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Keywords:

  • electrochemiluminescence;
  • light-emitting devices;
  • color tuning;
  • redox reactions
Thumbnail image of graphical abstract

Color-tuning of electrochemiluminescence (ECL) emission by frequency modulation of the alternating-current (AC) applied to a single ECL cell containing two different luminescent molecules is demonstrated. Yellow light emission is observed for 1000 Hz AC, while white light is emitted when the frequency is switched to 300 Hz (figure). The ECL cells are simply fabricated by sandwiching an electrolyte solution between transparent electrodes.