Advanced organic and hybrid electronic devices for high-resolution Hall effect and photocurrent spectroscopy.

非技术性：该研究项目侧重于基于两类新型材料的晶体管和光电探测器的工作原理。有机半导体和有机-无机杂化钙钛矿材料在太阳能电池、柔性电子器件、传感器和致动器等方面具有广阔的应用前景。这些材料的高纯度单晶被期望有效地传导电荷，具有长的电荷载流子寿命，并且耐受缺陷。所有这些特性对于未来的光电子学应用都是有吸引力的。研究小组将在各种外部刺激下，以高精度表征有机和钙钛矿器件的导电性。刺激包括校准的机械应变，通过弯曲柔性设备，可见光照明和变化的温度进行。这些研究将更好地了解这些新型材料的独特性能和基于它们的设备的行为。该项目将促进柔性晶体管和光电探测器的发展，并产生强大的方法来表征这些设备。该项目将为学生提供对新兴电子材料进行研究的机会。有抱负的研究人员将学习半导体科学，获得现代研究技能，并为科学和技术的职业生涯做好准备。技术：基于新兴的高度结晶有机半导体和钙钛矿材料的新型电子器件正在紧张的研究中，它们在下一代光电应用中的潜在用途。该项目的主要重点是显着推进的基本理解的工作原理和微观机制的行为的有机场效应晶体管和钙钛矿光电导体。研究小组计划通过采用高分辨率交流霍尔效应测量的独特而强大的组合，校准单轴机械应变的原位应用，可变温度和/或光激发，以及使用互补的理论建模来实现这一目标，以了解这些器件中的固有（无陷阱）电荷载流子迁移率，电子空穴复合率，载流子寿命和扩散长度。该项目的实施预计将导致开发高性能，灵活的有机场效应晶体管的超薄有机晶体和优化的钙钛矿光电导体与化学钝化表面，导致高精度霍尔效应测量的新方法，特别是重要的紧急？软的？和柔性电子，更广泛地有助于更好地理解新型半导体器件的电子、光子和磁输运特性。该项目的跨学科性质为光电子学和半导体器件工程领域提供了极好的教育、人力资源和推广机会。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

Non-technical:This research project focuses on the working principles of transistors and photo-detectors based on two classes of novel materials. Organic semiconductors and organic-inorganic hybrid perovskites are promising materials for applications in solar cells, flexible electronics, sensors and actuators. High-purity single crystals of these materials are expected to conduct charge efficiently, have long charge carrier lifetimes, and tolerate defects. All of these properties are attractive for future applications in optoelectronics. The research team will characterize electrical conduction with high-precision of organic and perovskite devices under various external stimuli. Stimuli include calibrated mechanical strain, performed by bending flexible devices, illumination with visible light and varied temperature. These studies will yield a better understanding of the unique properties of these novel materials and behavior of devices based on them. The project will boost the development of flexible transistors and photo-detectors and yield powerful methods to characterize these devices. This project will give students an opportunity to perform research on emerging electronic materials. Aspiring researchers will learn semiconductor science, acquire modern research skills and prepare for careers in science and technology.Technical:Novel electronic devices based on emergent highly crystalline organic semiconductors and perovskite materials are under intense research for their potential use in the next-generation optoelectronic applications. The main focus of this project is to significantly advance the fundamental understanding of operating principles and microscopic mechanisms governing the behavior of organic field-effect transistors and perovskite photo-conductors. The research team plans to achieve this by employing a unique and powerful combination of high-resolution ac-Hall effect measurements, an in-situ application of calibrated uniaxial mechanical strains, variable temperature and/or photoexcitation, as well as using complementary theoretical modeling in order to understand the intrinsic (trap-free) charge carrier mobilities, electron-hole recombination rates, carrier lifetimes and diffusion lengths in these devices. Implementation of the project is expected to result in the development of high-performance, flexible organic field-effect transistors based ultra-thin organic crystals and optimized perovskite photo-conductors with chemically passivated surfaces, lead to new methodologies of high-precision Hall effect measurements, especially important for emergent ?soft? and flexible electronics, and more broadly contribute to a better understanding of the electronic, photonic and magneto-transport properties of novel semiconductor devices. The interdisciplinary nature of this project provides excellent educational, human resource and outreach opportunities in the area of optoelectronics and semiconductor device engineering.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.