Observed coexistence of memristive, memcapacitive and meminductive characteristics in polyvinyl alcohol/cadmium sulphide nanocomposites

被引：22

作者：

Sarma, Sweety ^{[1
]}

Mothudi, Bakang Moses ^{[1
]}

Dhlamini, Mokhotjwa Simon ^{[1
]}

机构：

[1] Univ S Africa, Dept Phys, Johannesburg, South Africa

来源：

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS | 2016年 / 27卷 / 05期

基金：

新加坡国家研究基金会;

关键词：

CADMIUM-SULFIDE; QUANTUM DOTS; ELECTRICAL-PROPERTIES; CDS NANOCRYSTALLITES; OPTICAL-PROPERTIES; SIZE; TRANSFORMATION; NANOPARTICLES; CELL;

D O I：

10.1007/s10854-016-4330-y

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Undoped and copper doped cadmium sulphide nanoparticles embedded in polyvinyl alcohol matrix (PVA/CdS) were synthesized by adopting chemical route. The effects of doping with Cu on the structural, optical and electrical properties of the as-prepared samples are reported. X-ray diffraction (XRD) results showed a mixed phase of cubic and hexagonal in the Cu-doped samples and only cubic phase was observed in the undoped sample. The estimated crystallite/particle size from the XRD, HRSEM and HRTEM is in the range of 2-10 nm. UV-Vis revealed blue shift of the absorption wavelength suggesting quantum confinement. Photoluminescence emission shows red shifting of emission peaks in Cu-doped PVA/CdS samples in comparison to undoped PVA/CdS. Two terminal electrochemical devices were fabricated, with the as-synthesized undoped and copper doped PVA/CdS NC samples as the active layer on ITO coated glass slide and silver (Ag) electrodes. I-V characteristics of the as-fabricated Ag/PVA/CdS NCs/ITO devices exhibit non-zero crossing hysteresis behaviour. The observed behaviour suggests co-existence of extended memristive characteristics with memcapacitive/meminductive characteristics classified as characteristic of extended memelements.

引用

页码：4551 / 4558

页数：8

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