報告題目：Design, Synthesis, and Applications of High-Performance
Polymer Semiconductors in Organic Electronics
報告人：郭旭崗教授、博士生導師
時間：2017年9月22日（星期五）上午10：00-12:00
地點：思學樓B110
We present the imide-functionalized polymer semiconductors for
high-performanceorganic thin-film transistors (OTFTs) and polymer solar cells
(PSCs). The imide-functionalized arenesinclude naphthalene diimide,
phthalimide, thiophene imide, bithiazole imide, bithiophene imide, and various
bithiophene imide derivatives with precisely controlled conjugation length and
defined structure. Some other novel imide-functionalized arenes will also be presented.
By copolymerizing with various electron donor co-units, we are able to achievea
series of polymer semiconductors with tunable charge carrier polarities (n-type,
p-type, and ambipolar) and substantial mobilities. The high mobilities, narrow
bandgaps, and low-lying HOMOs enable the imide-functionalized polymers as
excellent donor materials in PSCs, and the resulting solar cells show highly
promising power conversion efficiencies (PCEs). The materials chemical structure-property-device
performance correlation is established, which should guide materials design in organicelectronics.
Intramolecular sulfur-oxygen interaction has shown great success in designing high-performance
organic semiconductors due to good materials solubility and high-degree of
backbone planarity. However, the derived semiconductors usually have high-lying
HOMOs due to the strong electron donating nature of alkoxy chain, which leads
to degraded stability in OTFTs and small open-circuit voltages in PSCs (<
0.6 V). By wisely choosing the arenes and controlling the substitution pattern
of the alkoxy chains, we have successfully synthesized a series of novel
electron-rich building blocks featuring intramolecular sulfur-oxygen
interaction, and their incorporation into polymer backbones affords the
resulting semiconductors with high-degree of backbone planarity, close intermolecular
packing, low-lying HOMOs, and widely tunable bandgaps, which lead to remarkable
charge carrier mobility with good OTFT stability. At meantime, substantial Vocs
(~ 0.8 V) andexcellent PCEs(>10%) are achieved in PSCs. Hence, the
intramolecular sulfur-oxygen interaction is an effective strategy for materials
innovation in organic electronics.
報告人簡介：郭旭崗,博士，南方科技大學材料科學與工程系教授。2009年畢業于美國肯塔基大學獲得化學博士學位（導師：Mark D. Watson教授）, 2009年至2012年在美國西北大學化學系和材料研究中心從事博士后研究(導師：Tobin J. Marks教授，2017
Priestly Medalist),
于2012年底加入南方科技大學材料科學與工程系。郭教授自攻讀博士以來一直從事高性能有機半導體材料合成和器件應用的研究，工作主要集中在酰亞胺基高分子半導體及基于分子內硫-氧非共價鍵作用的高分子半導體材料的設計、合成、及其在高性能有機場效應晶體管和聚合物太陽能電池中的應用。至今為止，在Chem. Rev., Nature Photonics,
JACS, Angew. Chem., Adv. Mater., PNAS
等高水平期刊發表學術論文30余篇。多篇論文在封面發表，并被媒體廣泛報道，論文引用2900余次，單篇引用100次以上論文12篇，申請國際發明專利10余項，成果轉化1項。受包括Chem. Rev.和Nature Energy在內的多家雜志和出版社約稿撰寫綜述和專著,作邀請報告20余次。
主辦單位：科研處，材料科學與工程學院
