Han, Jaehyun Burak, Darya Poliukhova, Valeriia Lee, Albert S. S. Jang, Hoseong Hwang, Seungsang Baek, Kyung-Youl Han, Joonsoo Ju, Byeong-Kwon Cho, So-Hye 2024-01-19T10:01:39Z 2024-01-19T10:01:39Z 2023-04-13 2023-03 1996-1944 https://pubs.kist.re.kr/handle/201004/113930 Ladder-type polysilsesquioxanes (LPSQs) containing phenyl as a high refractive index unit and cyclic epoxy as a curable unit were found to be excellent candidates for a transparent color conversion layer for displays due to being miscible with organic solvents and amenable to transparent film formation. Therefore, the LPSQs were combined with luminescent lanthanide metals, europium Eu(III), and terbium Tb(III), to fabricate transparent films with various emission colors, including red, orange, yellow, and green. The high luminescence and transmittance properties of the LPSQs-lanthanide composite films after thermal curing were attributed to chelating properties of hydroxyl and polyether side chains of LPSQs to lanthanide ions, as well as a light sensitizing effect of phenyl side chains of the LPSQs. Furthermore, Fourier-transform infrared (FT-IR) and X-ray photoelectron spectroscopy and nanoindentation tests indicated that the addition of the nanoparticles to the LPSQs moderately enhanced the epoxy conversion rate and substantially improved the wear resistance, including hardness, adhesion, and insusceptibility to atmospheric corrosion in a saline environment. Thus, the achieved LPGSG-lanthanide hybrid organic-inorganic material could effectively serve as a color conversion layer for displays. English MDPI Open Access Publishing Lanthanide and Ladder-Structured Polysilsesquioxane Composites for Transparent Color Conversion Layers Article 10.3390/ma16062537 1 Materials, v.16, no.6 Materials 16 6 Y scie scopus 000958891000001 Chemistry, Physical Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Physics, Applied Physics, Condensed Matter Chemistry Materials Science Metallurgy & Metallurgical Engineering Physics Article COMPLEXES POSS IONS ladder-structured polysilsesquioxane lanthanide color conversion layer transparent film