Electron−phonon interactions in Ce3+-doped yttrium aluminum garnet nanophosphors

• Main Authors: Su, Liap Tat, Zhao, Yang, Ng, Nathaniel, Boey, Freddy Yin Chiang, Woodhead, J. L., Summers, C. J., Tok, Alfred Iing Yoong
• Other Authors: School of Materials Science & Engineering
• Format: Article
• Language: English
• Published: 2011
• Subjects: DRNTU::Engineering::Materials::Photonics and optoelectronics materials
• Online Access: https://hdl.handle.net/10356/93519; http://hdl.handle.net/10220/7408
• Institution: Nanyang Technological University

Ce3+-doped yttrium aluminum garnet nanophosphors with sizes near 30 and 250 nm have been synthesized by using chemical gelation and solvothermal methods, respectively. The size-dependent electron-longitudinal-optical-phonon coupling is investigated by fitting measured photoluminescence spectra within the framework of the Brownian oscillator model. Results show that the coupling strength is in a decreasing order from the bulk material to the nanophosphors of much smaller sizes.