Jigang Wang

Luminescence enhancement in LaPO4: Ce/CdTe nanocomposite scintillators

Radiation detection demands new scintillators with high quantum efficiency, high energy resolution, and short luminescence lifetimes. Herein, we report the enhancement in the photoluminescence and x-ray luminescence from CdTe quantum dots in LaPO4:Ce/CdTe nanocomposites and their potential applications for radiation detection. The luminescence enhancement is attributed to energy transfer from LaPO4:Ce to CdTe quantum dots in the nanocomposites. LaPO4:Ce nanoparticles have a high stopping power for radiation but their emission is in the ultraviolet range that is reabsorbed in most polymer host materials. CdTe quantum dots have strong photoluminescence and size-tunable emissions but very weak scintillation emission due to their low stopping power. The combination of LaPO4:Ce nanoparticles and CdTe quantum dots takes the advantages of both materials to make a promising nanocomposite scintillator for radiation detection.

Luminescence enhancement in LaPO4:Ce/CdTe nanocomposite scintillators

Radiation detection demands new scintillators with high quantum efficiency, high energy resolution, and short luminescence lifetimes. Herein, we report the enhancement in the photoluminescence and x-ray luminescence from CdTe quantum dots in LaPO4:Ce/CdTe nanocomposites and their potential applications for radiation detection. The luminescence enhancement is attributed to energy transfer from LaPO4:Ce to CdTe quantum dots in the nanocomposites. LaPO4:Ce nanoparticles have a high stopping power for radiation but their emission is in the ultraviolet range that is reabsorbed in most polymer host materials. CdTe quantum dots have strong photoluminescence and size-tunable emissions but very weak scintillation emission due to their low stopping power. The combination of LaPO4:Ce nanoparticles and CdTe quantum dots takes the advantages of both materials to make a promising nanocomposite scintillator for radiation detection.

Research Based on Dependencies of Luminescent Properties of CdTe Quantum Dots with TGA as Surfactant

We investigated the optical characterization of luminescent thioglycolic acid (TGA) stabilized CdTe quantum dots (CdTe-QD) synthesized in water. The influence of stabilizing agents on the luminescent properties of water-soluble CdTe quantum dots (QDs) was described. It is found that QDs can be synthesized easily when TGA is chosen as stabilizing agent and TGA leads to preparation of highly luminescent QDs due to the secondary effects of bonds between Cd2+ and sulfhydryl groups. The absorption wavelength and PL stability of TGA-CdTe are also characterized. Size can be controlled between 2.0 nm to 4.0 nm. The TGA-CdTe QDs prepared at 2 h reaction time possess excellent luminescent properties.

Luminescence enhancement in LaPO 4

Radiation detection demands new scintillators with high quantum efficiency, high energy resolution, and short luminescence lifetimes. Herein, we report the enhancement in the photoluminescence and x-ray luminescence from CdTe quantum dots in LaPO4:Ce/CdTe nanocomposites and their potential applications for radiation detection. The luminescence enhancement is attributed to energy transfer from LaPO4:Ce to CdTe quantum dots in the nanocomposites. LaPO4:Ce nanoparticles have a high stopping power for radiation but their emission is in the ultraviolet range that is reabsorbed in most polymer host materials. CdTe quantum dots have strong photoluminescence and size-tunable emissions but very weak scintillation emission due to their low stopping power. The combination of LaPO4:Ce nanoparticles and CdTe quantum dots takes the advantages of both materials to make a promising nanocomposite scintillator for radiation detection.