Speaker
Prof.
Makaiko Chithambo
(Rhodes University)
Description
If the emission of luminescence is affected by thermal assistance, and if the total probability of emission 1/τ is modulated by a Boltzmann factor exp(- Εα/ κΤ) where Εα is the activation energy of thermal assistance, the overall probability of optically stimulated luminescence emission can be expressed for n electron traps as:
1/τ = [1/τrαd + ν exp( - ΔΕ / κΤ) ] Π ni exp ( - Εαi /κΤ)
where Τrαd is the radiative lifetime, and are as previously defined, υ is the activation energy for thermal assistance for the electron trap and the number of electron traps contributing to the process [1]. We will examine how to quantify thermal effects in cases where the luminescence ensues with very high efficiency such that any little additional component due to thermal assistance and any loss due to non-radiative transitions is masked.
References
1 Chithambo, M.L., Costin, G., 2017. Temperature-dependence of time-resolved optically stimulated luminescence and composition heterogeneity of synthetic -Al2O3:C. J. Lumin. 182, 252-262.
Level for award<br> (Hons, MSc, <br> PhD, N/A)?
N/A
Apply to be<br> considered for a student <br> award (Yes / No)?
No
Primary author
Prof.
Makaiko Chithambo
(Rhodes University)
