Influence of Semiconductor Thickness and Molecular Weight on the Charge Transport of a Naphthalenediimide-Based Copolymer in Thin-Film Transistors / Karpov Yevhen,Zhao Wei,Raguzin Ivan,Beryozkina Tetyana,Bakulev Vasiliy,Al-Hussein Mahmoud,Haeussler Liane,Stamm Manfred,Voit Brigitte,Facchetti Antonio,Tkachov Roman,Kiriy Anton // ACS APPLIED MATERIALS \& INTERFACES. - 2015. - V. 7, l. 23. - P. 12478-12487.

ISSN/EISSN:

1944-8244 / нет данных

Type:

Article

Abstract:

The N-type semiconducting polymer, P(NDI2OD-T2), with different molecular weights (MW = 23, 72, and 250 kg/mol) was used for the fabrication of field-effect transistors (FETs) with different Semiconductor layer thicknesses. FETs with semiconductor layer thicknesses from similar to 15 to 50 nm exhibit similar electron mobilities (mu's) of 0.2-0.45 cm(2) V-1 s(-1). Reduction of the active film thickness led to decreased mu values; however, FETs with similar to 2 and similar to 5 nm thick P(NDI2OD-T2) films still exhibit substantial mu's of 0.01-0.02 and similar to 10(-4) cm(2) V-1 s(-1), respectively. Interestingly, the lowest molecular weight sample (P-23, MW approximate to 23 kg/mol, polydispersity index (PDI) = 1.9) exhibited higher mu than the highest molecular weight sample (P-250, MW approximate to 250 kg/mol, PDI = 2.3) measured for thicker devices (15-50 nm). This is rather unusual behavior because typically charge carrier mobility increases with MW where improved grain-to-grain connectivity usually enhances transport events. We attribute this result to the high crystallinity of the lowest MW sample, as confirmed by differential scanning Calorimetry and X-ray diffraction studies, which may (over) compensate for other effects.

Author keywords:

semiconducting polymer; thin-film transistor; electron mobility; morphology; crystallinity FIELD-EFFECT TRANSISTORS; CHAIN-GROWTH POLYMERIZATION; HETEROJUNCTION SOLAR-CELLS; ONE-POT SYNTHESIS; HIGH-MOBILITY; CONJUGATED POLYMER; ORGANIC TRANSISTORS; PRINTED TRANSISTORS; ELECTRON-TRANSPORT; PERFORMANCE

DOI:

10.1021/am507759u

Web of Science ID:

ISI:000356753500022

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	JUN 17
Publisher	AMER CHEMICAL SOC
Address	1155 16TH ST, NW, WASHINGTON, DC 20036 USA
Language	English
Keywords-Plus	FIELD-EFFECT TRANSISTORS; CHAIN-GROWTH POLYMERIZATION; HETEROJUNCTION SOLAR-CELLS; ONE-POT SYNTHESIS; HIGH-MOBILITY; CONJUGATED POLYMER; ORGANIC TRANSISTORS; PRINTED TRANSISTORS; ELECTRON-TRANSPORT; PERFORMANCE
Research-Areas	Science \& Technology - Other Topics; Materials Science
Web-of-Science-Categories	Nanoscience \& Nanotechnology; Materials Science, Multidisciplinary
Author-Email	afacchetti@polyera.com tkachov@ipfdd.de kiriy@ipfdd.de
ResearcherID-Numbers	Umlauf, Ursula/D-3356-2014 Voit, Brigitte/D-4755-2009
ORCID-Numbers	Voit, Brigitte/0000-0002-4531-691X
Funding-Acknowledgement	German Excellence Initiative via Cluster of Excellence {[}EXC 1056]; International Helmholtz Research School (IHRS) NanoNet; University of Jordan; Leibniz-Institut fur Polymerforschung (IPF), Dresden; Ministry of Education {[}4.1626.2014/K]; KAU {[}4-130-36-HiCi]
Funding-Text	This paper is in honor of the 65th birthday of Prof. Manfred Stamm. We gratefully acknowledge support from the German Excellence Initiative via the Cluster of Excellence EXC 1056 ``Center for Advancing Electronics Dresden{''} (CFAED) and International Helmholtz Research School (IHRS) NanoNet. M.A.H. thanks The University of Jordan and Leibniz-Institut fur Polymerforschung (IPF), Dresden, for financial support. T.B. and V.B. thank the Ministry of Education, State Task Project No 4.1626.2014/K for financial support. A.F. thanks KAU for support (grant \# 4-130-36-HiCi).
Number-of-Cited-References	73
Usage-Count-Last-180-days	5
Usage-Count-Since-2013	60
Journal-ISO	ACS Appl. Mater. Interfaces
Doc-Delivery-Number	CL2DJ