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Lanthanide and Heavy Metal Free Long White Persistent Luminescence from Ti Doped Li-Hackmanite: A Versatile, Low-Cost Material
Univ Turku, Dept Chem, FI-20014 Turku, Finland.;Univ Turku, Grad Sch UTUGS, Doctoral Programme Phys & Chem Sci PCS, FI-20014 Turku, Finland..
Univ Turku, Dept Chem, FI-20014 Turku, Finland.;Univ Sao Paulo, Inst Chem, BR-05508000 Sao Paulo, Brazil..
Univ Turku, Dept Phys & Astron, FI-20014 Turku, Finland..
Univ Turku, Grad Sch UTUGS, Doctoral Programme Phys & Chem Sci PCS, FI-20014 Turku, Finland.;Univ Turku, Dept Phys & Astron, FI-20014 Turku, Finland..
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2017 (English)In: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028, Vol. 27, no 17, article id 1606547Article in journal (Refereed) Published
Abstract [en]

Persistent luminescence (PeL) materials are used in everyday glow-in-the-dark applications and they show high potential for, e.g., medical imaging, night-vision surveillance, and enhancement of solar cells. However, the best performing materials contain rare earths and/or other heavy metal and expensive elements such as Ga and Ge, increasing the production costs. Here, (Li,Na)(8)Al6Si6O24(Cl,S)(2):Ti, a heavy-metal-and rare-earth-free low-cost material is presented. It can give white PeL that stays 7 h above the 0.3 mcd m(-2) limit and is observable for more than 100 h with a spectrometer. This is a record-long duration for white PeL and visible PeL without rare earths. The material has great potential to be applied in white light emitting devices (LEDs) combined with self-sustained night vision using only a single phosphor. The material also exhibits PeL in aqueous suspensions and is capable of showing easily detectable photoluminescence even in nanomolar concentrations, indicating potential for use as a diagnostic marker. Because it is excitable with sunlight, this material is expected to additionally be well-suited for outdoor applications.

Place, publisher, year, edition, pages
2017. Vol. 27, no 17, article id 1606547
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-322524DOI: 10.1002/adfm.201606547ISI: 000400449200007OAI: oai:DiVA.org:uu-322524DiVA, id: diva2:1098221
Funder
Swedish Energy AgencyKnut and Alice Wallenberg FoundationAvailable from: 2017-05-23 Created: 2017-05-23 Last updated: 2017-05-23Bibliographically approved

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Mamedov, Fikret

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