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Organic, planar, and electron deficient small molecules were utilized as acceptors in the first reported bilayer heterojunction solar cells, however, current state-of-the-art organic photovoltaic (OPV) cells utilize fullerene derivatives as acceptor molecules. Recently, intensive efforts have been directed towards the development and understanding of soluble, non-fullerene, organic small molecules to fabricate bulk heterojunction (BHJ) solar cells. These efforts have been aimed at overcoming the inherent limitations of fullerene compounds such as the limited spectral breadth, air instability, and the typically higher production costs of fullerenes. In this focused review, we have highlighted the most recent progress over the last couple of years towards developing n-type organic small molecules utilized in BHJ devices in order to provide insight towards improving the overall performance of OPVs. Ala'a F. Eaiha was born in Jerusalem, Palestine. He obtained his BSc and MSc in chemistry from the Hashemite University, Jordan. Ala'a carried out his graduate research under the supervision of both Dr Musa I. El-Barghouthi and Dr Adnan A. Badwan. Aer spending two years doing research at the Jordanian pharmaceutical Manufacturing Company, Jordan, he moved to Canada, where he completed his PhD in surface chemistry under the guidance of Dr Matthew F. Paige at the University of Saskatchewan. Recently, Ala'a has received an NSERC CREATE fellowship to carry out postdoctoral research at

High electron mobility in a series of phthalimide–thiophene small molecules has been demonstrated when incorporated into thin film transistors.

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The supramolecular chemisorption of CO2 by the oligosaccharide chitin-acetate (CA) in DMSO as a green, binary sorbent-based system offers a potential, novel and eco-friendly approach for post combustion capture applications.

A novel oligochitosan/DMSO system as a green sorbent for CO2capturing.

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