Rational Material Design, Interface, and Device Engineering for High-Performance and Stable Polymer Solar Cells
Advances in controlled synthesis, processing, and tuning of the properties of organic conjugated polymers have enabled significantly enhanced performance of organic electronic devices. Our laboratory employs a molecular engineering approach to develop processible and high charge carrier mobility polymers for enhancing power conversion efficiency of solar cells. We have also developed several innovative strategies to modify the interface of bulk-heterojunction devices and create new device architectures to fully explore their potential for solar window applications.
The performance of polymer solar cells is strongly dependent on their efficiency in harvesting light, exciton dissociation, charge transport, and charge collection at the metal/organic/metal oxide interfaces. In this talk, the integrated approach of combining material design, interface, and device engineering to significantly improve the performance of polymer photovoltaic cells will be discussed. Specific emphasis will be placed on the low band-gap polymers development with low reorganizational energy and proper energy levels, optimized morphology of bulk-heterojunction layer, and minimized interfacial energy barriers with functional surfactants and graphene oxide. At the end, several new device architectures and optical engineeing strategies will be discussed to explore the full promise of polymer solar cells.
1. “Kinetic Control of Recombination in Organic Photovoltaics: The Role of Spin”, A. Rao, P. C. Y. Chow, S. Gélinas¬, C. W. Schlenker, C.-Z. Li, H.-L. Yip, A. K-Y. Jen, D. S. Ginger, R. H. Friend, Nature, 2013, 500, 435.
2. “High Performance Perovskite-Polymer Hybrid Solar Cells via Electronic Coupling with Fullerene Monolayers”, A. Abrusci, S. D. Stranks, P. Docampo, H.-L. Yip, A. K.-Y. Jen and H. J. Snaith, Nano Lett., 2013, 13(7), 3124.
3. “Solution Processible Conductive Fullerenes”, C.-Z. Li, C.-C. Chueh, F. Ding, H-L. Yip, X. Li, and A. K.-Y. Jen, Adv. Mater., 2013, 25, 2457.
4. “Doping of Fullerenes via Anion-Induced Electron Transfer: A Possible Mechanism for Surfactant Facilitated High performance Polymer Solar Cells”, C.-Z. Li, C.-C. Chueh, F. Ding, H.-L. Yip, P.-W. Liang, X. Li, and A. K.-Y. Jen, Adv. Mater., 2013, 25, 4425.
5. “Photocurrent Losses in High-Voltage Organic Solar Cells”, C. W. Schlenker, K.-S. Chen, H.-L. Yip, C.-Z. Li, L. R. Bradshaw, S. T. Ochsenbein, D. R. Gamelin, A. K.-Y. Jen, and D. S. Ginger, J. Am. Chem. Soc., 2012, 134(48), 19661.