A small molecule composed of anthracene and thienothiophene devised for high-performance optoelectronic applications
摘要:
An asymmetric small molecule composed of anthracene and alkylated thienothiophene (2-(anthracen-2-yl)-5-hexylthieno[3,2-b]thiophene) was synthesized via the Suzuki coupling reaction. The thermal stability, photochemical properties, and morphological characteristics were investigated using thermogravimetric analysis, differential scanning calorimetry, cyclic voltammetry, UV-visible spectroscopy, and X-ray diffraction techniques. The compound demonstrated a good thermal stability of 5% at a decomposition temperature of 336 degrees C. The solution-processed single-crystal transistor, devised with 2-(anthracen-2-yl)-5-hexylthieno[3,2-b]thiophene, exhibited high performance with a hole mobility of 0.1 cm(2)/Vs. Furthermore, by utilizing the high mobility of 2-(anthracen-2-yl)-5-hexylthieno[3,2-b]thiophene, we demonstrated its unprecedented high photoresponsivity of 3370 A/W, a finding that can be attributed to the very efficient photoconductive behavior of a single crystal of 2-(anthracen-2-yl)-5-hexylthieno[3,2-b]thiophene. (C) 2015 Elsevier Ltd. All rights reserved.
because of the poor compatibility between the ruthenium(II) sensitizer and the cobalt redox species. To address this problem and achieve higher power conversion efficiencies (PCEs), we introduce here six new cyclometalated ruthenium(II)-based dyes developed through ligand engineering. We tested DSCs employing these ruthenium(II) complexes and achieved PCEs of up to 9.4% using cobalt(3+/2+)-based electrolytes
Synthesis and TFT Properties of Fluorenyl Cored Conjugated Compound for Organic Thin Film Transistors
作者:You Geun Kim、Baji Shaik、Yong Ju Jang、Song Yi Park、Jin Young Kim、Sang-Gyeong Lee
DOI:10.1166/jnn.2016.11063
日期:2016.3.1
The 5,5′-(4,4′-(9,9-dioctyl-9H-fluorene-2,7-diyl)bis(4,1-phenylene))bis(2-hexylthieno[3,2-b]thiophene) FCBT (6) was synthesized by connecting the fluorenyl, thienothiophenyl and phenyl units. The compound was characterized by FT-IR, H1NMR, C13NMR and mass spectroscopy. The compound has shown good solubility and thermal stability over 417 °C. The compound has shown hole mobility of 4.76 × 10−6 cm2/Vs. The on–off ratio and threshold voltage were 7.5 × 102 and −8.26 V respectively.