ZHANG Hua-ye, ZHANG Fan, ZHANG Meng etc. Influence of PVA Insulator Modified with Cross-linked PMMA on The Performance of P3HT OFETs[J]. Chinese Journal of Luminescence, 2018,39(11): 1542-1548
ZHANG Hua-ye, ZHANG Fan, ZHANG Meng etc. Influence of PVA Insulator Modified with Cross-linked PMMA on The Performance of P3HT OFETs[J]. Chinese Journal of Luminescence, 2018,39(11): 1542-1548 DOI: 10.3788/fgxb20183911.1542.
Influence of PVA Insulator Modified with Cross-linked PMMA on The Performance of P3HT OFETs
The surface and electrical characteristics of the bare poly(vinyl alcohol)(PVA) and PVA modified with cross-linked poly(methyl methacrylate)(C-PMMA) by 1
6-bis(trichlorosilyl)hexane(C
6
-Si)(C-PMMA/PVA) were studied. The surface roughness increases from 0.386 nm to 0.532 nm
and the capacitance drops to 11.5 nF/cm
2
from 14.2 nF/cm
2
by the cross linking
however
the contact angle of water is greatly raised from 36 to 68
indicating that the surface polarity of PVA is remarkably decreased by the modification of C-PMMA. Additionally
the leakage current of the C-PMMA-modified PVA layer is reduced by about 2 orders of magnitude. The C-PMMA/PVA as well as bare PVA insulating layers are utilized to fabricate organic field-effect transistors(OFETs) based on 3-hexyl thiophene (P3HT) with a bottom gate/top contact configuration. The performance of the device with the C-PMMA/PVA insulating layer is significantly improved
with the on/off ratio increased by 20 times and the mobility increased by 4 times
reaching~10
2
cm
2
V
-1
s
-1
and 3.310
-2
cm
2
V
-1
s
-1
respectively. Furthermore
the hysteresis of the P3HT OFET
which mainly originates from the high surface polarity of the PVA insulating layer
is reduced dramatically by the modification of a very thin C-PMMA film.
关键词
Keywords
references
WHITING G L, SCHWARTZ D E, NG T N, et al.. Digitally fabricated multi-modal wireless sensing using a combination of printed sensors and transistors with silicon components[J]. Flex. Print. Electron., 2017, 2(3):034002.
ZHANG K, ZHANG J, ZHANG X, et al.. Synthesis and characterization of novel push-pull oligomer based on naphthodithiophene-benzothiodiazole for OFETs application[J]. Tetrahedron Lett., 2018, 59(7):641-644.
XIANG L, YING J, HAN J, et al.. High reliable and stable organic field-effect transistor nonvolatile memory with a poly(4-vinyl phenol) charge trapping layer based on a pn-heterojunction active layer[J]. Appl. Phys. Lett., 2016, 108(17):173301.
JIANG Y, GUO Y, LIU Y. Engineering of amorphous polymeric insulators for organic field-effect transistors[J]. Adv. Electron. Mater., 2017, 3(11):1700157.
RUZGAR S, CAGLAR M. Use of bilayer gate insulator to increase the electrical performance of pentacene based transistor[J]. Synth. Met., 2017, 232:46-51.
SUN X, DI C A, LIU Y. Engineering of the dielectric-semiconductor interface in organic field-effect transistors[J]. J. Mater. Chem., 2010, 20(13):2599.
YE X, LIN H, YU X, et al.. High performance low-voltage organic field-effect transistors enabled by solution processed alumina and polymer bilayer dielectrics[J]. Synth. Met., 2015, 209:337-342.
LEE S H, KIM D Y, NOH Y Y. Solution-processed polymer-sorted semiconducting carbon nanotube network transistors with low-k/high-k bilayer polymer dielectrics[J]. Appl. Phys. Lett., 2017, 111(12):123103.
NOH Y Y, ZHAO N, CAIRONI M, et al.. Downscaling of self-aligned, all-printed polymer thin-film transistors[J]. Nat. Nanotechnol., 2007, 2(12):784-789.
JUNG S, ALBARIQI M, GRUNTZ G, et al.. A TIPS-TPDO-tetra CN-based n-type organic field-effect transistor with a cross-linked PMMA polymer gate dielectric[J]. ACS Appl. Mater. Interf., 2016, 8(23):14701-14708.
PARK Y J, CHA M J, YOON Y J, et al.. Improved performance in n-type organic field-effect transistors via polyelectrolyte-mediated interfacial doping[J]. Adv. Electron. Mater., 2017, 3(10):1700184.
PARK S, KIM C H, LEE W J, et al.. Sol-gel metal oxide dielectrics for all-solution-processed electronics[J]. Mater. Sci. Eng. R:Reports, 2017, 114:1-22.
QIU C, ZHANG Z, ZHONG D, et al.. Carbon nanotube feedback-gate field-effect transistor:suppressing current leakage and increasing on/off ratio[J]. ACS Nano, 2015, 9(1):969-977.
DIEMER PJ, HAYES J, WELCHMAN E, et al.. The influence of isomer purity on trap states and performance of organic thin-film transistors[J]. Adv. Funct. Mater., 2017, 3(1):168-173.
WANG H, WU Y, CONG C, et al.. Hysteresis of electronic transport in graphene transistors[J]. ACS Nano, 2010, 4(12):7221.
KALB W L, BATLOGG B. Calculating the trap density of states in organic field-effect transistors from experiment:a comparison of different methods[J]. Phys. Rev. B:Condens. Matter, 2009, 81(3):1718-1720.
SEO J H, KWON J H, SHIN S I, et al.. Organic thin film transistors with polyvinyl alcohol treated dielectric surface[J]. Semicond. Sci. Technol., 2007, 22(9):1039-1043.
JIN S H, ISLAM A E, KIM T I, et al.. Sources of hysteresis in carbon nanotube field-effect transistors and their elimination via methylsiloxane encapsulants and optimized growth procedures[J]. Adv. Funct. Mater.,2012, 22(11):2276-2284.
PADMA N. Hydrophobic dielectric surface influenced active layer thickness effect on hysteresis and mobility degradation in organic field effect transistors[J]. Superlatt. Microstruct., 2016, 90:198-206.
JANG G, YIM W, AHN Y H, et al.. Control of device characteristics by passivation of graphene field effect transistors with polymers[J]. Cur. Appl. Phys., 2016, 16(11):1506-1510.
NOH Y H, YOUNG P S, SEO S M, et al.. Root cause of hysteresis in organic thin film transistor with polymer dielectric[J]. Org. Electron., 2006, 7(5):271-275.