Interparticle Charge-Transport-Enhanced Electrochemiluminescence of Quantum-Dot Aerogels

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • Xuwen Gao - , Shandong University (Author)
  • Guocan Jiang - , Chair of Physical Chemistry, TUD Dresden University of Technology (Author)
  • Cunyuan Gao - , Shandong University (Author)
  • Anatol Prudnikau - , Chair of Physical Chemistry, TUD Dresden University of Technology (Author)
  • René Hübner - , Helmholtz-Zentrum Dresden-Rossendorf (Author)
  • Jinhua Zhan - , Shandong University (Author)
  • Guizheng Zou - , Shandong University (Author)
  • Alexander Eychmüller - , Chair of Physical Chemistry, TUD Dresden University of Technology (Author)
  • Bin Cai - , Shandong University (Author)

Abstract

Electrochemiluminescence (ECL) represents a widely explored technique to generate light, in which the emission intensity relies critically on the charge-transfer reactions between electrogenerated radicals. Two types of charge-transfer mechanisms have been postulated for ECL generation, but the manipulation and effective probing of these routes remain a fundamental challenge. Here, we demonstrate the design of quantum dot (QD) aerogels as novel ECL luminophores via a versatile water-induced gelation strategy. The strong electronic coupling between adjacent QDs enables efficient charge transport within the aerogel network, leading to the generation of highly efficient ECL based on the selectively improved interparticle charge-transfer route. This mechanism is further verified by designing CdSe-CdTe mixed QD aerogels, where the two mechanistic routes are clearly decoupled for ECL generation. We anticipate our work will advance the fundamental understanding of ECL and prove useful for designing next-generation QD-based devices.

Details

Original languageEnglish
Article numbere202214487
JournalAngewandte Chemie - International Edition
Volume62
Issue number2
Publication statusPublished - 9 Jan 2023
Peer-reviewedYes

External IDs

PubMed 36347831

Keywords

ASJC Scopus subject areas

Keywords

  • Charge Transfer, Electrochemiluminescence, Electrochemistry, Quantum Dots, Sol–Gel Processes