China
Africa
Explore chapters and articles related to this topic
An Introduction to Capacitance Spectroscopy in Semiconductors
Published in Jian V. Li, Giorgio Ferrari, Capacitance Spectroscopy of Semiconductors, 2018
The differential capacitance is thus a measure of the small-signal response of charge to a varying electric potential, e.g., those occurring at discrete spatial locations, as opposed to the total charge distributed over the entire volume of electric potential distribution. The differential capacitance reflects incremental changes in the quantity and location of stored charge, which can vary with voltage, time, temperature, light, or other experimental variables. In this way, the differential capacitance provides insight into distinct physical characteristics of semiconductor materials and devices, forming the foundation of the various capacitance spectroscopy techniques discussed in this book.
Performance modelling of textile solar cell developed by carbon fabric/polypyrrole flexible counter electrode
Published in International Journal of Sustainable Energy, 2022
Mahmoud Saberi Motlagh, Vahid Mottaghitalab, Asghar Rismanchi, Mahboobeh Rafieepoor Chirani, Mahdi Hasanzadeh
As shown in Figure 3(d), due to the PPy structure properties in the CF, such as the porosity, tortuosity, and the specific surface area, the deposited PPy exhibits the flat structure topology with shallow pores, containing the soft morphology, which is decreased electrolyte penetration and adsorption in an EDL. Generally, increasing the mesoporous homogenic structure in the counter electrode surface would enhance the ion exchange rate. Moreover, it could prepare a perfect morphology for ion diffusion via the pores and adsorption onto the active chemical site with a high surface area. Increasing the surface charge would also enhance the differential capacitance, as shown in Figure 3(e). Hence, lower electron/hole charge transfer in the counter electrode/electrolyte interface region is envisaged in an EDL. [45–47] (Figure 4).
Ferroelectric, Piezoelectric Mechanism and Applications
Published in Journal of Asian Ceramic Societies, 2022
Arun Singh, Shagun Monga, Neeraj Sharma, K Sreenivas, Ram S. Katiyar
A series of IV–VI semiconductor compounds which have a narrow bandgap, i.e GeTe, SnTe, and a solid solution of GeTe-SnTe and PbTe-GeTe, exhibit ferroelectricity, but because of their high dc conductivity, polarization reversal and dielectric constant anomaly cannot be measured. The differential capacitance measurement of Pb1-x Gex Te junction diode under various conditions of temperature and bias shows an increase in the capacitance at the temperature of transition [8]. The ferroelectric phase transition in SnTe has been studied using the Raman scattering technique [9] and by the neutron diffraction method [10].
Capacitance of electrolytes with hydration-mediated interaction in planar electric double layers
Published in Molecular Physics, 2020
Minhye Heo, Ghi Ryang Shin, Soon-Chul Kim
The electrostatic properties of electric double layer are directly influenced by properties of the electrolyte solution such as temperature, salt concentration, structural features of the mobile ions, and solvent structure. It plays very important role in many areas such as the biology, physico-chemical systems, and technological applications. One of the interesting results to emerge out of studies of the electric double layer is the differential capacitance at surface charge density on the electrode [1–3].