Novel CdTe/CdMgTe Graded Quantum Well Structures

Quantum well intermixing in GaInNAs/GaAs structures

Exciton condensate in semiconductor quantum well structures.

We propose that the exciton condensate may form in a well-controlled way in appropriately arranged semiconductor quantum well structures. The mean-field theory of Keldysh and Kopaev, exact in both the high density and the low density limits, is solved numerically to illustrate our proposal. The electron-hole pairing gap and the excitation spectrum of the exciton condensate are obtained. The ene...

Minimized open-circuit voltage reduction in GaAs/InGaAs quantum well solar cells with bandgap-engineered graded quantum well depths

Articles you may be interested in Quadruple-junction thin-film silicon-based solar cells with high open-circuit voltage Appl. Reduction of crosshatch roughness and threading dislocation density in metamorphic GaInP buffers and GaInAs solar cells Improved performance of In(Ga)As/GaAs quantum dot solar cells via light scattering by nanoparticles

Novel preparation of graded porous structures for medical engineering.

The gradation of porosity in a biomaterial can be very useful for a variety of medical engineering applications such as filtration, bone replacement and implant development. However, the preparation of such structures is not a technologically trivial task and replication methods do not offer an easy solution. In this work, we elucidate the preparation of structures having a graded porosity by e...

A novel model on time-resolved photoluminescence measurements of polar InGaN/GaN multi-quantum-well structures

Based on carrier rate equation, a new model is proposed to explain the non-exponential nature of time-resolved photoluminescence (TRPL) decay curves in the polar InGaN/GaN multi-quantum-well structures. From the study of TRPL curves at different temperatures, it is found that both radiative and non-radiative recombination coefficients vary from low temperature to room temperature. The variation...