A Thermoelectric Polymer Field-Effect Transistor via Iodine-Doped P3HT

Doping can alter certain electronics, including the thermoelectric properties of an organic semiconductor. These alterations may enable viable tunable devices that could be useful in temperature sensing for autonomous controls. Here, we demonstrate a dual-modulation organic field-effect transistor (...

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Main Authors: Joseph Wayne Norman, Sam-Shajing Sun
Format: Article
Language:English
Published: MDPI AG 2024-01-01
Series:Micromachines
Subjects:
Online Access:https://www.mdpi.com/2072-666X/15/2/172
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author Joseph Wayne Norman
Sam-Shajing Sun
author_facet Joseph Wayne Norman
Sam-Shajing Sun
author_sort Joseph Wayne Norman
collection DOAJ
description Doping can alter certain electronics, including the thermoelectric properties of an organic semiconductor. These alterations may enable viable tunable devices that could be useful in temperature sensing for autonomous controls. Here, we demonstrate a dual-modulation organic field-effect transistor (OFET) where temperature can modulate the current-voltage characteristics of the OFET and gate voltage can modulate the thermoelectric properties of the active layer in the same device. Specifically, Poly(3-hexylthiophene-2,5-diyl) (P3HT) was utilized as the host p-type semiconducting polymer, and iodine was utilized as the thermoelectric minority dopant. The finished devices were characterized with a semiconductor analyzer system with temperature controlled using two thermoelectric cooling plates. The FETs with iodine doping levels in the range of 0.25% to 0.5% mole ratio with respect to the P3HT exhibit the greatest on/off ratios. This study also observed that P3HT thin film samples with an intermediate iodine doping concentration of 0.25% mole ratio exhibit an optimal thermoelectric power factor (PF).
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spelling doaj.art-e95288348ba541e9b71e6496305e0cc82024-02-23T15:27:30ZengMDPI AGMicromachines2072-666X2024-01-0115217210.3390/mi15020172A Thermoelectric Polymer Field-Effect Transistor via Iodine-Doped P3HTJoseph Wayne Norman0Sam-Shajing Sun1Center for Materials Research, Norfolk State University, 700 Park Ave., Norfolk, VA 23504, USACenter for Materials Research, Norfolk State University, 700 Park Ave., Norfolk, VA 23504, USADoping can alter certain electronics, including the thermoelectric properties of an organic semiconductor. These alterations may enable viable tunable devices that could be useful in temperature sensing for autonomous controls. Here, we demonstrate a dual-modulation organic field-effect transistor (OFET) where temperature can modulate the current-voltage characteristics of the OFET and gate voltage can modulate the thermoelectric properties of the active layer in the same device. Specifically, Poly(3-hexylthiophene-2,5-diyl) (P3HT) was utilized as the host p-type semiconducting polymer, and iodine was utilized as the thermoelectric minority dopant. The finished devices were characterized with a semiconductor analyzer system with temperature controlled using two thermoelectric cooling plates. The FETs with iodine doping levels in the range of 0.25% to 0.5% mole ratio with respect to the P3HT exhibit the greatest on/off ratios. This study also observed that P3HT thin film samples with an intermediate iodine doping concentration of 0.25% mole ratio exhibit an optimal thermoelectric power factor (PF).https://www.mdpi.com/2072-666X/15/2/172field-effect transistors FETthermoelectricpower factor PFpolymersdopingP3HT
spellingShingle Joseph Wayne Norman
Sam-Shajing Sun
A Thermoelectric Polymer Field-Effect Transistor via Iodine-Doped P3HT
Micromachines
field-effect transistors FET
thermoelectric
power factor PF
polymers
doping
P3HT
title A Thermoelectric Polymer Field-Effect Transistor via Iodine-Doped P3HT
title_full A Thermoelectric Polymer Field-Effect Transistor via Iodine-Doped P3HT
title_fullStr A Thermoelectric Polymer Field-Effect Transistor via Iodine-Doped P3HT
title_full_unstemmed A Thermoelectric Polymer Field-Effect Transistor via Iodine-Doped P3HT
title_short A Thermoelectric Polymer Field-Effect Transistor via Iodine-Doped P3HT
title_sort thermoelectric polymer field effect transistor via iodine doped p3ht
topic field-effect transistors FET
thermoelectric
power factor PF
polymers
doping
P3HT
url https://www.mdpi.com/2072-666X/15/2/172
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AT samshajingsun athermoelectricpolymerfieldeffecttransistorviaiodinedopedp3ht
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AT samshajingsun thermoelectricpolymerfieldeffecttransistorviaiodinedopedp3ht