Band-tail states in a Zn0.3Cd0.7Se semiconductor alloy probed by persistent photoconductivity.

Metal-insulator transition in semiconductor alloys probed by persistent photoconductivity.

The metal-insulator transition (MIT) caused purely by alloy disorder in a Zno 3Cdo 7Se semiconductor alloy has been probed by using persistent photoconductivity. Key parameters that describe the MIT, including the critical electron concentration n, and the energy tail states distribution parameter Eo, have been determined experimentally. Our results, together with those obtained for impurity-do...

Disorder and persistent photoconductivity in ZnxCd1-xSe semiconductor alloys.

A theoretical formula based on carrier scattering in systems with a certain degree of disorder has been derived, which describes well the buildup transients of persistent photoconductivity and carrier transport due to the conduction-band tail states in semiconductor alloys. Important parameters, including the distribution of tail states caused purely by alloy disorder, can be obtained by compar...

Effects of alloy disorder on the transport properties of Al x Ga 1x N epilayers probed by persistent photoconductivity

Charge storage and persistent photoconductivity in a CdS0.5Se0.5 semiconductor alloy.

Relaxation of stored charge carriers in the persistent-photoconductivity (PPC) mode in a CdSo 5Seo, semiconductor alloy has been investigated. The relaxation time constant of PPC is systematically measured as a function of temperature, from which the recombination barrier height E„, has been determined. Low-temperature exciton luminescence has also been investigated and the exciton transition l...

Electric-field-enhanced persistent photoconductivity in a Zn0.02Cd0.98Te semiconductor alloy.

Persisent photoconductivity (PPC) has been investigated in a Znp 02Cdp 98Te semiconductor alloy. A transition from a photoconductivity phase to a PPC phase has been observed and a coexistence curve that separates these two phases has been obtained. We find that such a transition can be controlled by the bias voltage and excitation photon dose. The relaxation of PPC is found to follow a power la...