Efficient Electrochemiluminescence devices using Pd Nanoparticle-Anchored TiO2 nanorod electrodes with high catalytic activity

Ju Won Oh, Ashkan Vakilipour Takaloo, Sung Doo Baek, Jae Min Myoung

Research output: Contribution to journalArticlepeer-review

Abstract

Electrochemiluminescence devices (ECLDs) have several advantages over organic light-emitting diodes (OLEDs), such as simple structure, low fabrication cost, and manufacturability under air ambience. However, the low light-emission efficiency of ECLDs limits their commercial applications. In this study, a Pd nanoparticle (NP)-anchored TiO2 nanorod (NR) electrode (PTNE) is used to enhance the light-emission properties of ECLDs. The electrochemical catalytic properties of the Pd NPs are analyzed using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) as a function of the Pd NP size. The PTNE-based ECLDs with the optimal size of Pd NPs exhibit significant reduction in the minimum driving voltage for multi-color ECLDs than that for the ECLDs with FTO and bare TiO2-NR electrodes. This improvement is achieved by maximizing the surface-to-volume ratio of the electrodes and enhancing the electron transfer rate between the Pd NP catalysts and luminophores of the ECL composite solution.

Original languageEnglish
Article number152864
JournalApplied Surface Science
Volume586
DOIs
Publication statusPublished - 2022 Jun 1

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIT) ( No. 2019R1A2C1085628 ) and Sung-Doo Baek was supported by the Korea Initiative for fostering the University of Research and Innovation (KIURI) Program of the National Research Foundation (NRF) funded by the Korean government (MSIT) ( No. NRF-2020M3H1A1077207 ).

Publisher Copyright:
© 2022 Elsevier B.V.

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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