Akademik Veri Yönetim Sistemi
3nd International Conference on Light and Light-based Technologies (ICLLT), Ankara, Türkiye, 25 - 27 Mayıs 2022, ss.93
The development of inorganic materials that absorb near infrared (NIR) radiation with
a wavelength of 1064 nm is important for many optical applications [1]. Lanthanum
hexaboride (LaB6) is a very interesting material due to its absorption valley centered
around a wavelength of about 900nm-1000 nm. This valley is redshifted by doping with
rare earth elements [2]. In this study, La𝐵6 thin films are coated on glass and PET
substrates with sol-gel spin coating technique. First of all La(𝑂𝐻)3 material with powder
form was obtained by sol-gel process using lanthanum nitrate, sodium hydroxide, and
tergitol as precursors. Structural and optical analyzes of the obtained material were
made and it was concluded that it was compatible with the literature. The LaB6
powders were synthesis with mixing La(𝑂𝐻)3 powders with Lanthanum nitrate
hexahydrate La(NO3)3·6 H2O at suitable conditions. The XRD, FT-IR measurements
of the obtained LaB6 thin films coated on the substrates by spin coating using La𝐵6
powder solution in ethanol and ethylene glycol solvent. Developed films with a
thickness of 110 nm were characterized by using XRD and FTIR techniques. It was
determined that the optical absorption around 1000 nm and Vis transmittance of the
films having a cubic structure (lattice constant 4.19A) were 60% and 70%, respectively.