Solution-based 5,6,11,12-tetrachlorotetracene crystal growth for high-performance organic thin film transistors

Zhengran He, Nereo Lopez, Xiaoliu Chi, Dawen Li

Research output: Contribution to journalArticlepeer-review

48 Scopus citations

Abstract

Abstract 5,6,11,12-Tetrachlorotetracene is a p-type semiconductor with high hole mobility due to its face-to-face molecular packing and improved electronic coupling. In this study, we demonstrate for the first time the solution processing of 5,6,11,12-tetrachlorotetracene with crystal alignment for the application of organic thin film transistors (OTFTs). Enhanced crystal orientation is achieved by confining the solvent evaporation in a restricted space, which introduces a capillary force and effectively aligns the 5,6,11,12-tetrachlorotetracene crystals. At the same time, a double solvent approach (chloroform/methanol) is utilized to tune the crystal size. The addition of polar hydroxyl groups from methanol weakens the interaction between the less polar 5,6,11,12-tetrachlorotetracene solutes and chloroform solvent, and leads to the formation of supramolecular aggregation. The aggregation acts as nucleation seeds for the crystallization of 5,6,11,12-tetrachlorotetracene semiconductor with enlarged crystal width. As a result, the 5,6,11,12-tetrachlorotetracene based OTFTs demonstrate a maximum hole mobility of 1.1 cm2/Vs, which is the highest value ever reported from the solution-processed OTFTs based on 5,6,11,12-tetrachlorotetracene semiconductor.

Original languageEnglish (US)
Article number3033
Pages (from-to)191-196
Number of pages6
JournalOrganic Electronics
Volume22
DOIs
StatePublished - Jul 2015

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • General Chemistry
  • Condensed Matter Physics
  • Materials Chemistry
  • Electrical and Electronic Engineering

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