Recent advances in fluorescent upconversion nanomaterials: novel strategies for enhancing optical and magnetic properties to biochemical sensing and imaging …

BT Huy, AP Kumar, TT Thuy, NN Nghia… - Applied Spectroscopy …, 2022 - Taylor & Francis
Upconversion fluorescence is the process of converting optical energy from low absorption
energies to high emission energies. The upconversion (UC) materials exhibit significant …

PEG-coated NaYF4: Tm3+/Yb3+ upconversion nanoparticles for OCT image contrast enhancer, optical thermometry, and security applications

K Shwetabh, A Banerjee, R Poddar, K Kumar - Journal of Alloys and …, 2024 - Elsevier
Polyethylene glycol (PEG) coated NaYF 4: Tm 3+/Yb 3+ upconversion nanoparticles
(UCNPs) were synthesized, and their usefulness in improving image contrast in Swept …

Synthesis of NaYF 4: Ho 3+/Yb 3+ colloidal upconversion phosphor and its application for OCT-based imaging, temperature sensing, fingerprinting and security ink

K Shwetabh, SK Maurya, A Banerjee… - New Journal of …, 2022 - pubs.rsc.org
In this work, an NaYF4: Ho3+/Yb3+ upconversion phosphor in colloidal form was
synthesized and then its suitability for image contrast enhancement in optical coherence …

Upconverted Nanophosphors for Increasing Efficiency in a Dye-Sensitized Solar Cell

YN Chouryal, RK Sharma, N Tomar… - ACS Applied Energy …, 2023 - ACS Publications
Upconverting nanoparticles has a significant potential to enhance solar cell efficiency as a
“spectral converter”. Here, we report a phase pure, cubic, upconverting BaGdF5: Er/Yb …

NaYF4:Ho3+/Yb3+@NaGdF4 core@shell upconversion nanoparticles for contrast enhancement in bimodal in-vitro OCT imaging

K Shwetabh, A Banerjee, R Poddar, K Kumar - Microchimica Acta, 2024 - Springer
Contrast enhancement is explored in optical coherence tomography images using core
NaYF4: Ho3+/Yb3+ and core@ shell NaYF4: Ho3+/Yb3+@ NaGdF4 nanoparticles. Under …

Optical thermometry, latent fingerprint detection and anti-counterfeiting based on upconversion emission in Ho3+/Yb3+ doped KYF4 nanoparticles

K Shwetabh, MI Sarkar, K Kumar - Optical Materials, 2023 - Elsevier
The structural, morphological, and optical properties of the KYF 4: Ho 3+/Yb 3+
upconversion nanoparticles were investigated in this work. In the upconversion emission …

Comparative study of upconversion and photoacoustic measurements of Er3+/Yb3+ doped La2O3 phosphor under 980 nm

MI Sarkar, NK Mishra, K Kumar - Methods and Applications in …, 2022 - iopscience.iop.org
Abstract The Er 3+/Yb 3+ doped La 2 O 3 phosphor samples were synthesized by the
combustion method and then photoluminescence and photoacoustic spectroscopic studies …

Effect of Mg2+ and Zn2+ addition on photoluminescent and photoacoustic spectroscopy of La2O3: Er3+/Yb3+ phosphors

MI Sarkar, K Kumar - Inorganic Chemistry Communications, 2023 - Elsevier
Photoluminescence (PL) and photoacoustic spectroscopy (PAS) are important techniques
for materials characterization. The La 2 O 3: Er 3+/Yb 3+ phosphors samples were …

Photocatalytic, thermometric and internal heating multifunctional properties of Er3+/Yb3+-codoped MoO3 upconverting microparticles

C Wang, P Du, L Luo, W Li - Journal of Luminescence, 2021 - Elsevier
To solve the existing challenges of luminescent materials for multifunctional applications, we
developed Er 3+/Yb 3+-codoped MoO 3 upconvering microparticles as promising platforms …

Assessment of colloidal NaGdF4: Er3+/Yb3+ upconversion phosphor as contrast enhancer for optical coherence tomography

SK Maurya, JCGE da Silva, M Mohan, R Poddar… - Journal of Alloys and …, 2021 - Elsevier
In-vitro imaging by swept-source optical coherence tomography (OCT) represents a class of
advanced tomography that provides comprehensive and accurate clinical diagnostics. Here …