Optical properties and electrical bistability of CdS nanoparticles synthesized in dodecanethiol

Aiwei Tang; Feng Teng; Yanbing Hou; Yongsheng Wang; Furui Tan; Shengchun Qu; Zhanguo Wang
April 2010
Applied Physics Letters;4/19/2010, Vol. 96 Issue 16, p163112
Academic Journal
We reported the synthesis of CdS semiconductor nanoparticles using a simple one-pot reaction by thermolysis of cadmium acetylacetonate in dodecanethiol. Optical measurements of the as-obtained CdS nanoparticles revealed that their optical properties were closely related to surface effects. Based upon the cocktail of poly(N-vinylcarbazole) (PVK) and CdS nanoparticles, a bistable device was fabricated by a simple solution processing technique. Such a device exhibited a remarkable electrical bistability, which was attributed to the electric field-assisted charge transfer between PVK and the CdS nanoparticles capped by dodecaethiol. The conduction mechanism changed from an injection-controlled current to a bulk-controlled one during switching from OFF-state to ON-state.


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