Unknown

Dataset Information

0

Gram-Scale Synthesis of 41% Efficient Single-Component White-Light-Emissive Carbonized Polymer Dots with Hybrid Fluorescence/Phosphorescence for White Light-Emitting Diodes.


ABSTRACT: Fluorescent carbon dots (CDs) are compelling optical emitters to construct white light-emitting diodes (WLEDs). However, it remains a challenge to achieve large-scale and highly efficient single-component white-light-emissive CDs suitable for WLED applications. Herein, a low cost, fast processable, environmentally friendly, and one-step synthetic approach is developed for the preparation of gram-scale and highly efficient single-component white-light-emissive carbonized polymer dots (SW-CPDs). It is revealed that hybrid fluorescence/phosphorescence components cooperatively contribute to the emergence of white light emission. The SW-CPDs exhibit a record quantum yield (QY) of ?41% for the white light emission observed in solid-state CD systems, while the QY of the phosphorescence is ?23% under ambient conditions. Heavy doping of N and P elements as well as presence of covalently cross-linked polymer frameworks is suggested to account for the emergence of hybrid fluorescence/phosphorescence, which is supported by the experimental results and theoretical calculations. A WLED is fabricated by applying the SW-CPDs on an UV-LED chip, showing favorable white-light-emitting characteristics with a high luminous efficacy of 18.7 lm W-1 that is comparable to that of state-of-the-art WLEDs reported before.

SUBMITTER: Wang Z 

PROVIDER: S-EPMC7029630 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature

altmetric image

Publications

Gram-Scale Synthesis of 41% Efficient Single-Component White-Light-Emissive Carbonized Polymer Dots with Hybrid Fluorescence/Phosphorescence for White Light-Emitting Diodes.

Wang Zifei Z   Liu Yang Y   Zhen Shijie S   Li Xiaoxi X   Zhang Weiguang W   Sun Xun X   Xu Baoyuan B   Wang Xue X   Gao Zhenhua Z   Meng Xiangeng X  

Advanced science (Weinheim, Baden-Wurttemberg, Germany) 20200116 4


Fluorescent carbon dots (CDs) are compelling optical emitters to construct white light-emitting diodes (WLEDs). However, it remains a challenge to achieve large-scale and highly efficient single-component white-light-emissive CDs suitable for WLED applications. Herein, a low cost, fast processable, environmentally friendly, and one-step synthetic approach is developed for the preparation of gram-scale and highly efficient single-component white-light-emissive carbonized polymer dots (SW-CPDs). I  ...[more]

Similar Datasets

| S-EPMC5904154 | biostudies-literature
| S-EPMC8162942 | biostudies-literature
| S-EPMC4463941 | biostudies-literature
| S-EPMC4864437 | biostudies-other
| S-EPMC7214519 | biostudies-literature
| S-EPMC6662328 | biostudies-literature
| S-EPMC7477729 | biostudies-literature
| S-EPMC4437379 | biostudies-other
| S-EPMC6644152 | biostudies-literature
| S-EPMC7154098 | biostudies-literature