Electrochemistry
Online ISSN : 2186-2451
Print ISSN : 1344-3542
ISSN-L : 1344-3542
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Bright Yellow Electrogenerated Chemiluminescence Cell Using a Rubrene Solution Doped with an Emitting Assist Dopant
Emiri KATORyoichi ISHIMATSUJun MIZUNOTakashi KASAHARA
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2023 年 91 巻 4 号 p. 047002

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We demonstrated that the electrogenerated chemiluminescence (ECL) performances of 5,6,11,12-tetraphenyltetracene (rubrene)-based devices can be significantly enhanced by using an emitting assist dopant. We prepared an ECL solution by dissolving rubrene and 4-(di-p-tolylamino)-4′-[(di-p-tolylamino)styryl]stilbene (DPAVB) in an organic solvent. A microfluidic ECL cell having the prepared solution exhibited a bright yellow ECL emission from rubrene with a maximum luminance of 292 cd m−2 at 6.0 V and a maximum current efficiency of 4.50 cd A−1 at 5.5 V. Moreover, a current efficiency of over 3.0 cd A−1 was maintained from 3.0 to 6.5 V. Furthermore, the device lifetime was improved in comparison with the rubrene solution without DPAVB. The emission mechanism was discussed using cyclic voltammogram data. The DPAVB molecule was found to be more readily oxidized and more difficult to be reduced than rubrene. The excited rubrene molecules were expected to be produced efficiently in the device by the electron transfer reactions between rubrene•− and DPAVB•+ as well as rubrene•− and rubrene•+. Based on the findings, we concluded that the enhanced device characteristics were primarily attributed to the well-balanced generation of radical cations and anions.

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© The Author(s) 2023. Published by ECSJ.

This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium provided the original work is properly cited. [DOI: 10.5796/electrochemistry.23-00007].
http://creativecommons.org/licenses/by/4.0/
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