(Invited) Development of Tailor Made Donor-Acceptor Pairs for Fullerene-Free Organic Solar Cells

Monday, 25 May 2015: 10:30
Conference Room 4L (Hilton Chicago)
G. C. Welch (Dalhousie University)
Organic solar cells (OCS) are now an established clean energy technology.1 These photovoltaic devices can be printed at low temperatures onto large area, flexible substrates, and can be made semi-transparent, making them a low-cost alternative to traditional inorganic devices, and can be utilized in many niche applications.  Current state-of-the art relies on a polymer-fullerene bulk-heterojunction active layer, with power conversion efficiencies reaching 10%.2 While promising, certain limitations have prevented large scale commercialization. In an effort to advance OCS, the development of low-cost and sustainable active layer materials that can be mass-produced and yield high performance devices is essential. One area of our research at Dalhouise University centers on the development of small molecue based organic p-conjugated materials to replace the common fullerene acceptors.3 This talk will highlight our materials design strategy and discuss key thin-film characterization data and solar cell performance.

(1)          Su, Y.-W.; Lan, S.-C.; Wei, K.-H. Mater. Today 2012, 15, 554.

(2)          Li, G.; Zhu, R.; Yang, Y. Nat. Photonics 2012, 6, 153.

(3)          Eftaiha, A. F.; Hill, I. G.; Sun, J.-P.; Welch, G. C. J. Mater. Chem. A 2014, 2, 1201.