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Electrical transport properties of an isolated CdS microrope composed of twisted nanowires
Gui-Feng Yu1, Miao Yu2, Wei Pan3
1Collaborative Innovation Center for Low-Dimensional Nanomaterials and Optoelectronic Devices, Qingdao University, Qingdao, 266071 People's Republic of China ; College of Physics, Qingdao University, Qingdao, 266071 People's Republic of China ; College of Science and Information, Qingdao Agricultural University, Qingdao, 266109 People's Republic of China.
Abstract:
CdS is one of the important II-VI group semiconductors. In this paper, the electrical transport behavior of an individual CdS microrope composed of twisted nanowires is studied. It is found that the current-voltage (I-V) characteristics show two distinct power law regions from 360 down to 60 K. Space-charge-limited current (SCLC) theory is used to explain these temperature- and electric-field-dependent I-V curves. The I-V data can be well fitted by this theory above 100 K, and the corresponding carrier mobility, trap energy, and trap concentration are also obtained. However, the I-V data exhibit some features of the Coulomb blockade effect below 80 K.
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