An ab initio calculation based on density functional theory is applied to study the formation energy and transition energy level of defects and complexes in Cd-dopped ZnO. The calculation shows that the incorporation of Cd into ZnO leads to the increase of the O vacancies (VO). VO exists in the form of CdZneVO complex, which can balance the strain caused by CdZn and VO. Due to high formation en...

Analytical results have been presented for an optically illuminated InGaAs MESFET with opaque gate. The excess carriers due to photo generation are obtained by solving the continuity equation. The energy levels are modified due to generation of carriers. The results of I–V characteristics under dark condition and under illumination have been compared and contrasted with the GaAs MESFET.

Recent developments in electric power system technology, power electronics, and information technology motivate researchers to reconsider today’s power delivery systems. Emerging technologies for transmission, conversion and storage of energy constitute an opportunity for power system improvement. Traditional systems are not deemed to meet future requirements in terms of economic and environmen...

To tackle the dilemma of supporting broadband, high-speed wireless access or well utilizing narrow, non-contiguous spectral resource, Long Term Evolution-Advanced (LTE-A) employs carrier aggregation. It combines different component carriers to send data to users in high rates. Many LTE-A downlink resource scheduling methods seek to assign component carriers or resource blocks to improve through...

Finding alternative optoelectronic mechanisms that overcome the limitations of conventional semiconductor devices is paramount for detecting and harvesting low-energy photons. A highly promising approach is to drive a current from the thermal energy added to the free-electron bath as a result of light absorption. Successful implementation of this strategy requires a broadband absorber where car...