Abstract
AbstractVisible light emission can be stimulated by applying a cyclic bias to a porous silicon/tri‐n‐propylamine (PS/TPrA) solid/liquid system. With the presence of 2.5 mM TPrA, the electrochemiluminescence intensity of the in situ formed PS electrode is 450 times higher than the blank solution. An applied voltage as low as 1.2 V is capable of generating light emission, indicating that current‐induced chemical reactions are an aid to the generation of charge carriers. A mechanism involving oxidation of TPrA followed by hole injection is proposed. The system also shows good ECL stability. In addition, the ECL emission can be inhibited by diphenols rather than phenol.
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