Extension of phosphorescence and delayed fluorescence lifetime of carbon dots using substrate-assisted method

IF 13.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Chemical Engineering Journal Pub Date : 2024-12-18 DOI:10.1016/j.cej.2024.158747

Minjuan Cai, Huakai Qiu, Xiaoping Chen, Xudong Wang, Zhixiong Cai

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引用次数: 0

Abstract

Enhancing excitons utilization efficiency is critical for luminescent materials, particularly concerning the harvesting of triplet excitons. Controlling the excited-state dynamics thus plays a pivotal role in modulating room-temperature phosphorescence (RTP) and thermally activated delayed fluorescence (TADF) emissions. In this work, six similar carboxylic acids were selected as precursors to synthesize six kinds of carbon dots (CDs) via simple hydrothermal method. Subsequently, CD-based borate composites were developed through a matrix-assisted method using boric acid (BA), resulting in electron-transfer-enhanced afterglows with varying lifetimes, attributed to the inorganic electronic defects within the matrix. By fine-tuning the precursor structure in conjunction with the BA matrix, the interplay between TADF and RTP was effectively modulated. Notably, the CDs@BA composites exhibited quite different afterglow emission properties, due to the confinement effects of physical immobilization, enabling differentiation between TADF and RTP. These results provide a model for fabricating multimodal afterglow materials based on CDs.

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来源期刊

Chemical Engineering Journal 工程技术-工程：化工

CiteScore

21.70

自引率

9.30%

发文量

6781

审稿时长

2.4 months

期刊介绍： The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.