Mechanisms of Tenebrescence and Persistent Luminescence in Synthetic Hackmanite Na8Al6Si6O24(Cl,S)2

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• 作者：Isabella Norrbo ; Pawel Gluchowski ; Iko Hyppänen ; Tero Laihinen ; Pekka Laukkanen ; Jaakko Mäkelä ; Fikret Mamedov ; Hellen S. Santos ; Jari Sinkkonen ; Minnea Tuomisto ; Antti Viinikanoja ; Mika Lastusaari
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：May 11, 2016
• 年：2016
• 卷：8
• 期：18
• 页码：11592-11602
• 全文大小：620K
• 年卷期：0
• ISSN：1944-8252

文摘

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. 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.