the Gamma point ad eight alloys at the L point.
191 citations
TL;DR: In this paper, thin films of CdSx Te1−x have been prepared by electron-beam evaporation throughout the composition range, and optical energy gaps have been measured, and observed variation of energy gap with composition is compared with previous results and with theoretical prediction.
54 citations