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Journal ArticleDOI

High-Performance Air-Stable Ambipolar Organic Thin-Film Transistor Based on F16CuPc and CuPc

22 Apr 2005-Japanese Journal of Applied Physics (IOP Publishing)-Vol. 44, Iss: 19
TL;DR: In this paper, the authors report on the fabrication of organic thin-film transistors based on fluorinated copper phthalocyanine (F16CuPc) and copper Phthalocynine (CuPC) layers, which showed high performance air-stable ambipolar characteristics with a field-effect hole mobility of 326 ×10-3 cm2/Vs and a field effect electron mobility of 334 ×10 3 cm 2/Vs.
Abstract: We report on the fabrication of organic thin-film transistors based on fluorinated copper phthalocyanine (F16CuPc) and copper phthalocyanine (CuPc) layers The thin-film transistors showed high-performance air-stable ambipolar characteristics with a field-effect hole mobility of 326 ×10-3 cm2/Vs and a field-effect electron mobility of 334 ×10-3 cm2/Vs, which are comparable to the unipolar field-effect mobilities of single-layer thin-film transistors These outstanding ambipolar characteristics, along with the highly stable chemical nature of F16CuPc and CuPc, make this transistor an attractive candidate for organic complementary metal oxide semiconductor (CMOS) circuits
Citations
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Journal ArticleDOI
TL;DR: Construction of heterostructures with p -type and n -type semiconductors constitutes an effi cient way to realize ambipolar operation.
Abstract: and two-component transistors with the combination of p -type and n -type semiconductors. [ 4–6 ] Ambipolar transport materials are particularly desirable concerning the construction of complementary-like circuits, as the fabrication processes could be signifi cantly simplifi ed when two unipolar materials were replaced with an ambipolar material. Despite the huge progresses in organic semiconductors, the ambipolar transport materials are still rare with respect to unipolar materials, and it is still a great challenge in design and synthesis of π -conjugated systems that could fulfi ll the requirement for achieving both stable p -type and n -type transport in ambient condition. As an alternative choice, construction of heterostructures with p -type and n -type semiconductors constitutes an effi cient way to realize ambipolar operation. For example, bilayer heterojunction, [ 4 ] bulk heterojunction [ 5 ] and lateral heterostructure [ 6 ] have been successfully demonstrated to fabricate

192 citations

Journal ArticleDOI
TL;DR: In this article, three fluorinated BsubPcs have been synthesized and characterized using cyclic voltammetry and cyclic volatmmetry (CV) to probe the frontier orbital energy levels in both dichloromethane and acetonitrile solution.
Abstract: Three fluorinated BsubPcs have been synthesized and characterized. Crystals suitable for XRD were grown by slow vapor diffusion and sublimation. Analysis of their crystal structures revealed a dimeric association of BsubPc units for F5BsubPc and columnar packing for F12BsubPc and F17BsubPc. Cyclic volatmmetry (CV) was used to probe the frontier orbital energy levels of these compounds in both dichloromethane and acetonitrile solution; however, only F5BsubPc underwent oxidative events, whereas all three compounds underwent reductive events. A −362 and −37 mV shift in the reductive peak potential was observed for peripheral and axial fluorination, respectively, as measured by cyclic voltammetry. Solution UV−vis absorption and photoluminescence spectra were measured in dichloromethane. All three compounds demonstrated air-stable n-type conductivity in single-carrier devices and extremely narrow orange EL emission with a fwhm of only ∼30 nm. F5BsubPc showed a maximum luminescence of 122 cd/m2 at 8 V, with a m...

111 citations

Book ChapterDOI
01 Jan 2010
TL;DR: In this article, the semiconducting properties of monomeric phthalocyanines as well as porphyrins, bis(phthalocyaninato) rare earth double-deckers, and tris(phthalocalinato)-triple-decker are summarized.
Abstract: Various functional phthalocyanines as well as their tetrapyrrole analogs, porphyrins, have been extensively studied as organic semiconductors since the first report of organic field effect transistors (OFETs) in 1986. The large conjugated π system, excellent photoelectric characteristics, intriguing and unique optical properties, high thermal and chemical stability, and most importantly the easy functionalization of phthalocyanines render them ideal organic semiconductor materials as active layers for OFETs. In this chapter, the semiconducting properties of monomeric phthalocyanines as well as monomeric porphyrins, bis(phthalocyaninato) rare earth double-deckers, and tris(phthalocyaninato) rare earth triple-deckers in terms of their semiconducting nature (p-type, n-type, or ambipolar), carrier mobility, and current modulation reported in the past two decades have been summarized. Theoretical studies toward understanding the relationship between molecular structures as well as molecular electronic structures of phthalocyanines and their semiconducting properties have also been included.

72 citations

References
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Journal ArticleDOI
03 Feb 2000-Nature
TL;DR: It is shown that such an approach can realize much larger scales of integration (in the present case, up to 864 transistors per circuit) and operation speeds of ∼1 kHz in clocked sequential complementary circuits.
Abstract: Thin-film transistors based on molecular and polymeric organic materials have been proposed for a number of applications, such as displays and radio-frequency identification tags. The main factors motivating investigations of organic transistors are their lower cost and simpler packaging, relative to conventional inorganic electronics, and their compatibility with flexible substrates. In most digital circuitry, minimal power dissipation and stability of performance against transistor parameter variations are crucial. In silicon-based microelectronics, these are achieved through the use of complementary logic-which incorporates both p- and n-type transistors-and it is therefore reasonable to suppose that adoption of such an approach with organic semiconductors will similarly result in reduced power dissipation, improved noise margins and greater operational stability. Complementary inverters and ring oscillators have already been reported. Here we show that such an approach can realize much larger scales of integration (in the present case, up to 864 transistors per circuit) and operation speeds of approximately 1 kHz in clocked sequential complementary circuits.

1,291 citations