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The solid-state photoluminescent quantum yield of triboluminescent materials

Bourhill, G and Palsson, L O and Samuel, I D W and Sage, I C and Oswald, I D H and Duignan, J P (2001) The solid-state photoluminescent quantum yield of triboluminescent materials. Chemical Physics Letters, 336 (3-4). pp. 234-241. ISSN 0009-2614

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Abstract

Ground rules defining design of triboluminescent (TL) materials are currently missing, in part since the triboluminescent efficiency is the product of the efficiency of excited-state formation and the efficiency of radiative relaxation from these excited-states. In order to de-couple these two processes, we have measured, for the first time, the solid-state photoluminescent quantum yield of various triboluminescent materials. The measurements highlighted: (i) some triboluminescent materials possess near-optimised radiative yields; (ii) structurally similar triboluminescent compounds can exhibit widely varying yields and (iii) some triboluminescent materials, which appear to the eye as reasonably efficient, possess low radiative yields, allowing possible triboluminescent enhancement.