Initial photoluminescence decay rates in amorphous phosphorus

Phillips, R. T., Sobiesierski, Zbigniew, Toner, W. T., Barr, J. R. M. and Langley, A. J. 1987. Initial photoluminescence decay rates in amorphous phosphorus. Solid State Communications 63 (6) , pp. 481-484. 10.1016/0038-1098(87)90275-4

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Abstract

Previous measurements of the photoluminescence of amorphous phosphorus have not been able to distinguish between two models of the time-dependent shift of the emission energy of the early radiative recombination. This may arise from recombination of carriers trapped at charged defects or from thermalisation of a carrier in a tail of localised states. The present work extends the time resolution of the luminescence measurement to ≈50 ps which enables a distinction to be made between the two models. The initial decay rates for luminescence in the photon energy ranges 1.45 – 1.6 and 1.45 – 1.85 eV are the same to within ≈1% at 4 K, which supports the assignment of the recombination to carriers trapped at oppositely charged intrinsic defects. The temperature dependence of the initial decay follows the empirical law with ν1 = 8.6 × 108 s-1, ν0 = 3.7 × 108 s-1 and T0 = 104 K. A temperature-dependent branching between two radiative channels is proposed in order to reconcile these observations with earlier work.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Lifelong Learning
Subjects:	Q Science > QC Physics Q Science > QD Chemistry
Publisher:	Elsevier
ISSN:	0038-1098
Last Modified:	04 Jun 2017 02:34
URI:	https://orca.cardiff.ac.uk/id/eprint/11181

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