报告题目：Fullerene and Nonfullerene-based OPVs

报告人：Prof. Han Young Woo

报告人单位：Korea University

报告时间：2016年12月12日（星期一）16:00-17:30

报告地点：能源楼216会议室

报告摘要：

Over the past few decades, polymer solar cells (PSCs) have made a significant progress, showing their potential in low-cost, flexible, lightweight, portable and large-area energy-harvesting devices. Although PC₆₁BM and/or PC₇₁BMstructures have been exploited successfully inPSCdevices,efforts to modify the fullerene structures for further improvingthe device performance have been unsuccessful due to theinflexibility in molecular design, difficult purification, poormorphological stability, and limited light absorption in the visibleregion, etc.In recent years, nonfullerene acceptors have emerged as an alternative candidate of n-type materials to overcome the difficulties of fullerene derivatives in tuning optical and electronic properties. The strong and easily adjustable absorption characteristics of nonfullerene acceptors have been considered a strong point compared to fullerene-type structures.This talk presents a high performance nonfullerene organic solar cell with well-organized donor–acceptor crystalline structures using PPDT2FBT as the donor and small molecular nonfullerene acceptor, NIDCS-HO, as the optimal acceptor.As a result, the optimal device exhibited a maximum efficiency of 7.64% with aV_ocof 1.03 V, aJ_scof 11.88 mA/cm², and a FF of 0.63. This shows that optimal combination of photovoltaic donor and acceptor pairs with complementary absorption, well-aligned frontier energy levels, and well-intermixed crystalline morphology can provide great potential to further increase the power conversion efficiency of nonfullerene solar cells to exceed fullerene-based devices.

报告人简介：

Dr.Han Young Woois the professor of Dept. of Chemistry, College of Science, Korea University. He received his B.S. in Chemistry, Sogang University in 1994, M.S. in Chemistry, Sogang University in 1996, and Ph.D. in Chemistry, Korea Advanced Institute of Science and Technology (KAIST) in 1999. He was Principal Researcher in R&D Center for Chemical Technology, Hyosung Corp from 1999 to 2003, and then moved to University of California at Santa Barbara (UCSB) asPost-doctoral Researcher from2003to 2006. He is aProfessor in Korea University from 2006. His research interests include synthesis of conjugated polymers for organic electronics and bio-related applications, and water-soluble conjugated molecules (or polymers) and applications in electronic devices, biosensors, TPA fluorophores for biological imaging, etc.

Selected publications (total ~150 SCI papers)

　　1.M. A. Uddin,Y. Kim,R. Younts, W. Lee, B. Gautam, J. Choi, C. Wang, K. Gundogdu*, B. J. Kim*, H. Y. Woo*, “Controlling energy levels and blend morphology for all-polymer solar cells via fluorination of a naphthalene diimide-based copolymer acceptor”, Macromolecules2016,49(17), 6374–6383

　　2.O. K. Kwon, M. A. Uddin, J.-H. Park, S. K. Park, T. L. Nguyen, H. Y. Woo*, S. Y. Park*, “A High Efficiency Nonfullerene Organic Solar Cell with Optimized Crystalline Organizations”,Adv. Mater.2016, 28 (5), 910-916

　　3.J.-E. Jeong, B. Kim, S. Woo, S. Hwang, G. C. Bazan,* H. Y. Woo*, “Principal Factors that Determine the Extension of Detection Range in Molecular Beacon Aptamer/ Conjugated Polyelectrolyte Bioassays”,Chem. Sci.2015, 6, 1887-1894.

　　4.H. Kang, M. A. Uddin, C. Lee, K.-H. Kim, T. L. Nguyen, W. Lee, Y. Li, C. Wang, H. Y. Woo*, B. J. Kim*, “Determining the Role of Polymer Molecular Weight for High-Performance All-Polymer Solar Cells: Its Effect on Polymer Aggregation and Phase Separation”,J. Am. Chem. Soc.2015, 137, 2359-2365

　　5.T. L. Nguyen, H. Choi, S.-J. Ko, M. A. Uddin, B. Walker, S. Yum, J.-E. Jeong, M. H. Yun, T. J. Shin, S. Hwang, J. Y. Kim,* and H. Y. Woo*, “Semi-Crystalline Photovoltaic Polymers with Efficiency Exceeding 9% in a ~300 nm Thick Conventional Single-Cell Device”,Energy Environ. Sci.2014,7 (9), 3040 – 3051.

　　6.S. Yum, T. An, X. Wang, W. Lee, M. A. Uddin, Y. J. Kim, T. L. Nguyen, S. Xu, S. Hwang, C. Park*, H. Y. Woo*“Benzotriazole-Containing Planar Conjugated Polymers with Non-Covalent Conformational Locks for Thermally Stable and Efficient Polymer Field-Effect Transistors”,Chem. Mater.2014, 26(6), 2147-2154.

　　7.W. Lee, G.-H. Kim, S.-J. Ko, S. Yum, S. Hwang, S. Cho, Y.-H. Shin, J. Y. Kim*, H. Y. Woo* “Semi-crystalline D-A Copolymers with Different Chain Curvature for Applications in Polymer Opto-electronic Devices”,Macromolecules2014,47(5), 1604–1612.

　　8.Nguyen, B. L.; Jeong, J.-E.; Jung, I. H.; Kim, B.; Le, V. S.; Kim, I.; Kyhm, K.; Woo, H. Y.* “Conjugated polyelectrolyte and aptamer based potassium assay via single- and two-step fluorescence energy transfer with a tunable dynamic detection range”,Adv. Funct. Mater.2014, 24(12), 1748-1757.

　　9.Lee, B. H.; Jung, I. H.; Woo, H. Y.*; Shim. H.-K.; Kim, G.; Lee, K* “Multi-charged conjugated polyelectrolytes as a versatile work function modifier for organic electronic devices”,Adv. Funct. Mater.2014,24, 1100-1108.

　　10.Kim, B.; Jung, I. H.; Kang, M.; Shim, H.-K.*; Woo, H. Y.* “Cationic Conjugated Polyelectrolytes-Triggered Conformational Change of Molecular Beacon Aptamer for Highly Sensitive and Selective Potassium Ion Detection”,J. Am. Chem. Soc.2012, 134, 3133-3138.