The vacuum referred electron binding energies in the S01 and P13 states of Pb2+ and Tl+ in inorganic compounds

Abstract An overview of the spectroscopic data on Tl + and Pb 2 + in 37 and 126 different inorganic compounds, respectively, is presented. Using the metal-to-metal charge transfer and A-band transition energies, the electron binding energies in the S 0 1 ground state and P 1 3 excited state of Tl + and Pb 2 + were determined relative to the vacuum level. By constructing vacuum referred binding energy (VRBE) diagrams that display the energy levels of the Tl + and Pb 2 + activator ion together with that of the host compound, insight in the luminescent properties of these activated compounds are gained. The obtained VRBEs of the electron in the S 0 1 and P 1 3 states of Tl + and Pb 2 + are compared to those of Bi 3 + .