Coherent Electron Transport in Air-Stable, Printed Single-Crystal Organic Semiconductor and Application to Megahertz Transistors
- 1 December 2020
- journal article
- research article
- Published by Wiley in Advanced Materials
- Vol. 32 (50), e2003245
- https://doi.org/10.1002/adma.202003245
Abstract
Organic semiconductors (OSCs) have attracted growing attention for optoelectronic applications such as field-effect transistors (FETs), and coherent (or band-like) carrier transport properties in OSC single crystals (SCs) have been of interest as they can lead to high carrier mobilities. Recently, such p-type OSC SCs compatible with a printing technology have been used to achieve high-speed FETs; therefore, developments of n-type counterparts may be promising for realizing high-speed complementary organic circuits. Herein, coherent electron transport properties in a printed SC of a state-of-the-art, air-stable n-type OSC, PhC2-BQQDI, by means of variable-temperature gated Hall effect measurements and X-ray single-crystal diffraction analyses in conjunction with band structure calculations, are reported. Furthermore, the SC FET is tested for high-speed operations, which obtains a cutoff frequency of 4.3 MHz at an operation voltage of 20 V in air. Thus, PhC2-BQQDI is shown as a new candidate for practical applications of SC-based, organic complementary devices.Keywords
Funding Information
- Japan Science and Technology Agency
- Precursory Research for Embryonic Science and Technology
- Japan Society for the Promotion of Science (17H03104, 17H06123, 17H06200, 18H01856)
This publication has 47 references indexed in Scilit:
- High-speed organic single-crystal transistors gated with short-channel air gaps: Efficient hole and electron injection in organic semiconductor crystalsOrganic Electronics, 2013
- On the Origin of Contact Resistances of Organic Thin Film TransistorsAdvanced Materials, 2012
- Patternable Solution‐Crystallized Organic Transistors with High Charge Carrier MobilityAdvanced Materials, 2011
- Dynamic disorder in molecular semiconductors: Charge transport in two dimensionsThe Journal of Chemical Physics, 2011
- High Current-Gain Cutoff Frequencies above 10 MHz in n-Channel C60 and p-Channel Pentacene Thin-Film TransistorsJapanese Journal of Applied Physics, 2011
- In-Crystal and Surface Charge Transport of Electric-Field-Induced Carriers in Organic Single-Crystal SemiconductorsPhysical Review Letters, 2007
- Charge Transport in Organic SemiconductorsChemical Reviews, 2007
- Charge-Transport Regime of Crystalline Organic Semiconductors: Diffusion Limited by Thermal Off-Diagonal Electronic DisorderPhysical Review Letters, 2006
- Hall Effect in the Accumulation Layers on the Surface of Organic SemiconductorsPhysical Review Letters, 2005
- Hall Effect of Quasi-Hole Gas in Organic Single-Crystal TransistorsJapanese Journal of Applied Physics, 2005