Influence of relative humidity on the electrical response of PEDOT:PSS based organic field-effect transistor
| Author | Zafar Q. |
| Author | Abdullah S.M. |
| Author | Azmer M.I. |
| Author | Najeeb M.A. |
| Author | Qadir K.W. |
| Author | Sulaiman K. |
| Available date | 2020-02-05T08:53:35Z |
| Publication Date | 2018 |
| Publication Name | Sensors and Actuators, B: Chemical |
| Resource | Scopus |
| ISSN | 9254005 |
| Abstract | We have investigated the influence of relative humidity on the electrical response of a bottom gate organic field-effect transistor (OFET) with poly(3,4-ethylenedioxythiophene)/poly(4-styrene sulfonate) (PEDOT:PSS) as an active channel material. For sensor fabrication, the organic polymer PEDOT:PSS has been spun-cast on highly doped n-Si wafer with preliminary thermally deposited gold, source and drain electrodes. The structural characterization and surface morphology study of active layer has been performed by XRD and FESEM, respectively. From the transfer characteristic curve, the p-type hole conductivity in PEDOT:PSS thin film is confirmed. Whereas from the output current-voltage (I�V) characteristic of the OFET, the Ion/Ioff ratio has been measured to be ?2.6, when operated at relative humidity (RH) ?60%. The humidity sensing characteristics of the OFET have further been investigated by exposing the proposed OFET to varied RH levels (40�80% RH) at room temperature (26.2 �C). Within the humidity range examined, the channel current has been observed to amplify by nearly 29.4 times of its magnitude. 2017 Elsevier B.V. |
| Sponsor | Authors are thankful to the Ministry of Education for the financial support under High Impact Research (HIR) grant UM.S/625/3/HIR/MOE/26 with account number UM.0000080/HIR.C3 and University Malaya Research Grant (UMRG) under grant number RP007A-13AFR . Q. Zafar is thankful to Erasmus Mundus (EM) INTACT program for Post-Doc mobility. Dr. Qayyum Zafar was born in 1986 at Lahore-city, Pakistan. He graduated in Physics from Government College University (GCU), Lahore in 2008. He received his MS degree from Ghulam Ishaq Khan Institute of Engineering Sciences and Technology (GIKI), Swabi in 2011. He served as Research Associate at Nano sensors.catalysis lab at COMSATS Institute, Islamabad for one year. He obtained his PhD in Applied Physics (Organic Electronics) from Department of Physics, University of Malaya, Malaysia. He later joined Solar/Photovoltaic Materials Research Group as a Postdoctoral Research Fellow in 2015. Currently he is serving as ERASMUS MUNDUS (INTACT) postdoctoral Research Fellow at Department of Electrical Engineering, Frederick University, Cyprus. Dr. Shahino Mah Abdullah was born in Johor, Malaysia in 1987. He completed his B.Sc. and Ph.D. degrees in Physics from the University of Malaya, Malaysia. He joined Low Dimensional Materials Research Centre (LDMRC) at Department of Physics, University of Malaya as a postdoctoral research fellow in 2016. His research interests encompass fabrication of electrochemical and organic semiconducting devices including solar cells, light-emitting diodes, and field-effect transistors. Currently, he is a Research Fellow at International Institute of Advanced Islamic Studies (IAIS) Malaysia, with interest in Science, Technology, Environment and Ethics. Mohamad Izzat Azmer was born at Ipoh, Perak in 1989. He completed his BSc. (Hons.) in Materials Technology in 2013 at Universiti Teknologi Mara (UiTM), Shah Alam, Selangor, Malaysia. He has recently completed his MS applied Physics from Solar/Photovoltaic Materials Research Group, Department of Physics, University of Malaya, Malaysia. Dr. Mansoor Ani Najeeb received his Bachelors in Physiotherapy from Calicut University (India) and M.Tech in Biomedical Engineering from VIT University (India). He completed his Ph.D in Biomedical Engineering & Nanotechnology from Noorul Islam University (India). Prior to his Ph.D, he was working as an Assistant Professor at the Department of Biomedical Engineering, Noorul Islam University. He joined Solar/Photovoltaic Materials Research Group as a Postdoctoral Research Fellow in 2014. Currently, he is working as PostDoc Research Fellow at Center for Advanced Materials, Qatar University, Qatar . His current research interests are Organic Semiconductor based biosensors, Thin Films and Nano Biomaterials. Dr. Karwan Wasman Qadir was born in Dbis-Kerkuk, Kurdistan, Iraq in 1982. He did his B.Sc in Physics in 2005 and M.Sc in Solar Radiation Physics in 2010 from Salahaddin University, Erbil, Iraq. His M.Sc research title was Study and Analysis of Global Solar Radiation in Kurdistan Region-Iraq. He earned his PhD in Applied Physics from Universiti Malaya. Currently, he is working as lecturer and researcher at Salahaddin University, Erbil, Iraq. Dr. Khaulah Sulaiman is an Associate Professor at Department of Physics, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia. Her current research interests are organic semiconductor device physics, solution process-able organic semiconductor thin films, organic/metal interface and organic solar cells. |
| Language | en |
| Publisher | Elsevier B.V. |
| Subject | Conductive polymer PEDOT:PSS Humidity adsorption-desorption kinetics Humidity sensor Organic field effect transistor Physisorption and chemisorption |
| Type | Article |
| Pagination | 2652-2656 |
| Volume Number | 255 |
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