title: Towards efficient solid-state photoluminescence based on carbon-nanodots and starch composites.
abstract: A new type of environmentally friendly phosphor based on carbon nanodots (CDs) has been developed through the dispersion of CDs by integrating the CDs with starch particles. The starch particles contain large numbers of hydroxyl groups around the surfaces, which can effectively absorb the CDs, whose surfaces are functionalized by lots of carboxyl and amide groups, through hydrogen bonding. Effective dispersion of CDs on the surfaces of starch particles can suppress the non-radiative decay processes and photoluminescence (PL) quenching induced by aggregation of CDs. The starch matrix neither competes for absorbing excitation light nor absorbs the emissions of CDs, which leads to efficient PL emitting. As a result, the starch/CD phosphors with a quantum yield of ∼50% were obtained. The starch/CD phosphors show great potential in phosphor-based light emitting diodes, temperature sensors, and patterning.
authors.affiliation: State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 3888 Eastern South Lake Road, Changchun, Jilin 130033, China. qusn@ciomp.ac.cn shendz@ciomp.ac.cn.
authors.forename: Mingye
authors.initials: M
authors.lastname: Sun
authors.forename: Songnan
authors.initials: S
authors.lastname: Qu
authors.forename: Zhendong
authors.initials: Z
authors.lastname: Hao
authors.forename: Wenyu
authors.initials: W
authors.lastname: Ji
authors.forename: Pengtao
authors.initials: P
authors.lastname: Jing
authors.forename: Hong
authors.initials: H
authors.lastname: Zhang
authors.forename: Ligong
authors.initials: L
authors.lastname: Zhang
authors.forename: Jialong
authors.initials: J
authors.lastname: Zhao
authors.forename: Dezhen
authors.initials: D
authors.lastname: Shen