TY - JOUR
T1 - Poly (3,4-ethylenedioxythiophene) (PEDOT) and poly (3,4- ethylenedioxythiophene)-few walled carbon nanotube (PEDOT-FWCNT) nanocomposite based thin films for Schottky diode application
AU - Gupta, Bhavana
AU - Mehta, Minisha
AU - Melvin, Ambrose
AU - Kamalakannan, R.
AU - Dash, S.
AU - Kamruddin, M.
AU - Tyagi, A. K.
N1 - Funding Information:
Authors are thankful to Dr. S. Dhara and Dr. P. K. Ajikumar and Dr. R. Pandian and Dr. K. Prabakar, SND, IGCAR for providing experimental facilities. Dr. Minisha Mehta gratefully acknowledges the financial support by Indira Gandhi Centre for Atomic Research , Department of Atomic Energy (DAE) for the Visiting Scientist Fellowship. Dr. Bhavana Gupta would like to thank DST for Inspire-Faculty Fellowship. Encouragements receive from Dr. C.S. Sunder, Director, MSG is sincerely acknowledged.
PY - 2014/10/15
Y1 - 2014/10/15
N2 - Transparent, conductive films of poly (3,4-ethylenedioxythiophene) (PEDOT) and poly (3,4-ethylenedioxythiophene)-few walled carbon nanotube (PEDOT-FWCNT) nanocomposite were synthesized by in-situ oxidative polymerization and investigated for their Schottky diode property. The prepared films were characterized by UV-Vis spectroscopy, thermal gravimetric analysis (TGA), surface resistivity, cyclic voltametery, scanning electron microscopy (SEM) and high resolution transmission electron microscopy (HRTEM). SEM reveals the formation of homogeneous and adhesive polymer films while HRTEM confirms the uniform wrapping of polymer chains around the nanotube walls for PEDOT-FWCNT film. Improved thermal stability, conductivity and charge storage property of PEDOT in the presence of FWCNT is observed. Among different compositions, 5 wt. % of FWCNT is found to be optimum with sheet resistance and transmittance of 500 Ω sq-1 and 77%, respectively. Moreover, the electronic and junction properties of polymer films were studied and compared by fabricating sandwich type devices with a configuration of Al/PEDOT or PEDOT-FWCNT nanocomposite/indium tin oxide (ITO) coated glass. The measured current density-voltage characteristics show typical rectifying behavior for both configurations. However, enhanced rectification ratio and higher forward current density is observed in case of PEDOT-FWCNT based Schottky diode. Furthermore, reliability test depicts smaller hysteresis effect and better performance of PEDOT-FWCNT based diodes.
AB - Transparent, conductive films of poly (3,4-ethylenedioxythiophene) (PEDOT) and poly (3,4-ethylenedioxythiophene)-few walled carbon nanotube (PEDOT-FWCNT) nanocomposite were synthesized by in-situ oxidative polymerization and investigated for their Schottky diode property. The prepared films were characterized by UV-Vis spectroscopy, thermal gravimetric analysis (TGA), surface resistivity, cyclic voltametery, scanning electron microscopy (SEM) and high resolution transmission electron microscopy (HRTEM). SEM reveals the formation of homogeneous and adhesive polymer films while HRTEM confirms the uniform wrapping of polymer chains around the nanotube walls for PEDOT-FWCNT film. Improved thermal stability, conductivity and charge storage property of PEDOT in the presence of FWCNT is observed. Among different compositions, 5 wt. % of FWCNT is found to be optimum with sheet resistance and transmittance of 500 Ω sq-1 and 77%, respectively. Moreover, the electronic and junction properties of polymer films were studied and compared by fabricating sandwich type devices with a configuration of Al/PEDOT or PEDOT-FWCNT nanocomposite/indium tin oxide (ITO) coated glass. The measured current density-voltage characteristics show typical rectifying behavior for both configurations. However, enhanced rectification ratio and higher forward current density is observed in case of PEDOT-FWCNT based Schottky diode. Furthermore, reliability test depicts smaller hysteresis effect and better performance of PEDOT-FWCNT based diodes.
KW - Composite materials
KW - Electrical properties
KW - Polymer
KW - Thin films
UR - http://www.scopus.com/inward/record.url?scp=84905690706&partnerID=8YFLogxK
U2 - 10.1016/j.matchemphys.2014.06.032
DO - 10.1016/j.matchemphys.2014.06.032
M3 - Article
AN - SCOPUS:84905690706
SN - 0254-0584
VL - 147
SP - 867
EP - 877
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
IS - 3
ER -
