Open AccessHydrogen Peroxide‐Treated Carbon Dot Phosphor with a Bathochromic‐Shifted, Aggregation‐Enhanced Emission for Light‐Emitting Devices and Visible Light Communication
Author(s) -
Zhou Zhengjie,
Tian Pengfei,
Liu Xiaoyan,
Mei Shiliang,
Zhou Ding,
Li Di,
Jing Pengtao,
Zhang Wanlu,
Guo Ruiqian,
Qu Songnan,
Rogach Andrey L.
Publication year - 2018
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.201800369
Subject(s) - phosphor , bathochromic shift , photoluminescence , materials science , green light , luminescence , quantum yield , visible spectrum , optoelectronics , photochemistry , hydrogen peroxide , chemistry , optics , fluorescence , blue light , physics , organic chemistry
It is demonstrated that treatment of blue‐emissive carbon dots (CDs) with aqueous hydrogen peroxide (H 2 O 2 ) results in the green emissive solid state CD phosphor with photoluminescence quantum yield of 25% and short luminescence lifetime of 6 ns. The bathochromic‐shifted, enhanced green emission of H 2 O 2 ‐treated CDs in the powder is ascribed to surface state changes occurring in the aggregated material. Using the green emissive H 2 O 2 ‐treated CD phosphor, down‐conversion white‐light‐emitting devices with cool, pure, and warm white light are fabricated. Moreover, using the green emissive CD phosphor as a color converter, a laser‐based white‐light source is realized, and visible light communication with a high modulation bandwidth of up to 285 MHz and data transmission rate of ≈435 Mbps is demonstrated.