We present room temperature resonant tunneling of GaSb/AlAsSb double barrier resonant tunneling diodes with pseudomorphically grown prewell emitter structures comprising the ternary compound semiconductors GaInSb and GaAsSb. At room temperature, resonant tunneling is absent for diode structures without prewell emitters. The incorporation of Ga0.84In0.16Sb and GaAs0.05Sb0.95 prewell emitters lea...

With an amorphous silicon (a-Si:H)/crystalline silicon (c-Si) heterojunction structure, the heterojunction with intrinsic thin-layer (HIT) solar cell has become one of the most promising technologies for c-Si based solar cells. By replacing a-Si:H thin films with appropriate compound semiconductors, we propose novel heterojunction structures which allow c-Si heterojunction solar cells to posses...

Heterostructures, as I use the word here, may be defined as heterogeneous semiconductor structures built from two or more different semiconductors, in such a way that the transition region or interface between the different materials plays an essential role in any device action. Often, it may be said that the interface is the device. The participating semiconductors all involve elements from th...

Both the static and kinetic properties of defects play fundamental roles in determining physical semiconductors. Compared to defects, a comprehensive understanding different diffusing types semiconductors is still lacking. In this article, based on extensive first-principles calculations, we have done comparative study diffusion mechanisms point Si (a typical elemental semiconductor) GaN compou...

Commercial availability of 10-cm (4-in.) GaAs wafers suggests that this material could be used for practical spectroscopic gratings. In addition, gratings with a variety of groove structures are used in integrated electrooptics which are mostly based on compound semiconductors.2 An understanding of crystallographic effects in controlling groove geometry during photoetching will permit the fabri...

Rights: © 2011 American Physical Society (APS). This is the accepted version of the following article: Rauch, Christian & Makkonen, Ilja & Tuomisto, Filip. 2011. Identifying vacancy complexes in compound semiconductors with positron annihilation spectroscopy: A case study of InN. Physical Review B. Volume 84, Issue 12. 125201/1-9. ISSN 1098-0121 (printed). DOI: 10.1103/physrevb.84.125201, which...

Optical modulators are commonly used in communication and information technology to control intensity, phase, or polarization of light. Electro-optic, electroabsorption, and acousto-optic modulators based on semiconductors and compound semiconductors have been used to control the intensity of light. Because of gate tunable optical properties, graphene introduces new potentials for optical modul...