Mechanisms of Tenebrescence and Persistent Luminescence in Synthetic Hackmanite Na8Al6Si6O24(Cl,S)2
- 2 May 2016
- journal article
- research article
- Published by American Chemical Society (ACS) in ACS Applied Materials & Interfaces
- Vol. 8 (18), 11592-11602
- https://doi.org/10.1021/acsami.6b01959
Abstract
Synthetic hackmanites, Na8Al6Si6O24(Cl,S)2, showing efficient purple tenebrescence and blue/white persistent luminescence were studied using different spectroscopic techniques to obtain a quantified view on the storage and release of optical energy in these materials. The persistent luminescence emitter was identified as impurity Ti3+ originating from the precursor materials used in the synthesis and the energy storage for persistent luminescence was postulated to take place in oxygen vacancies within the aluminosilicate framework. The tenebrescence, on the other hand, was observed to function within the Na4(Cl,S) entities located in the cavities of the aluminosilicate framework. The mechanism of persistent luminescence and tenebrescence in hackmanite is presented for the first time.Keywords
Funding Information
- Energimyndigheten
- Nordic Energy Research
- Knut och Alice Wallenbergs Stiftelse
- Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico
- Suomen Akatemia
- Seventh Framework Programme (312284)
- Turun yliopiston tutkijakoulu
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