Electrochemiluminescence and Photoluminescence of Carbon Quantum Dots Controlled by Aggregation-Induced Emission, Aggregation-Caused Quenching, and Interfacial Reactions

Langmuir : the ACS Journal of Surfaces and Colloids
Jonathan Ralph AdsettsZhifeng Ding

Abstract

Carbon quantum dots (CQDs) show promise in optoelectronics as a light emitter due to simple synthesis, biocompatibility and strong tunable light emissions. However, CQDs commonly suffer from aggregation caused quenching (ACQ), inhibiting the full potential of these light emitters. Studies into different ideal light emitters have shown enhancements when converting common ACQ effects to aggregation induced emission (AIE) effects. We report CQD synthesis using citric acid and high/low thiourea concentrations, or sample 2/1. These two CQDs exhibited AIE and ACQ PL effects, respectively. CQD characterizations and photoluminescence interrogations of CQD films and solutions revealed that these unique emission mechanisms likely arose from different S incorporations into the CQDs. Furthermore, it was discovered that sample 2 emitted electrochemiluminescence (ECL) more intensely than sample 1 in a homogenous solution with S2O82- as a coreactant, due to aggregation and interactions of CQD species in solution. Very interestingly, sample 1's CQD film|S2O82- system achieved an ECL efficiency of 26% and emitted roughly 26 times more efficiently than sample 2 in the same conditions. Predominant interfacial reactions and surface state emission ...Continue Reading

References

Aug 25, 1995·Science·Q PeiA J Heeger
Apr 6, 2013·Chemical Reviews·Wipa SugintaAlbert Schulte
Dec 11, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Tanyu WangCurtis Shannon
Jan 30, 2014·ACS Applied Materials & Interfaces·Yuan XiongXiao-Wen Shi
Dec 22, 2015·Chemical Communications : Chem Comm·Ze Xi LiuCheng Zhi Huang
Jul 16, 2016·ACS Applied Materials & Interfaces·Kun YanXiao-Wen Shi
Nov 3, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·Selvaraj NaveenrajSambandam Anandan
Feb 6, 2017·Journal of the American Chemical Society·Cathrin D ErtlHenk J Bolink
Mar 28, 2019·Angewandte Chemie·Francesco ZinnaLorenzo Di Bari
Apr 25, 2019·International Journal of Pharmaceutics·Kofi Oti Boakye-YiadomBo Wang
Jun 11, 2019·Journal of the American Chemical Society·Jingjing ZhangHong-Yuan Chen
Jul 31, 2019·Nature·Toshinori MatsushimaChihaya Adachi
Oct 5, 2019·Chemical Communications : Chem Comm·Kaspars LeduskrastsEdgars Suna
Feb 28, 2020·Chemistry, an Asian Journal·Xiaoteng DingJinghong Li
Nov 3, 2020·Frontiers in Chemistry·Jonathan Ralph AdsettsZhifeng Ding

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