標題: | Effects of cross-sectional area on the tunneling-junction array in octahedral PbSe colloidal-nanocrystal solids |
作者: | Chiu, Shao-Chien Jhang, Jia-Sin Chen, Jenn-Fang Fang, Jiye Jian, Wen-Bin 電子物理學系 Department of Electrophysics |
公開日期: | 2013 |
摘要: | Octahedral PbSe colloidal nanocrystals (NCs) are used to assemble a solid. Because of the special feature of the apexes of the octahedrons, the cross-sectional area of the inter-dot tunneling junctions is much smaller than that formed between spherical NCs. The inter-dot separation between NCs is easily adjusted by mild thermal treatment. Like a spherical NC-solid, the resistance of the octahedral NC-solid is exponentially dependent on the inter-dot separation. On the contrary, due to the difference in the cross-sectional area between the NCs, electron transport in the octahedral NC-solid does not follow the same model used for the explanation of electron transport in a spherical NC-solid. Through analyses of current-voltage and resistance-temperature behaviors, we have confirmed that the model of fluctuation-induced tunneling conduction fits very well with all of the data and explains the variation in the electrical properties of octahedral PbSe colloidal NC-solids after thermal annealing. |
URI: | http://hdl.handle.net/11536/22824 http://dx.doi.org/10.1039/c3cp52083h |
ISSN: | 1463-9076 |
DOI: | 10.1039/c3cp52083h |
期刊: | PHYSICAL CHEMISTRY CHEMICAL PHYSICS |
Volume: | 15 |
Issue: | 38 |
起始頁: | 16127 |
結束頁: | 16131 |
顯示於類別: | 期刊論文 |