Effect of ion migration in electro-generated chemiluminescence depending on the luminophore types and operating conditions

Sangbaie Shin, Yun Sung Park, Sunghwan Cho, Insang You, In Seok Kang, Hong Chul Moon, Unyong Jeong

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

Electro-generated chemiluminescence (ECL) has attracted increasing attention as a new platform for light-emitting devices; in particular, the use of mechanically stretchable ECL gels opens up the opportunity to achieve deformable displays. The movements of radical ions under an external electric field include short-range diffusion near the electrodes and long-distance migration between the electrodes. So far, only the diffusion of radical ions has been considered as the operating principle behind ECL. In this study, electrochemical and optical analysis was performed systematically to investigate the role of ion migration in ECL devices. This study reveals that long-distance migration of radical ions can be a key variable in ECL at low frequencies and that this effect depends on the type of ion species and the operating conditions (e.g. voltage and frequency). We also report that the emissions from the two electrodes are not identical, and the emission behaviors are different in the optimal operating conditions for the red, green, and blue ECL emissions.

Original languageEnglish
Pages (from-to)2480-2488
Number of pages9
JournalChemical Science
Volume9
Issue number9
DOIs
StatePublished - 7 Mar 2018

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