Hong A-Ra Shin, Seungyong Kang, Gu min Ko, Hyung duk Jang, Ho Seong 2024-01-12T02:30:21Z 2024-01-12T02:30:21Z 2023-11-07 2023-04 1996-1944 https://pubs.kist.re.kr/handle/201004/75737 In this study, we synthesized NaYF4-based downshifting nanophosphors (DSNPs), and fabricated DSNP-polydimethylsiloxane (PDMS) composites. Nd3+ ions were doped into the core and shell to increase absorbance at 800 nm. Yb3+ ions were co-doped into the core to achieve intense near-infrared (NIR) luminescence. To further enhance the NIR luminescence, NaYF4:Nd,Yb/NaYF4:Nd/NaYF4 core/shell/shell (C/S/S) DSNPs were synthesized. The C/S/S DSNPs showed a 3.0-fold enhanced NIR emission at 978 nm compared with core DSNPs under 800 nm NIR light. The synthesized C/S/S DSNPs showed high thermal stability and photostability against the irradiation with ultraviolet light and NIR light. Moreover, for application as luminescent solar concentrators (LSCs), C/S/S DSNPs were incorporated into the PDMS polymer, and the DSNP-PDMS composite containing 0.25 wt% of C/S/S DSNP was fabricated. The DSNP-PDMS composite showed high transparency (average transmittance = 79.4% for the visible spectral range of 380-750 nm). This result demonstrates the applicability of the DSNP-PDMS composite in transparent photovoltaic modules. English MDPI Open Access Publishing Intense Near-Infrared Light-Emitting NaYF4:Nd,Yb-Based Nanophosphors for Luminescent Solar Concentrators Article 10.3390/ma16083187 1 Materials, v.16, no.8 Materials 16 8 Y scie scopus 000977189500001 Chemistry, Physical Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Physics, Applied Physics, Condensed Matter Chemistry Materials Science Metallurgy & Metallurgical Engineering Physics UP-CONVERSION NANOPHOSPHORS HIGHLY EFFICIENT NANOCRYSTALS PHOTOLUMINESCENCE NANOPARTICLES MORPHOLOGY PHOSPHORS EMISSION ENERGY downshifting nanophosphors core/shell/shell transparent polymer composite luminescent solar concentrator