Abstract

This contribution reports on the optical properties of biosynthesised ${\rm{Eu}_2}{{\rm{O}}_3}$ nanoparticles bioengineered for the first time by a green and cost effective method using aqueous fruit extracts of Hyphaene thebaica as an effective chelating and capping agent. The morphological, structural, and optical properties of the samples annealed at 500°C were confirmed by using a high-resolution transmission electron microscope (HR-TEM), x-ray diffraction analysis (XRD), UV–Vis spectrocopy, and photoluminescence spectrometer. The XRD results confirmed the characteristic body-centered cubic (bcc) structure of ${\rm{Eu}_2}{{\rm{O}}_3}$ nanoparticles with an average size of 20 nm. HR-TEM revealed square type morphology with an average size of ${\sim}{{6}}\;{\rm{nm}}$. Electron dispersion energy dispersive x-ray spectroscopy spectrum confirmed the elemental single phase nature of pure ${\rm{Eu}_2}{{\rm{O}}_3}$. Furthuremore, the Fourier transformed infrared spectroscopy revealed the intrinsic characteristic peaks of ${\rm{Eu}} {-} {\rm{O}}$ bond stretching vibrations. UV–Vis reflectance proved that ${\rm{Eu}_2}{{\rm{O}}_3}$ absorbs in a wide range of the solar spectrum from the VUV–UV region with a bandgap of 5.1 eV. The luminescence properties of such cubic structures were characterized by an intense red emission centered at 614 nm. It was observed that the biosynthesized ${\rm{Eu}_2}{{\rm{O}}_3}$ nanoparticles exhibit an efficient red-luminescence and hence a potential material as red phosphor.

© 2020 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Luminescent properties of novel red-emitting phosphor: Gd2O2CN2:Eu3+

Luting Wang, Shuanglong Yuan, Yunxia Yang, Francois Chevire, Franck Tessier, and Guorong Chen
Opt. Mater. Express 5(11) 2616-2624 (2015)

Y2O3: Eu3+/PMMA hybrid film as a converter for enhanced harvesting of broadband solar-blind UV light

Xue Li, Chen Li, Linhui Gao, Hongliang Zhu, Longcheng Wang, Jing Chen, Yongtao Li, and Jinsheng Zheng
Appl. Opt. 59(27) 8205-8210 (2020)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (6)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (2)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription