PDF《钱新明电荷转移特性的影响》

2 导带高约 0.

5 eV , 这使光激发到 CdS 导带上的电子很容 易注入到 T iO

2 导带上, 加上敏化后减少了 T iO

2 表面态密度, 从而增加了向 ITO 电极传递的电子密 度, 阻止了CdS 上光生载流子的复合 . 另外, T iO

2 及CdS 之间形成的能垒可阻止光生电子向溶液中转 移, 减少了电极 电解质界面的法拉第电流, 从而提高了阳极光电流的响应. 但如何控制CdS 纳米微粒 粒径及其覆盖度是提高阳极光电流响应的又一重要环节 . 感谢北京大学蔡生民教授为本文光电化学测试所提供的帮助 . 参考文献1O'

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522 Effect on the Property of the Photoinduced Carr ier Tran sport of CdS as Sen sitizer for Ti O2 Nanoparticulate Thin F ilm s Q I AN X in2 M ing

1 , SON G Q ing

2 , BA I Yu2 Bai

23 , L I T ie2J in

2 , TAN G X in2Yi

2 , DON G Shao2 Jun

1 , WAN G Er2Kang

1 (1. Changchun Insititute of A pp lied Chem istry , Chinese A cademy of S ciences, Changchun 130022, China;

2. D ep artm ent of Chem istry , J ilin U niversity , Changchun 130023, China) Abstract The T iO

2 nanoparticle thin film s have been sensitized in situ w ith CdS nanoparticles. The SPS m easurem ent show ed that large surface state density w as p resent on the T iO ........