基于 PVK/PbS 纳米晶有机无机复合薄膜电双稳器件性能研究

刘娟; 李云白; 侯延冰; 王越; 吕龙峰
July 2016
Chinese Journal of Liquid Crystal & Displays;Jul2016, Vol. 31 Issue 7, p643
Academic Journal
An organic/inorganic composite electrical bistable device has been fabricated by utilizing hybrid lead sulfide (PbS) nanocomposite and poly (N-vinylcarbazole) (PVK) film. And the device performance has been tested in order to analyze the charge transport mechanism. First,the cube-shaped PbS nanocrystals were synthesized by the thermal injection method, then electrical bistable device was fabricated by utilizing composite of poly (N-vinylcarbazole) and lead sulfide nanocrystals as the active layer.The device exhibits significant electrical bistability and repeatable operation of "read-write-read-erase" is also achieved. The maximum current ratio between the high-conducting state (ON state) and low-conducting state (OFF state) can reach up to 104. The carrier transport mechanisms in the positive voltage region of the ON state and OFF state are described by using different conduction models, respectively.The observed conductance switching is attributed to the electric-field-induced charge transfer between the nanocrystals and the polymer, and charge trapping/detrapping in the nanocrystals.


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