Cathodoluminescence characterization of Ge‐doped CdTe crystals

Study of point defects in CdTe and CdTe:V by cathodoluminescence

The defect structure of CdTe substrates has often been investigated with luminescence techniques. In particular, a luminescence band normally referred as the 1.40 eV band, has been associated with recombination processes involving defects but its nature seems to be complex. Myers et al.’ in their photoluminescence study of CdTe wafers concluded that a significant part of the 1.40 eV band is dir...

Melt-growth dynamics in CdTe crystals.

We use a new, quantum-mechanics-based bond-order potential (BOP) to reveal melt growth dynamics and fine scale defect formation mechanisms in CdTe crystals. Previous molecular dynamics simulations of semiconductors have shown qualitatively incorrect behavior due to the lack of an interatomic potential capable of predicting both crystalline growth and property trends of many transitional structu...

Optical characterization of type-II CdTe/CdSe/CdTe heterostructure nanorods

The optical characteristics of an indirect type II transition in a series of size and shape-controlled linear CdTe/CdSe/CdTe heterostructure nanorods was studied by steady state and time resolved photoluminescence spectra. The energy and lifetime of the photoluminescence from the charge-separated band structure can be tuned by the band edges of the nanorods. Our results show a size-dependent tr...

SEM cathodoluminescence studies of heat-treated MgO crystals

— The luminescence of MgO single crystals has been investigated using a scanning electron microscope (SEM) with a detection system for spectroscopic cathodoluminescence (CL) studies. The corrected CL spectrum of MgO consists of a large blue band with a maximum at 460 nm and a broad red emission with a dominant 722 nm peak. Annealing treatments in air, carbon monoxide or hydrogen change the spec...

Preparation and Characterization of CdTe Solar Cells