In this work the photoluminescence study and energy transfer from Tb3+ to Eu3+–β–diketonate complexes incorporated into organic/Silica hybrid films derived from 3–glycidoxypropyltrimethoxysilane (GPTMS) and tetraethylorthosilicate (TEOS) alkoxysilanes were investigated. Highly homogeneous and transparent films of Ln3+–doped GPTMS/TEOS–derived organic/silica hybrids were obtained from the organic/silica sols prepared by sol–gel. Tb3+:Eu3+–doped GPTMS/TEOS–derived films showed very intense luminescence when excited with UV light. Films co–doped with Tb3+ concentration fixed at 40.0×1018 ions/cm3 and Eu3+ concentrations of 0, 0.03, 0.05, 0.1, 0.3, 0.5, 1.0, 1.5, and 2.0×1018 ions/cm3 were studied. The films presented characteristic transitions 5D4–7F6-3 of Tb3+ ions and 5D0–7F0–4 of Eu3+ ions measured on the visible spectrum region. Energy transfer from Terbium to Europium was studied through emission decay time measurements of 5D4–7F5 transition of Tb3+ (547 nm) which showed an accentuated decrease (from 1329 to 55 µs) due to the co–doping with Eu3+ ions concentrations varied from 0.03 to 1.5×1018 ions/cm3. Energy transfer rate (WET) of 17.4×103 s−1 and relative energy transfer efficiency (ηT) of 96% were observed for films samples co–doped with 40×1018 ions/cm3 of Tb3+ and 1.5×1018 ions/cm3 of Eu3+. Due to the variation in WET and ηT from Tb3+ to Eu3+, the intensity ratios of Tb3+ band at 547 nm (5D4–7F5) and Eu3+ band at 617 nm (5D0–7F2) vary remarkably making the co–doped film samples exhibit different luminescence colors varying from green to orange and red which can be tuned by the Tb3+/Eu3+ ratio incorporated into the samples.
Journal of Luminescence – Elsevier
Published: May 1, 2018
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera