Photoactivity of p-Type α-Fe2O3 Induced by Anionic/Cationic Codoping of N and Zn
Photoactivity of p-Type α-Fe2O3 Induced by Anionic/Cationic Codoping of N and Zn
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DOI：
10.7567/apex.6.041201
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发表时间：
2013-03
影响因子：
2.3
通讯作者：
T. Morikawa;T. Arai;T. Motohiro
中科院分区：
文献类型：
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作者：
T. Morikawa;T. Arai;T. Motohiro
在N2和Ar的混合气体中，通过共溅射Fe 2 O3和ZnO，然后进行退火，制备了N，Zn共掺杂的p型α-Fe 2 O3，带隙为2.0eV。光电化学测试表明，N，Zn-Fe_2 O_3具有典型的阴极光电流，其光电流来源于p型导电。它还显示出非常高的光电流，很可能源于比N-和Zn-Fe 2 O3更高浓度的受体。X射线光电子能谱表明，N和Zn离子可以驻留在最近的邻居，以稳定的p型字符。N，Zn-Fe_2 O_3与合适的助催化剂结合，在光能转化方面有很好的应用前景。
N,Zn-codoped Fe2O3, a p-type α-Fe2O3 with a band gap of 2.0 eV, was developed by cosputtering of Fe2O3 and ZnO in a plasma mixture of N2 and Ar, followed by post-annealing. Photoelectrochemical measurement revealed that N,Zn-Fe2O3 exhibits a typical cathodic photocurrent originating from the p-type conduction. It also showed a very high photocurrent, most likely originating from a higher concentration of acceptors than those of N- and Zn-Fe2O3. X-ray photoemission spectroscopy suggested that N and Zn ions could reside at the nearest neighbor to stabilize the p-type character. N,Zn-Fe2O3 could be promising in photoenergy conversion when combined with appropriate co-catalysts.