High performance, acene-based organic thin film transistors

Abstract

1,4,8,11-Methyl-substituted 6,13-triethylsilylethynylpentacene shows extended pi-pi overlap when deposited from solution, yielding organic thin film transistors with high and reproducible hole mobility with negligible hysteresis.

Organic Semiconductor/Insulator Polymer Blends for High-Performance Organic Transistors

“…This, in turn, enhanced the electrical properties of the OFETs because the phase-separated interface served as a pathway for charge transport (Figure 2b), and the smooth interface is beneficial for facilitating efficient charge transport. Soluble acenes are advantageous organic semiconductors because materials with solution processability and high π-orbital overlaps have been reported [31][32][33]. Where this type of organic semiconductor is used, processing conditions should be optimized to obtain desirable thin film morphologies and microstructures, thereby maximizing the electrical properties of OFETs.…”

Solution-processed small molecule transistors with low operating voltages and high grain-boundary anisotropy

“…This performance is a notable improvement over TIPS-pentacene previously produced by drop-casting, spin-coating, and ink-jet printing, 32 and other solutionprocessed acene-based single component devices, [33][34][35] confirming that improved molecular engineering results in a controlled micro-and macro-structure of BTE-TIPS-PEN thin films that positively influences the electronic properties. This high level of reproducibility is required for the technological exploitation of such discrete devices in large-area organic electronics.…”

Organic Semiconductors for Field-Effect Transistors

“…Its drop-casting films showed high mobility of up to 1.8 cm 2 V −1 s −1 with an on/off current ratio over 10 7 , and self-assembled ribbons exhibited high mobilities of 1.42 cm 2 V −1 s −1 [83]. The tetramethyl-substituted acene derivative, 27-based thin film transistors fabricated by a solution-processed technique also showed mobility as high as 2.5 cm 2 V −1 s −1 [84]. The results showed that the introduction of trialkylsilylethynyl groups on the peri-position of acene could afford nearly planar molecule structures, improved solubility and stability while maintaining strengthened π-π stacking as anticipated.…”

“…Moreover, with 6,13-pentacenequinone films as gate insulators BGTC; Au;SiO 2 /Si; OTS [84] (continued) (continued) BGTC; Au; SiO 2 /Si; PMMA [134] (continued) (continued) (continued) [198] (continued) [63]. However, because of the narrow energy gap and high-lying HOMO energy level, pentacene exhibited high sensitivity to light and high oxidation sensitivity to oxygen [64].…”