Excitation spectra of exciton luminescence in CdTe

Abstract

Measurements of the excitation spectra (of the photoluminescence lines below the band gap of CdTe led to the identification of emissions originating from excitons bound to neutral donors, to ionized donors, and to neutral acceptors, as well as from two-electron transitions. Oscillatory variations of the free and bound exciton emission intensity with the energy change of the exciting light above the band gap and their changes with temperature indicated details of the exciton relaxation mechanisms.Mcssungen der Anregnngsspektren der Photolumineszenz von Linien unterhalb der Bandkante von CdTe fiihren zur Tdentifizierung dieser Emissionslinien. Sie werden verursacht durch die Rekombination von Exzit.onen, die an neutrale oder ionisiarte Donatoren oder an neutrale Akzeptoren gebunden sind, sowie von Zwei-Elektronen-Uhergangen. Aus dem oszillatorischen Verhalten der Lumineszenzintensitat von freien und gebundenen Exzitonen bei deran Anregungsspektren oberhalb der Bandkante nnd deren Temperaturabhangigkeit wird auf Einzelheiten der Exzitonen-Relaxationsprozesse gesch!ossen.

Neutral-donor–bound-exciton complexes in ZnO crystals

“…Similar emission lines have been observed in many other materials, CdTe, 14 GaAs, 15,16 CdS, 17 and ZnSe. 13 These transitions were first interpreted as excited states of the neutral-donor-bound-exciton D 0 ,X but with very little detail as to their nature.…”

Optical Properties of ZnO

“…Similar emission lines have been observed in many other materials, such as ZnSe, [36] CdTe, [37] GaAs, [37,39] and CdS. Similar emission lines have been observed in many other materials, such as ZnSe, [36] CdTe, [37] GaAs, [37,39] and CdS.…”

Control of spin dynamics with laser pulses: Generation of entangled states of donor-bound electrons in aCd1−xMnxTe quantum well

“…24,25,37,38,39 As mentioned earlier, provided the external magnetic field is not too strong, J is parallel to the z−axis.…”