江浪教授 [中国科学院化学所]

Title: Monolayer molecular crystals and optoelectronicdevices（单分子层分子晶体与光电器件）

Language:  Chinese presentation with English slides

Time: 15:00 - 16:00 PM, Monday, January 29, 2024

Place: Onsite：Conference room A417, HPSTAR (Beijing)            Online: Tencent Meeting: https://meeting.tencent.com/dm/1Ad1jx4nepxy Meeting ID: 749-694-426

Host:  Dr. Huiyang Gou

Abstract:

Due to its unique advantages such as design structure, easy regulation of performance, low temperature process and good flexibility, the conjugated molecular materials drive innovation of new molecules, new physical properties, new theories and new functions, and have great application prospects in the frontier intersection fields such as information technology, energy conversion and intelligent perception. However, molecular materials bounded by weak van der Waals forces typically rely on the "jump mode" of polarons to achieve charge conduction, resulting in low carrier mobility and severely limiting the development of high-performance organic electronic devices and circuits. In molecular crystal materials with periodic arrangement and low defect concentration, band-like transport behavior similar to that in traditional inorganic semiconductors has been observed, and its mobility has been greatly improved, which is expected to meet the major strategic needs of the organic semiconductor chip industry. Focusing on the transport mechanism of molecular crystal materials and the application of high-performance devices and circuits, we achieved the controllable preparation of high-quality monolayer crystals by creating new molecular materials, integrated the construction of in-situ device testing equipment, revealed the defect mechanism of band-like charge transport and key factors for performance improvement, and constructed high-performance devices with low defects and low contact resistance. It also promotes the application of monolayer circuits.

共轭分子材料因其结构可设计、性能易调控、低温制程和柔性好等独特优势，驱动新分子、新物性、新理论和新功能创新，在信息技术、能源转化和智能感知等前沿交叉领域具有重大应用前景。然而，以弱范德华力结合的分子材料，通常依赖极化子的“跳跃模式”来实现电荷传导，导致载流子迁移率低，严重限制了高性能有机电子器件和电路的发展。在具有周期排列和低缺陷浓度的分子晶体材料中曾观察到类似于传统无机半导体中的类能带输运行为，其迁移率获得大幅提升，有望满足有机半导体芯片产业重大战略需求。我们聚焦分子晶体材料的输运机制和高性能器件与电路应用，通过创制新分子材料实现了高质量单分子层晶体的可控制备，融合原位器件测试装备搭建，揭示了类能带电荷输运的缺陷机制和性能提升关键因素，构建了低缺陷、低接触电阻高性能器件，并推动了单分子层电路应用。

Biography of the Speaker:

Lang Jiang 

Professor 

Institute of Chemistry, Chinese Academy of Sciences

Email: ljiang@iccas.ac.cn  

Education and working Experience:

中国科学院化学所研究员、博士生导师、国家杰出青年科学基金获得者。

2004年于湖南大学应用物理系获得学士学位。

2011年在中科院化学所获得博士学位，后作为助理研究员留所工作。

2013年英国剑桥大学物理系从事博士后研究。

2016年回国，任化学所研究员，课题组组长。担任Wiley旗下Nano Select杂志副主编， Chin. Chem. Lett. 编委，化学通报编委。曾获得中科院院长特别奖，中科院百篇优秀博士论文，英国皇家学会中英奖学金，中国科学院卢嘉锡青年人才奖，中国分析测试协会科学技术一等奖（第一完成人）。