<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The effect of germanium trapezoidal profile shape on the direct current (DC) current gain (βF), cut-off frequency (fT) and maximum oscillation frequency (fMAX) of silicon-germanium (SiGe) hetero-junction bipolar transistors (HBTs) has been investigated. The energy balance (EB), hydrodynamic (HD) and drift-diffusion (DD) physical transport models in SILVACO technology computer aided design (T-CAD) simulator were used. It was found that the current gain values using energy balance model are higher than hydrodynamic and much higher than those corresponding to drift-diffusion. Moreover, decreasing the germanium gradient slope towards the collector side of the base enhances the maximum oscillation frequencies using HD and EB models whilst, they remain stable for DD model.</p></abstract>

The effect of germanium trapezoidal profile shape on the direct current (DC) current gain (βF), cut-off frequency (fT) and maximum oscillation frequency (fMAX) of silicon-germanium (SiGe) hetero-junction bipolar transistors (HBTs) has been investigated. The energy balance (EB), hydrodynamic (HD) and drift-diffusion (DD) physical transport models in SILVACO technology computer aided design (T-CAD) simulator were used. It was found that the current gain values using energy balance model are higher than hydrodynamic and much higher than those corresponding to drift-diffusion. Moreover, decreasing the germanium gradient slope towards the collector side of the base enhances the maximum oscillation frequencies using HD and EB models whilst, they remain stable for DD model.

Removal of Methylene Blue by Activated Glass Foams with TiO<sub>2</sub> in Dark and Simulated Solar Light

National Institute for Research and Development in Electrochemistry and Condensed Matter

Annals of West University of Timisoara - Physics

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Removal of Methylene Blue by Activated Glass Foams with TiO in Dark and Simulated Solar Light

The effect of germanium trapezoidal profile shape on the direct current (DC) current gain (βF), cut-off frequency (fT) and maximum oscillation frequency (fMAX)...

Removal of Methylene Blue by Activated Glass Foams with TiO₂ in Dark and Simulated Solar Light

Publié en ligne: 21 janv. 2020

Pages: 33 - 43

Reçu: 25 août 2019

Accepté: 29 nov. 2019

DOI: https://doi.org/10.2478/awutp-2019-0003

Mots clés
environment friendly, anatase, foam glass, building materials, photocatalytic activity

© 2019 Florina Stefania Rus et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Removal of Methylene Blue by Activated Glass Foams with TiO2 in Dark and Simulated Solar Light

Publié en ligne: 21 janv. 2020

Pages: 33 - 43

Reçu: 25 août 2019

Accepté: 29 nov. 2019

DOI: https://doi.org/10.2478/awutp-2019-0003

Mots clésenvironment friendly, anatase, foam glass, building materials, photocatalytic activity

© 2019 Florina Stefania Rus et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Removal of Methylene Blue by Activated Glass Foams with TiO₂ in Dark and Simulated Solar Light

Mots clés
environment friendly, anatase, foam glass, building materials, photocatalytic activity