Synthesis of [7]phenacene incorporating tetradecyl chains in the axis positions and its application in field-effect transistors

Abstract

Ditetradecyl-substituted [7]phenacene was prepared and applied in thin-film FET devices, displaying higher mobility compared to parent [7]phenacene.

Evaluation of Effective Field-Effect Mobility in Thin-Film and Single-Crystal Transistors for Revisiting Various Phenacene-Type Molecules

“…However, certain FETs based on phenacene have a high |V th | value, particularly in the case of a SiO 2 gate dielectric. 5,[12][13][14]16,[18][19][20][21][22][23]25,27,28 This may be the most serious problem associated with the utilization of phenacene molecules as the active layer in FET devices.…”

“…2 All FET data were taken from our own studies. 5,[12][13][14]16,[18][19][20][21][22][23][24][25]27,28 Each transfer curve was first classified as belonging to one of the six types, as reported before. 2 These six types of transfer curves are categorized as "model A−F," as shown in Figure 2.…”

“…Herein, we report the evaluation of μ eff of FETs using both single crystals and thin films of phenacene molecules with the aim of clarifying their real FET performance. High μ values have been reported for FETs with phenacene molecules, ,,− ,,− and an increase in the μ value using an extension of the benzene network has also been demonstrated. , In addition to these results, the potential application of phenacene molecules in future practical FET devices owing to their higher stability than acene molecules under atmospheric conditions is considered. However, a re-evaluation of the FET properties of phenacene molecules using the new indicator, μ eff , is necessary because of the significant claim mentioned above.…”

Synthesis, Photophysical and Electrochemical Study of 1,3,6,8‐Tetraarylsubstituted X‐Shaped Phenanthrene Derivatives

“…Phenanthrene has a curved structure that enables it to serve as a core building block for the synthesis of unique functional π‐electron molecules such as conjugated macrocycles, [14–18] helicenes [19–26] and phenacenes [27–29] . Efforts have been conducted to extend the conjugation of phenanthrenes by introducing aryl substituents at 3‐ and 6‐positions where its HOMO and LUMO orbital coefficients are large.…”

“…Phenanthrene has a curved structure that enables it to serve as a core building block for the synthesis of unique functional π-electron molecules such as conjugated macrocycles, [14][15][16][17][18] helicenes [19][20][21][22][23][24][25][26] and phenacenes. [27][28][29] Efforts have been con-ducted to extend the conjugation of phenanthrenes by introducing aryl substituents at 3-and 6-positions where its HOMO and LUMO orbital coefficients are large. Extension of conjugation by placement of aryl-units at the 9-and 10positions has led to creation of derivatives that have excellent photoluminescence (PL) properties.…”