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两步法制备多孔硅及其表征II :脉冲电流法(英文)
Authors
刘峰名
林昌健
+4 more
温作新
田中群
程璇
薛茹
Publication date
25 March 2001
Publisher
Abstract
采用脉冲阳极 /阴极电流和化学氧化两步法分别在 1∶1的氢氟酸和乙醇溶液中及 2 0 %硝酸溶液中制备出孔径约为 0 .5~ 3μm ,厚度大约为 10~ 2 0 μm的多孔硅样品 ,将获得的多孔硅结构再进一步用扫描电子显微镜和拉曼光谱仪进行表面形貌和光学性质的考察 .与恒电流 -化学氧化两步法制得的多孔硅相比 ,用脉冲电流法得到的多孔硅的孔径范围较大 ,且多孔层较厚 .制备时加紫外光照显著提高了多孔硅的厚度 ,并发生“蓝移”现象 .用脉冲电流法制得的多孔硅在老化后 (在干燥器放置一年 )同样观察到光致发光明显增强
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Last time updated on 16/06/2016