Water-soluble polymers as chelating agents for the deposition of Er3 /Yb3 :LiNbO3 waveguiding films

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F18%3A43915785" target="_blank" >RIV/60461373:22310/18:43915785 - isvavai.cz</a>

Alternative codes found

RIV/68378271:_____/18:00491186

Result on the web

<a href="https://link.springer.com/article/10.1007%2Fs10971-018-4639-5" target="_blank" >https://link.springer.com/article/10.1007%2Fs10971-018-4639-5</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10971-018-4639-5" target="_blank" >10.1007/s10971-018-4639-5</a>

Result language

angličtina

Original language name

Water-soluble polymers as chelating agents for the deposition of Er3 /Yb3 :LiNbO3 waveguiding films

Original language description

Compared to other oxide materials, the sol-gel deposition of an optically transparent LiNbO3 waveguiding film of sufficient thickness (approx. 1 mu m) is complicated by the presence of a highly hydrolyzing Nb(V) in the starting solution. Thicker films require more concentrated solutions that are not easily achieved for such ions. This problem may be solved using strong chelating agents such as water-soluble polymers. To prepare a stable Er(III)/Yb(III)/Li(I)/Nb(V)/2-methoxyethanol solution with high metal concentration, we tested three such polymers: polyethylene glycol (PEG), polyacrylic acid (PAA) and polyvinyl alcohol (PVA), and compared them with already used polyvinylpyrrolidone (PVP). The solutions were spin-coated on crystalline sapphire substrates under a multi-step heating-deposition regime. Apart from Er3+/Yb3+ photoluminescence properties, we evaluated the influence of the film microstructure (SEM, AFM) on optical transparency and waveguiding ability in the UV/Vis/NIR region (transmission and m-line spectroscopy). Among the newly tested polymers, only PEG was able to prevent Nb(V) hydrolysis up to a maximum metal concentration of 0.6 mol/L. For PEG and PVP, the crystallization temperature of the deposited films (between 700 A degrees C and 1000 A degrees C) was compared. After further optimization of the heating-deposition process, we were able to prepare a transparent Er3+/Yb3+:LiNbO3 film thick enough to guide an optical signal in the NIR region. Thus, the use of PEG results is one of the very few non-hydrolytic sol-gel methods suitable for the preparation of not only luminescent, but also waveguiding Er3+/Yb3+:LiNbO3 structures.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10402 - Inorganic and nuclear chemistry

Project

<a href="/en/project/GBP108%2F12%2FG108" target="_blank" >GBP108/12/G108: Preparation, modification and characterization of materials by radiation</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY

ISSN

0928-0707

e-ISSN

—

Volume of the periodical

86

Issue of the periodical within the volume

2

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

11

Pages from-to

274-284

UT code for WoS article

000431117300004

EID of the result in the Scopus database

2-s2.0-85044483426