Hole Mobility of a Liquid Organic Semiconductor

Abstract

The first detailed study of charge transport through a liquid organic semiconductor (LOS) is reported with the goal of elucidating the effects of molecular motion on charge transport through molecular liquids. Using a liquid, silyl ether-substituted triarylamine, hole transport mobilities were obtained over a wide range of temperatures above the glass transition temperature of the material. Analysis of this data reveals that molecular motion(s) have a negligible effect on macroscopic charge transport through a molecular liquid. The results strongly resemble transport behavior found in conventional, disordered solids and suggest that silyl ether-substituted LOSs may be good candidates for integration into electronic devices, by those who are familiar with the application of traditional triarylamines, where their unique physical state can or could be exploited.

Charge Carrier Mobility of Siliconized Liquid Triarylamine Organic Semiconductors by Time-of-Flight Spectroscopy.

“…We have also found that charge carrier mobility is not significantly affected by moving the siliconized triarylamine through its respective glass transition temperature (T g ), that is, the physical state of the molecule does not seem to be the primary determinant of charge transport behavior. These observations are broadly in line with our earlier report on 2-TIPS 12 and are based on the measurement of the charge carrier mobility using our novel time-of-flight (TOF) method previously described. 12 …”

“…These observations are broadly in line with our earlier report on 2-TIPS 12 and are based on the measurement of the charge carrier mobility using our novel time-of-flight (TOF) method previously described. 12 …”

“…12 All molecules were composed of a triarylamine core functionalized with short silicone chains. Each was prepared according to procedures described in detail in our previous publication.…”

Room Temperature Liquid Formulation by Attaching Alkyl Chains on ^|^pi;-Conjugated Molecules

“…21 In comparison to a pure CdSe NCs lm, the composite lm containing 25 wt% CdSe NCs in liquid 8 showed a 200% photocurrent enhancement under white light irradiation. Inspired by our molecular design strategy, a number of photoconductive, amorphous liquid materials, such as carbazole , 22 pyrene , 23 porphyrin , 24 and triarylamine 25 based room temperature liquids, have also been reported.…”

Tunable and flexible solvent-free liquid organic distributed feedback lasers

“…Liquid organic semiconductors have received much attention as promising materials for organic optoelectronic applications in recent years. [1][2][3][4] These fluidic semiconducting materials present strong advantages over conventional organic semiconductors in solid-state thin films, such as solvent-free device processing, ultimate mechanical flexibility and uniformity, and tunable optoelectronic responses. Liquid organic semiconductors also allow for convectional circulation of active materials in microfluidic structure, which can lead to degradation-free characteristics.…”