Modulating the electronic structure of a semiconductor to optimize its electrochemiluminescence performance

Wang, Xiaohong; Zhang, Miao; Huo, Xiao-Lei; Zhao, Wei; Kang, Bingyi; Xu, Jing‐Juan; Chen, Hong‐Yuan

doi:10.1039/c9na00011a

Cited by 15 publications

(11 citation statements)

References 28 publications

(42 reference statements)

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“…Wang et al thoroughly studied the ECL properties of CDs with different nitrogen doping concentrations. 72 They found that doping nitrogen can tune the electronic structure of the CDs and lead to widened band gap and slower decay dynamics. Accordingly, the increasing probability of radiative recombination relative to nonradiative recombination promoted the ECL performance.…”

Section: àmentioning

confidence: 99%

Carbon-based dots for electrochemiluminescence sensing

Chen

Cao

et al. 2020

Mater. Chem. Front.

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Section: àmentioning

confidence: 99%

Carbon-based dots for electrochemiluminescence sensing

Chen

Cao

et al. 2020

Mater. Chem. Front.

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“…[30][31][32][33][34][35][36] Known strategies for modulating the PL have been shown to affect the ECL properties as well. [30][31][32][33][34][35][36] For example, the ECL performance of CDs was promoted by introducing surface emissive sites through nitrogen and sulfur doping, [35 ] or reducing non-radiative recombination and enhancing radiative recombination through the variation of the nitrogen doping concentration. [36] Apart from the heteroatom doping strategy, introducing carbon-related dangling bonds on CDs and modulating the oxidation degree of the CD surface were shown to alter the CD ECL efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies reported the ECL properties of carbon-based dots (amorphous or graphitic and produced by either top-down or bottom-up approaches) by both annihilation and coreactant routes. [30][31][32][33][34][35][36] Known strategies for modulating the PL have been shown to affect the ECL properties as well. [30][31][32][33][34][35][36] For example, the ECL performance of CDs was promoted by introducing surface emissive sites through nitrogen and sulfur doping, [35 ] or reducing non-radiative recombination and enhancing radiative recombination through the variation of the nitrogen doping concentration.…”

Section: Introductionmentioning

confidence: 99%

Lighting up the Electrochemiluminescence of Carbon Dots through Pre‐ and Post‐Synthetic Design

et al. 2021

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Carbon dots (CDs), defined by their size of less than 10 nm, are a class of photoluminescent (PL) and electrochemiluminescent (ECL) nanomaterials that include a variety of carbon-based nanoparticles. However, the control of their properties, especially ECL, remains elusive and afflicted by a series of problems. Here, the authors report CDs that display ECL in water via coreactant ECL, which is the dominant mechanism in biosensing applications. They take advantage of a multicomponent bottom-up approach for preparing and studying the luminescence properties of CDs doped with a dye acting as PL and ECL probe. The dependence of luminescence properties on the surface chemistry is further reported, by investigating the PL and ECL response of CDs with surfaces rich in primary, methylated, or propylated amino groups. While precursors that contribute to the core characterize the PL emission, the surface states influence the efficiency of the excitation-dependent PL emission. The ECL emission is influenced by surface states from the organic shell, but states of the core strongly interact with the surface, influencing the ECL efficiency. These findings offer a framework of pre-and post-synthetic design strategies to improve ECL emission properties, opening new opportunities for exploring biosensing applications of CDs.

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“…The presence of nitrogen in CQDs alter the electronic structure causing widened band gap. Accordingly, the decay dynamics become slow 380. N, S co‐doped GQDs (NS‐GQDs) have more surface capturing centers of excitons than pure GQDs, which are able to capture many holes from sulphate ions (SO 4 2− ) to increase the ECL efficiency 381.…”

Section: Properties Of Carbon Quantum Dotsmentioning

confidence: 99%

Biomass‐derived Carbon Quantum Dots – A Review. Part 1: Preparation and Characterization

et al. 2021

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The preparation of nanostructured carbon materials from chosen biomass through hydrothermal carbonization and pyrolysis processes by optimizing the reaction conditions is one of the bases for applying the product in certain of the development activities. The finished product more or less reflects the raw material and the way of preparation. Among the many products, carbon quantum dots (CQDs) have gained importance due to their bolstered characteristics and facile preparation. CQDs are zero‐dimensional (0D) nanomaterials which attracted attention in the recent past due to their excellent water solubility, unique optical properties, good electrical conductivity, eco‐friendliness, and biocompatibility. Small‐sized CQDs offer high surface area per unit volume, strong tunable fluorescence, photo‐luminescent emissions, and semiconducting properties. In this paper, identification of ideal raw materials, process parameters being followed in the preparation of CQDs through hydrothermal carbonization and pyrolysis techniques, and the properties of the resultant CQDs commensurate with the nature of process are reviewed.

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Modulating the electronic structure of a semiconductor to optimize its electrochemiluminescence performance

Abstract: How the band gap and relaxation dynamics of a semiconductor affect its electrochemiluminescence performance was investigated.

Cited by 15 publications

References 28 publications

Carbon-based dots for electrochemiluminescence sensing

Carbon-based dots for electrochemiluminescence sensing

Lighting up the Electrochemiluminescence of Carbon Dots through Pre‐ and Post‐Synthetic Design

Biomass‐derived Carbon Quantum Dots – A Review. Part 1: Preparation and Characterization

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