Low-Band-Gap Photoconductive Hybrid Organogel

  • ChemPubSoc Europe Logo
  • Author: ChemNanoMat
  • Published Date: 16 June 2018
  • Source / Publisher: ChemNanoMat/Wiley-VCH
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA
thumbnail image: Low-Band-Gap Photoconductive Hybrid Organogel

Organogels can be an excellent platform for efficient energy- and electron transfer. This is a prerequisite for optoelectronic devices such as organic light emitting diodes (OLEDs) and organic solar cells (OSCs).


Ayyappanpillai Ajayaghosh, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Trivandrum, India, and colleagues have developed a hybrid organogel consisting of a diketopyrrolopyrrole based p-type organogelator and a fullerene derivative as an electron acceptor (components pictured). The diketopyrrolopyrrole derivative undergoes a supramolecular organization through extensive hydrogen bonding in non-polar solvents, which results in gelation.


This conjugate p-type gelator shows very broad absorption and a low band gap, which maximizes the use of sunlight. The researchers found that the resulting self-assembled nanofibers show enhanced intrinsic photoconductivity upon the addition of a fullerene-based acceptor. The increase in photoconductivity is attributed to the efficient photoinduced charge separation at the donor-acceptor interface.


 

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