title: Bandgap Tailoring via Si Doping in Inverse-Garnet Mg3Y2Ge3O12:Ce(3+) Persistent Phosphor Potentially Applicable in AC-LED.
abstract: The state-of-the-art alternating-current light-emitting diode (AC-LED) technique suffers from adverse lighting flicker during each AC cycle. Aiming to compensate the dimming time of AC-LED, herein, we report a novel Mg3Y2(Ge1-xSix)3O12:Ce(3+) inverse-garnet persistent phosphor whose afterglow is efficiently activated by blue light with persistent luminescence in millisecond range. It is experimentally demonstrated that Si doping tailors the host bandgap, so that both the electron charging and detrapping in the persistent luminescence process are optimized. To explore the origin of the millisecond afterglow, we performed a series of thermoluminescence analyses, revealing three types of continuously distributed traps in the host. Finally, an AC-LED prototype device was fabricated, which exhibits the warm white emission with a reduced percent flicker of 71.7%. These results demonstrate that the newly developed persistent phosphor might be a promising candidate applicable in low flickering AC-LED which has advantages of cheaper price, longer lifetime, and higher energy utilization efficiency.
authors.affiliation: Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , Fuzhou, Fujian 350002, People's Republic of China.|Fujian Provincial Key Laboratory of Nanomaterials , Fuzhou, Fujian 350002, People's Republic of China.
authors.forename: Hang
authors.initials: H
authors.lastname: Lin
authors.affiliation: Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , Fuzhou, Fujian 350002, People's Republic of China.|Fujian Provincial Key Laboratory of Nanomaterials , Fuzhou, Fujian 350002, People's Republic of China.
authors.forename: Ju
authors.initials: J
authors.lastname: Xu
authors.affiliation: Instrumentation Analysis and Research Center, Fuzhou University , Fuzhou, Fujian 350002, People's Republic of China.
authors.forename: Qingming
authors.initials: Q
authors.lastname: Huang
authors.affiliation: Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , Fuzhou, Fujian 350002, People's Republic of China.
authors.forename: Bo
authors.initials: B
authors.lastname: Wang
authors.affiliation: Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , Fuzhou, Fujian 350002, People's Republic of China.
authors.forename: Hui
authors.initials: H
authors.lastname: Chen
authors.affiliation: Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , Fuzhou, Fujian 350002, People's Republic of China.
authors.forename: Zebin
authors.initials: Z
authors.lastname: Lin
authors.affiliation: Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , Fuzhou, Fujian 350002, People's Republic of China.|Fujian Provincial Key Laboratory of Nanomaterials , Fuzhou, Fujian 350002, People's Republic of China.
authors.forename: Yuansheng
authors.initials: Y
authors.lastname: Wang
keywords: LED; flicker effect; persistent luminescence; phosphors; trap