Band Offsets and Interface State Densities in Crystalline and Amorphous Oxide Systems for Photonics, Sensors and Electronics

该项目由电气、通信和网络系统部（ECCS）的电子、光子学和磁性器件计划（EPMD）和材料研究部（DMR）的电子和光子材料计划（EPM）共同资助。技术描述：该项目的研究目标是更好地理解介质和半导体之间的带偏移和界面的基本材料特性。研究了不同介质（SiNX， Sc2O3和（CeTb）MgAl11O19）在ZnO， CdZnO， ZnMgO晶体上的能带偏移，以及后两种介质在a-IGZO上的能带偏移，并测量了所有这些介质在a-IGZO上的界面态密度和热稳定性。光学和电学技术被用来表征带偏移、带隙和界面态密度。非技术描述：晶体和非晶态电子氧化物在气体和化学传感、用于固态照明的紫外线发光二极管、平板、柔性和触摸屏显示器以及太阳能电池方面的兴趣越来越大。透明导电氧化物在这些产品中的重要性导致近年来研究的激增，以发现新材料，降低制造成本和改善性能。基于氧化物的薄膜晶体管具有实现卷对卷显示的巨大潜力。如果这能实现，它也可能在平视显示器、挡风玻璃、电子书或轻型计算机上创造新的应用，并最终改变整个显示行业。该项目旨在开发一种新型固态材料，这种材料可以在低温下制造，从而可以在纸张和塑料等廉价基材上使用。此外，跨学科的教育活动向公众介绍这些异国情调和使能的材料。PI从事本科生和研究生指导，K-12外展，会议专题讨论会组织和编写教科书。

This project is jointly funded by the Electronics, Photonics, and Magnetic Devices Program (EPMD) in the Division of Electrical, Communications and Cyber Systems (ECCS) and the Electronic and Photonic Materials Program (EPM) in the Division of Materials Research (DMR).Technical Description: The research objective of this project aims to develop a better understanding of the fundamental materials properties of the band offsets and interfaces between dielectrics and semiconductors. It covers investigation of the band offsets for different dielectrics (SiNX, Sc2O3 and (CeTb)MgAl11O19) on crystalline ZnO, CdZnO, ZnMgO and also for the latter two on a-IGZO and measurement of interface state densities and thermal stability of all these dielectrics on a-IGZO. Optical and electrical techniques are used to characterize the band offsets, bandgaps and interface state densities.Non-technical Description: Crystalline and amorphous electronic oxides are gaining interest for gas and chemical sensing, ultra violet light-emitting diodes for solid state lighting, flat-panel, flexible and touch-screen displays and solar cells. The importance of transparent conducting oxides in these products has led to a surge of research in recent years to discover new materials, lower the costs of manufacture and improve properties. Oxide-based thin film transistors have great potential for realizing a roll-to-roll display. If this can be realized, it may also create new applications in heads-up displays, windshields, electronic books or light weight computers and eventually change the entire display industry. This project is designed to develop a new class of solid-state materials that can be made at low temperatures, allowing their use on cheap substrates like paper and plastic. In addition, cross-disciplinary education activities introduce the public to these exotic and enabling materials. The PI engages in undergraduate and graduate mentoring, K-12 outreach, conference symposia organization, and writing a textbook.