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Electrochemical luminescence of ZnGa_2O_4 semiconductor electrodes activated with Cr and CO

机译:Cr和CO激活的ZnGa_2O_4半导体电极的电化学发光

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摘要

Electrochemical luminescence of ZnGa_2O_4:Cr and ZnGa_2O_4:Co semiconductor electrodes was studied. Under cathodic polarization in Na_2S_2O_8 electrolyte, these electrodes generated emission of ZnGa_2O_4 with a broad band from 350 to 650 nm together with red emission attributed to Cr~(3+) and Co~(2+). These emissions are explained by recombination between electrons and holes. Under anodic bias in Na_2SO_4 electrolyte, only the red emission was observed, accompanied with a sharp rise of anodic current at ca. +12.5 V.The emissions were explained by collison excitation of Cr~(3+) and Co~(2+) emission centers owing to avalanche breakdown.
机译:研究了ZnGa_2O_4:Cr和ZnGa_2O_4:Co半导体电极的电化学发光。在Na_2S_2O_8电解质中的阴极极化作用下,这些电极产生ZnGa_2O_4的发射,该发射带具有350至650 nm的宽带,并产生归因于Cr〜(3+)和Co〜(2+)的红色发射。这些发射通过电子和空穴之间的复合来解释。在Na_2SO_4电解质中的阳极偏压下,仅观察到红色发射,并伴随着约200℃的阳极电流急剧上升。 +12.5V。这种排放是由于雪崩击穿导致了Cr〜(3+)和Co〜(2+)发射中心的碰撞激发而解释的。

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