Electrical bistable devices using composites of zinc sulfide nanoparticles and poly-(N-vinylcarbazole)

doi:10.1088/1674-1056/24/3/037201

Abstract N-dodecanethiol capped zinc sulfide (ZnS) nanocrystals were synthesized by the one-pot approach and blended with poly (N-vinylcarbazole) (PVK) to fabricate electrical bistable devices. The corresponding devices did exhibit electrical bistability and negative differential resistance (NDR) effects. A large ON/OFF current ratio of 10⁴ at negative voltages was obtained by applying different amplitudes of sweeping voltage. The observed conductance switching and the negative differential resistance are attributed to the electric-field-induced charge transfer between the nanocrystals and the polymer, and the charge trapping/detrapping in the nanocrystals.

Keywords: electrical bistable devices ON/OFF current ratio electric-field-induced charge transfer trapping/detrapping

Received: 19 August 2014
Revised: 05 November 2014
Accepted manuscript online:

PACS:	72.20.-i	(Conductivity phenomena in semiconductors and insulators)
	73.40.-c	(Electronic transport in interface structures)
	77.55.dj	(For nonsilicon electronics (Ge, III-V, II-VI, organic electronics))
	79.60.Fr	(Polymers; organic compounds)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61377028), the Natural Science Funds for Distinguished Young Scholar, China (Grant No. 61125505), and the Fundamental Research Funds for the Central Universities, China (Grant No. 2014JBZ009).

Corresponding Authors: Hu Yu-Feng, Teng Feng
E-mail: yfhu@bjtu.edu.cn;fteng@bjtu.edu.cn

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Cao Ya-Peng (曹亚鹏), Hu Yu-Feng (胡煜峰), Li Jian-Tao (李剑焘), Ye Hai-Hang (叶海航), Lü Long-Feng (吕龙锋), Ning Yu (宁宇), Lu Qi-Peng (鲁启鹏), Tang Ai-Wei (唐爱伟), Lou Zhi-Dong (娄志东), Hou Yan-Bing (侯延冰), Teng Feng (滕枫) Electrical bistable devices using composites of zinc sulfide nanoparticles and poly-(N-vinylcarbazole) 2015 Chin. Phys. B 24 037201

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Electrical bistable devices using composites of zinc sulfide nanoparticles and poly-(N-vinylcarbazole)

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