スルホサリチル酸-硫酸系溶液で生成するアルミニウムアノード酸化皮膜のフォトルミネッセンス

抄録

Photoluminescent centers and their distribution in the anodic alumina films formed in the mixed electrolyte of sulfosalicylic acid (SSA) and sulfuric acid were investigated; the behaviors of incorporations of the SSA anions into the oxide during anodization were discussed. It was found that the photoluminescent centers were the SSA anions locating on the surface region within-30Å of the cell walls of the oxide and no photoluminescent centers were detected in the inner region of the cell walls. These results suggest that SSA anions cannot enter into the oxide during anodization. This must be the reason why no electroluminescence appears during anodization when the SSA electrolyte is employed. Furthermore, self-coloring and electron spin resonance (ESR) characteristics were observed in the inner region of the cell walls of oxide which contained no photoluminescent centers. Thus it was clarified that photoluminescent centers were different from the colored materials and ESR centers concerning the anodic alumina films formed in the electrolyte mentioned above.