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Title: Charge transport and memristive properties of graphene quantum dots embedded in poly(3-hexylthiophene) matrix

Abstract

We show that graphene quantum dots (GQD) embedded in a semiconducting poly(3-hexylthiophene) polymeric matrix act as charge trapping nanomaterials. In plane current-voltage (I-V) measurements of thin films realized from this nanocomposite deposited on gold interdigitated electrodes revealed that the GQD enhanced dramatically the hole transport. I-V characteristics exhibited a strong nonlinear behavior and a pinched hysteresis loop, a signature of a memristive response. The transport properties of this nanocomposite were explained in terms of a trap controlled space charge limited current mechanism.

Authors:
; ; ; ; ;  [1];  [1];  [2]
  1. National Institute for R and D in Microtechnologies, 72996, Bucharest (Romania)
  2. (Romania)
Publication Date:
OSTI Identifier:
22311350
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 8; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; CHARGE TRANSPORT; CURRENTS; ELECTRIC CONDUCTIVITY; ELECTRIC POTENTIAL; GOLD; GRAPHENE; HYSTERESIS; MATRIX MATERIALS; NANOCOMPOSITES; NONLINEAR PROBLEMS; QUANTUM DOTS; SPACE CHARGE; THIN FILMS; TRAPPING

Citation Formats

Cosmin Obreja, Alexandru, Cristea, Dana, Radoi, Antonio, Gavrila, Raluca, Comanescu, Florin, Kusko, Cristian, E-mail: cristian.kusko@imt.ro, Mihalache, Iuliana, and Physics Department, University Bucharest, P.O. Box MG-11, 077125 Bucharest. Charge transport and memristive properties of graphene quantum dots embedded in poly(3-hexylthiophene) matrix. United States: N. p., 2014. Web. doi:10.1063/1.4893919.
Cosmin Obreja, Alexandru, Cristea, Dana, Radoi, Antonio, Gavrila, Raluca, Comanescu, Florin, Kusko, Cristian, E-mail: cristian.kusko@imt.ro, Mihalache, Iuliana, & Physics Department, University Bucharest, P.O. Box MG-11, 077125 Bucharest. Charge transport and memristive properties of graphene quantum dots embedded in poly(3-hexylthiophene) matrix. United States. doi:10.1063/1.4893919.
Cosmin Obreja, Alexandru, Cristea, Dana, Radoi, Antonio, Gavrila, Raluca, Comanescu, Florin, Kusko, Cristian, E-mail: cristian.kusko@imt.ro, Mihalache, Iuliana, and Physics Department, University Bucharest, P.O. Box MG-11, 077125 Bucharest. Mon . "Charge transport and memristive properties of graphene quantum dots embedded in poly(3-hexylthiophene) matrix". United States. doi:10.1063/1.4893919.
@article{osti_22311350,
title = {Charge transport and memristive properties of graphene quantum dots embedded in poly(3-hexylthiophene) matrix},
author = {Cosmin Obreja, Alexandru and Cristea, Dana and Radoi, Antonio and Gavrila, Raluca and Comanescu, Florin and Kusko, Cristian, E-mail: cristian.kusko@imt.ro and Mihalache, Iuliana and Physics Department, University Bucharest, P.O. Box MG-11, 077125 Bucharest},
abstractNote = {We show that graphene quantum dots (GQD) embedded in a semiconducting poly(3-hexylthiophene) polymeric matrix act as charge trapping nanomaterials. In plane current-voltage (I-V) measurements of thin films realized from this nanocomposite deposited on gold interdigitated electrodes revealed that the GQD enhanced dramatically the hole transport. I-V characteristics exhibited a strong nonlinear behavior and a pinched hysteresis loop, a signature of a memristive response. The transport properties of this nanocomposite were explained in terms of a trap controlled space charge limited current mechanism.},
doi = {10.1063/1.4893919},
journal = {Applied Physics Letters},
number = 8,
volume = 105,
place = {United States},
year = {Mon Aug 25 00:00:00 EDT 2014},
month = {Mon Aug 25 00:00:00 EDT 2014}
}