Photoluminescence excitation spectroscopy of Ti3+in GaP
- 1 January 1991
- journal article
- Published by IOP Publishing in Semiconductor Science and Technology
- Vol. 6 (1) , 36-40
- https://doi.org/10.1088/0268-1242/6/1/007
Abstract
Photoluminescence excitation (PLE) spectra of the internal 2T2 to 2E emission of TiGa3+ in GaP are investigated on samples ranging from n-conducting to p-type semi-insulating. Besides the intracentre and band to band excitation, photoionization of Ti2+ and photoneutralization of Ti4+ terminating in the excited 2T2 state of Ti3+ can be identified from the PLE spectra. The cross section for the capture of conduction band electrons into the excited state of Ti3+ is found to be low.Keywords
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