南方科技大学郭旭岗副教授学术报告通知
应3777金沙娱场城光电信息科学与工程专业邀请，南方科技大学郭旭岗副教授将于10月21日面向全校师生做含酰胺基团和非共价硫氧键的高性能半导体共轭聚合物学术报告，欢迎广大师生参加。
报告人：郭旭岗
报告题目： High-Performance Polymer Semiconductors Incorporating Imide Groups and Noncovalent Sulfur-Oxygen Interactions（含酰胺基团和非共价硫氧键的高性能半导体共轭聚合物）
报告时间：2017年10月21日（星期六）上午9：00
报告地点：哈工大材料楼（322报告厅）
报告摘要:
We present the imide-functionalized polymer semiconductors for high-performance organic thin-film transistors (OTFTs) and polymer solar cells (PSCs). The imide-functionalized arenes include 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 achieve a 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 organic electronics.
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) and excellent PCEs (> 10%) are achieved in PSCs. Hence, the intramolecular sulfur-oxygen interaction is an effective strategy for materials innovation in organic electronics.
3777金沙娱场城
2017年10月19日
