【摘要】 研究了不同α-Fe2 O3纳米晶薄膜厚度及不同光照方向时α-Fe2 O3/ ITO电极在 KCl溶液中的光电化学行为 ,发现当膜的厚度增加时 ,光电流响应减弱 .当膜的厚度较薄 (5 0μm)时 ,正、反两面光照对光电流的响应几乎不会产生影响 ,而当膜较厚 (1 0 0μm)时 ,反面光照的光电流响应更强 .更多还原

【Abstract】 The photoelectrochemistry of α Fe 2O 3 nanocrystalline thin films with different thickness in KCl solution was studied. It is found that the photocurrent response was decreased with the film thinkness. The decrease of photocurrent responses of thicker films is explained in terms of the electric resistance effect and recombination effect. For thinner α Fe 2O 3 film (50 μm) no difference was found for the photocurrent response under frontwall (FW) and backwall (BW) illuminations, while for thicker α Fe 2O 3 film (100 μm) the photocurrent response was larger under BW illumination than that under FW illumination.更多还原