Abstract
The electrical conductivity and carrier relaxation in poly (3, 4-ethylenedioxythiophene) (PEDOT) nanofibers have been studied over a wide range of frequency and temperature by means of impedance spectroscopy. High resolution transmission electron micrographs confirm the formation of nanofibers with average diameter of 14 nm. The linear increase of imaginary permittivity with decreasing frequency in the log-log plot of ε″ versus ω is attributed to the higher contribution of dc conductivity than that of the electrode polarization. The presence of single semicircle in the complex impedance Cole-Cole plot indicates the presence of single charge carrier relaxation mechanism. The perfect matching of the relaxation peak in Z″ and M″ vs. frequency at different temperature confirms the presence of Debye type relaxation. From the temperature dependent behavior of frequency exponent study it is confirmed that the charge transport takes place through correlated barrier hopping mechanism. Decrease of barrier height and increase of density of states with increasing dopant concentration can be corroborated with the conductivity enhancement.
Similar content being viewed by others
References
Pomerantz Z, Belmonte GG, Joseph A, Lellouche JP, Bisquert J, Zaban A (2007) Electrochim Acta 52:6841–6847
Ates M (2011) Prog Org Coatings 71:1–10
Nath C, Kumar A (2013) Phys B 426:94–102
Xiao Y, Cui X, Martin DC (2004) J Electro Chem 573:43–48
Liu YD, Kim JE, Choi HJ (2011) Macromol Rapid Commun 32:881–886
Granstrom M, Berggren M, Inganas O (1995) Science 267:1479–1481
Gustafsson JC, Liedberg B, Inganas O (1994) Solid State Ionics 69:145–152
Richert R, Wagner H (1998) Solid State Ionics 105:167–173
Kulkarni S, Nagabhushana BM, Parvatikar N, Koppalkar A, Shivakumara C, Damle R (2014) Mater Res Bull 50:197–202
Intatha U, Eitssayeam S, Wang J, Tunkasiri T (2010) Curr Appl Phys 10:21–25
Biswas S, Dutta B, Bhattacharya S (2014) J Mater Sci 49:5910–5921
Han MG, Foulger SH (2006) Small 10:1164–1169
Aasmundh KE, Samuelsent EJ, Pettersson LAA, Inganas O, Johansson T, Feidenhans R (1999) Synth Met 101:561–564
Gupta B, Mehta M, Melvin A, Kamalakannan R, Dash S, Kamruddin M, Tyagi AK (2014) Mater Chem Phys 147:867–877
Shin HJ, Jeon SS, Im SS (2011) Synth Met 161:1284–1288
Xiong S, Zhang L, Lu X (2013) Polym Bull 70:237–247
Tamburri E, Sarti S, Orlanducci S, Terranova ML, Rossi M (2011) Mater Chem Phys 125:397–404
Van FT, Garreau S, Louarn G, Froyer G, Chevrot C (2001) J Mater Chem 11:1378–1382
Helms JH, Majumdar A (1993) J Electrochem Soc 140:1048–1055
Govindaraj G, Baskaran N, Shahi K, Monoravi P (1995) Solid State Ionics 76:47–55
Zhao C, Zhao CZ, Werner M, Taylor S, Chalker P (2013) Nano Res Lett 8:456–467
Mashimo S, Nozaki R, Yagihara S, Takeishi S (1982) J Chem Phys 77:6259–6262
Smyth CP (1955) Dielectric behavior and structure. McGraw-Hill Book Company Inc, New York
Ku CC, Liepins D (1987) Electrical properties of polymers. Hanser Publishers, Munich
Jonscher AK (1983) Dielectric relaxation in solids. Chelsea Dielectric, London
Rehbach MS, Sluyters JH (1964) Rec Trav Chim Pays Bas 83:217–222
Mahato DK, Dutta A, Sinha TP (2011) Phys B 406:2703–2708
Roy AS, Hegde SG, Parveen A (2014) Polym Adv Technol 25:130–135
Afzal AB, Akhtar MJ, Nadeem M, Hassan MM (2009) J Phys Chem C 113:17560–17565
Molak A, Paluch M, Pawlus S, Klimontko J, Ujma Z, Gruszka I (2005) J Phys D Appl Phys 38:1450–1460
Almond D, West A, Grant R (1982) Solid State Commun 55:1277–1280
Chakraborty G, Meikap AK, Babu R, Blau WJ (2011) Solid State Commun 151:754–758
Lu H, Zhang X, Zhang H (2006) J Appl Phys 100:054104–054111
Mohanty S, Choudharyn RNP, Padhee R, Parida BN (2014) Ceram Int 40:9017–9025
Davis M (1979) Electronic processes in non-crystalline solids. Clarendon, Oxford
Jonscher AK (1977) Nature 267:673–679
Dar MA, Batoo KM, Verma V, Siddiqui WA, Kotnala RK (2010) J Alloys Compd 493:553–560
Dey A, De S, De A, De SK (2004) Nanotech 15:1277–1283
Gmati F, Fattoum A, Bohli N, Mohamed AB (2008) J Phys Condens Matter 20:125221–125230
Farid AM, Bekheet AE (2000) Vacuum 59:932–939
Austin IG, Mott NF (1969) Adv Phys 18:41–102
Ruit KVD, Cohen RI, Bollen D, Mol TV, Rozen RY, Janssen RAJ, Kemerink M (2013) Adv Funct Mater 23:5778–5786
Acknowledgments
Authors acknowledge the financial support provided by UGC-DAE-CSR Indore Centre, India through project grant No. CSR-I/CRS-50/50. Authors sincerely thank Dr. K. Asokan Scientist IUAC for providing the facilities to carry out the dielectric measurements and for his scientific discussion during the experiment.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Chutia, P., Kumar, A. Charge carrier relaxation studies in poly (3, 4-ethylenedioxythiophene) nanofibers. J Polym Res 22, 122 (2015). https://doi.org/10.1007/s10965-015-0768-5
Received:
Accepted:
Published:
DOI: https://doi.org/10.1007/s10965-015-0768-5