报告题目：Dyes and Pigments for Organic Electronics & Photovoltaics
报 告 人：Frank Würthner 教授 （Universität Würzburg）
报告时间：2017年4月13日（周四）下午3:00
报告地点：北区科技园1号楼N308A报告厅
 
报告摘要：
In recent years we could witness a shift of paradigm in organic semiconductor research towards dyes and color pigments. Thus, after two decades of research focused on conjugated polymers and oligothiophene as well as acene based organic semiconductor molecules most recent work in several laboratories demonstrated high charge carrier mobilities > 1 cm2V-1s-1 for various classes of dyes and pigments. These results are remarkable owing to the presence of dipolar functional groups in these compounds which was believed to result in large reorganization energies and bad transport properties. Obviously this view needs to be reassessed. In particular for organic photovoltaics the success of several low band gap conjugated oligomers and polymers (containing dipolar functional groups) as well as small molecule based organic colorants appears highly promising.
In this lecture I will give an overview on our work on n-type organic semiconductors based on naphthalene and perylene bisimides and p-type organic semiconductors based on merocyanines, squaraines and diketopyrrolopyrroles. A particular focus will be given on the most unusual highly dipolar merocyanine dyes which exhibit outstanding performance in bulk heterojunction solar cells with PCE > 6%. Our recent demonstration of hole mobilities up to 1.3 cm2V-1s-1 in organic thin film devices and up to 8.6 cm2V-1s-1 in organic single crystals clearly corroborates the view that the presence of dipolar groups does not imply bad transport properties. Dyes and colorants are accordingly very versatile for organic electronics and organic photovoltaics.
 
References
[1] M. Gsänger, D. Bialas, L. Huang, M. Stolte, F. Würthner, Adv. Mater. 2016, 28, 3615–3645: Organic Semiconductors based on Dyes and Color Pigments.
[2] S. Seifert, K. Shoyama, D. Schmidt, F. Würthner, Angew. Chem. Int. Ed. 2016, 55, 6390–6395: An Electron-Poor C64 Nanographene by Palladium-Catalyzed Cascade C–C Bond Formation: One-Pot Synthesis and Single-Crystal Structure Analysis
[3] A. Arjona-Esteban, J. Krumrain, A. Liess, M. Stolte, L. Huang, D. Schmidt, V. Stepanenko, M. Gsänger, D. Hertel, K. Meerholz, F. Würthner, J. Am. Chem. Soc. 2015, 137, 13524–13534: Influence of Solid-State Packing of Dipolar Merocyanine Dyes on Transistor and Solar Cell Performances
[4] T. He, M. Stolte, C. Burschka, N. H. Hansen, T. Musiol, D. Kälblein, J. Pflaum, X. Tao, J. Brill, F. Würthner, Nat. Commun. 2015, 6, 5954: Single-Crystal Field-Effect Transistors of New CI2-NDI Polymorph Processed by Sublimation in Air 
 
个人简历：

 
since 2002 Professor, Chair of Organic Chemistry II, U Würzburg
since 2010 Director, Center for Nanosystems Chemistry, U Würzburg
Honors and Awards
2016Member German National Academy of Science Leopoldina
2016Elhuyar-Goldschmidt Award (Royal Chemical Society Spain)
2016Elsevier Lecture Award (Japanese Photochem. Association)
2016Fellow of the Royal Society of Chemistry (FRSC)
2015Emanuel Vogel Lecture Award (University of Cologne)
since 2014Listed as Thomson Reuters Highly Cited Researcher
2014K. S. Krishnan Lecture Award (Indian Association of the Cultivation of Science, Kolkata)
2010/11Visiting Professor at the Institute of Chemistry, Chinese Academy of Science (Beijing)
2002Arnold Sommerfeld Award (Bavarian Academy of Science)
Publications            > 350 publications, h-index: 83