Difluorinated 6, 13‐Bis(triisopropylsilylethynyl)pentacene: Synthesis, Crystallinity, and Charge‐Transport Properties. Issue 6 (15th January 2015)

• Record Type: Journal Article
• Authors: Kim, Chang‐Hyun; Hlaing, Htay; Payne, Marcia M.; Parkin, Sean R.; Anthony, John E.; Kymissis, Ioannis
• Is Part Of: Chemphyschem. Volume 16:Issue 6(2015)
• Page Start: 1251
• Page End: 1257
• Publication Date: 2015-01-15
• Subjects: charge transport -- crystal structure -- organic field‐effect transistors -- pentacenes -- semiconductors; Chemistry, Physical and theoretical -- Periodicals; 541.05
• DOI: 10.1002/cphc.201402750
• Languages: English
• ISSNs: 1439-4235

Abstract

Abstract: Fluorination has been demonstrated to improve stability and processing in thiophene‐containing small‐molecule semiconductors. Here, the impact of partial fluorination on these parameters in a pentacene derivative is examined. Although the improvement in photostability is not as dramatic, there is a clear improvement in the stability of the chromophore upon fluorination. The improvement in processability is more dramatic; devices formed by spin‐coating with the fluorinated derivative perform substantially better than those formed from the nonfluorinated compound. Abstract : Crystal clear: Fluorination of 6, 13‐bis(triisopropylsilylethynyl)pentacene leads to a stable organic semiconducting material. Field‐effect transistors are fabricated by solution‐phase deposition, and the hole‐transporting channels show contact‐induced self‐assembly with highly ordered edge‐on crystallites. The analysis of a transfer characteristic reveals nonidealities related to the gate‐bias‐dependent mobility and the contact resistance.