Cathodoluminescence studies of phosphors in a scanning electron microscope

6th International Conference on Optical, Optoelectronic and Photonic Materials and Applications 2014

Harris, Paul^1 ; Den Engelsen, Daniel^1 ; Ireland, Terry^1 ; Fern, George^1 ; Silver, Jack^1

Centre for Phosphor and Display Materials, Wolfson Centre for Materials Processing, Brunel University, Uxbridge, Middlesex

UB8 3PH, United Kingdom^1

关键词: Decay time;    Field emission scanning electron microscopes;    Individual particles;    Phosphor materials;    Scan rates;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/619/1/012051/pdf
DOI  :  10.1088/1742-6596/619/1/012051

来源: IOP

【 摘 要 】

Cathodoluminescence studies are reported of phosphors in a field emission scanning electron microscope (FESEM). A number of phosphor materials have been studied and exhibited a pronounced comet-like structure at high scan rates, because the particle continued to emit light after the beam had moved onto subsequent pixels. Image analysis has been used to study the loss of brightness along the tail and hence to determine the decay time of the materials. This technique provides a simple and convenient way to study the decay times of individual particles.