Lessard Research Group - Next Generation Materials for Next Generation Applications

Design and Fabrication of Organic Electronic Devices

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Organic electronics, also known as plastic or printable electronics, use polymer or small carbon-based molecule semiconductors, making them inherently flexible with low manufacturing costs compared to traditional silicon based semiconductors. Current technologies based on organic electronics are novel flexible phone and television displays, highly efficient lighting with negligible heat production and plastic solar cells. With the increasing demand for flexible, inexpensive technology, it is believed that the demand for organic circuitry will exceed that of silicon electronics. More specifically, Over the past two decades, significant progress has been made in the performance of organic optoelectronic devices such as organic light emitting diodes (OLEDs), thin film transistors (OTFT), and photovoltaic cells (OPVs). In all of these organic optoelectronic devices, the processes of charge injection, charge transport, charge recombination and charge dissociation into holes and electrons and charge collection are critical to enhance their performance. In most of these cases, these phenomena are experienced within a material on the nanoscale and at the interface, therefore, the nanoscale control of structure, size, sequence, conformation, order, stacking, morphology and interface of the resulting functional polymers is essential for highly efficient electronic materials and devices. My research is directed towards the fabrication of novel OLEDs, OTFTs and OPVs by designing and synthesizing small molecules and polymers.

Recently we published an Open Acess review article on the use of Phthalocyanines in OTFTs and it is available from ACS Applied Materials & Interfaces website, free of charge. 

Recent publications on this topic:

Brixi, S.; Melville, O. A.; Boileau, N. Lessard, B. H.* The Influence of Oxygen and Temperature on the Performance of PBDB-T and P3HT in Organic Thin Film Transistors} J. Mater. Chem. C, ASAP, 2018. doi:10.1039/C8TC00734A

Rice, N. A.; Magnan, F.; Melville, O.; Brusso, J. L.*; Lessard, B. H.*; Organic Thin Film Transistors Incorporating Solution Processable 2D Thieno[3,2-b]thiophene Thienoacenes. Materials, 2018, 11,8, (OPEN ACCESSdoi:10.3390/ma11010008.

Melville, O. A.; Rice, N. A.; Therrien, I.; Lessard, B. H.*, Organic thin-film transistors incorporating a commercial pigment (Hostasol Red GG) as a low-cost semiconductor. Dyes and Pigments, 2018, 149, 449-455. doi: 10.1016/j.dyepig.2017.10.034

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