Reaction Mechanism and Improved Performance of Solution-Based Electrochemiluminescence Cell Driven by Alternating Current
Taiki Nobeshima, Kazuki Nakamura, Norihisa Kobayashi
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65% confidenceAn AC-driven electrochemiluminescence cell was fabricated and showed improved properties compared to a DC-ECL cell, with luminance of 56.4 cd/m², current efficiency of 0.78 cd/A, and turn-on response time of 15 ms.
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Abstract
An AC-driven light-emitting cell based on the electrochemiluminescence (ECL) of tris(2,2'-bipyridyl)ruthenium(II) [Ru(bpy) 3 2+ ] was fabricated by simply placing the electrolyte solution between transparent electrodes, and this AC-driven ECL cell was demonstrated for comparison to a DC-ECL cell. The properties of the ECL cell were dramatically improved by using the AC method. The AC-ECL cell showed the luminance of 56.4 cd/m 2 , the current efficiency of 0.78 cd/A and the turn-on response time of ca. 15 ms under application of 4 V, 50 Hz AC. We also elucidated the detailed mechanisms of the AC-ECL reaction to monitor the faradaic current. These improved properties and the frequency dependence of the AC-ECL cell were discussed in the relation to the revealed mechanisms.
Key findings
- The AC-ECL cell showed improved luminance and current efficiency compared to the DC-ECL cell.
- The AC-ECL cell had a turn-on response time of 15 ms, which is faster than the DC-ECL cell.
- The AC-ECL reaction mechanism was elucidated by monitoring the faradaic current.
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Identifiers
- Journal
- Japanese Journal of Applied Physics
- Year
- 2013