Synthesis and Optoelectrical Characterization of Novel Squaraine Dyes Derived from Benzothiophene and Benzofuran.

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ID: 20731
2018
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Abstract
Synthesis and photophysical characterizations of two novel small molecules and with D-A-D molecular structure consisting of squaraine as central unit and benzothiophene and benzofuran as end groups are being reported. Apart from very sharp and intense light absorption by these molecular sensitizers in near-infrared (NIR) wavelength region, their possibility as small molecular organic semiconductor was also explored after fabricating organic field-effect transistors (OFETs). Results obtained from photophysical, electrochemical, and quantum chemical studies were combined to elucidate the structural and optoelectronic properties. Electrical characterization pertaining to the charge-transport properties carried after OFET fabrication exhibited field-effect mobilities of 4.0 × 10 and 5.4 × 10 cm/(V s) for and , respectively. After thermal annealing at 130 °C, the field-effect mobility was found to increase for both squaraine dyes. Relatively facile carrier transport in compared to that of could be attributed to relatively higher backbone planarity as indicated from optimized molecular structure obtained after density functional theory calculations. This work may guide for further molecular design and synthesis of novel squaraine dyes for high-performance OFET applications.
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rao2018synthesisacs Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Rao, G Hanumantha;Pandey, Manish;Narayanaswamy, Kamatham;Srinivasa Rao, Ravulakollu;Pandey, Shyam S;Hayase, Shuzi;Singh, Surya Prakash;
Journal ACS omega
Year 2018
DOI
10.1021/acsomega.8b01240
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