Professor of Nanoelectronics, University of Manchester
High Performance Oxide-Based Diodes and Transistors
Jiawei Zhang(1), Yiming Wang(2), Yunpeng Li(2), Jin Yang(2), Josh Wilson(1), Qian Xin(2), Aimin Song(1,2,*) (1) School of Electrical and Electronic Engineering, University of Manchester, Manchester M13 9PL, UK (2) School of Microelectronics and Center of Nanoelectronics, Shandong University, Jinan, China.
Oxide semiconductors have attracted a great deal of interest due to their superior electrical properties compared with conventional thin-film semiconductors, such as high carrier mobility, optical transparency, large-area uniformity and low-processing temperatures. To date, most research on oxide-based devices has focused on material improvements and thin-film transistors, but the effort on diodes is much limited. This is largely because it is difficult to form stable and high-quality Schottky junctions, and oxide semiconductor surfaces and interfaces are very sensitive to process conditions. Like transistor, diode is also a basic building block in most electronic circuits. In many thin-film and/or transparent electronics applications, e.g., radio frequency identification tags, solar cells, amplifiers, and logic gates, high quality Schottky diodes are crucial. Furthermore, Schottky contacts are used in novel transistor structures, such as recently studied oxide-semiconductor-based, metal-semiconductor field-effect transistors. Here, our recent work on high performance oxide-based diodes and transistors is reported. These include very high quality IGZO Schottky diodes with an ideality factor of 1.09, high breakdown voltage, ultra-low noise, and operating speed >20 GHz on glass and 2.45 GHz on flexible substrate. The IGZO-based TFTs also reached a benchmark speed of 1 GHz. These are, to the best of our knowledge, fastest oxide-based diodes and transistors to date. By integrating SnO-based P-type TFTs with IGZO-based n-type TFTs, CMOS-like oxide logic gates and functional circuits are produced, including inverters with a gain up to 150, NAND gate, D-latch, 51 stage ring oscillator and a one-bit full adder, etc.
 Jiawei Zhang, Yunpeng Li, Binglei Zhang, Hanbin Wang, Qian Xin & Aimin Song, Nature Communications 6, 7561 (2015)  Qian Xin, Linlong Yan, Yi Luo, and Aimin Song. Applied Physics Letters. 106: 113506. (2015)  Jiawei Zhang, et al, Applied Physics Letters 107, 093505 (2015)  Jiawei Zhang, et al, IEEE Electron Device Letters, 37, NO. 4, 389, APRIL (2016).  Jiawei Zhang, et al, Applied Physics Letters, 108, 263503 (2016);  Yunpeng Li, et al, Scientific Reports, 6:36183, (2016)  Lulu Du, et al, Applied Physics Letters, 110, 011602 (2017)  Joshua Wilson, et al, Applied Physics Letters, 111, 213503 (2017).  Yunpeng Li, et al, IEEE Electron Device Letters, Volume: 39, Issue: 2, 208 – 211 (2018).  Yiming Wang, et al, IEEE Transactions on Electron Devices, Volume: 65, 1377 (2018).  Jin Yang, et al, IEEE Electron Device Letters, Volume: 39, Issue:4, 516-519, April (2018)  Yunpeng Li, et al, Applied Physics Letters, 112, 182102 (2018).
Professor Aimin Song obtained BSc degree in Physics at Shandong University in 1989, followed by MSc and PhD degrees at the Institute of Semiconductors, Chinese Academy of Sciences in 1992 and 1995. He spent prestigious fellowships at Glasgow University and Munich University from the Royal Society and Alexander von Humboldt foundation. After working at Lund University as a Guest Lecturer, he moved to University of Manchester as a Lecturer in 2002 and was promoted to Professor of Nanoelectronics in 2006. Professor Song has 18 patents and patent applications on novel electronic nano-device concepts, of which 10 have been granted and 3 at PCT stage. Two EU Framework Program projects have been centered on the ultra-fast nanodevice concepts that he developed. The applicability of the new devices in printed flexible electronics has led to formation of a spin out company. He received a Royal Society Brian Mercer Feasibility Award, and was awarded a Distinguished Achievement Medal for “Researcher of the Year” of the University of Manchester in 2007. His research has been published in Physical Review Letters, Nature Communications, NanoLetters, Nanoscale, etc, and contributed 68 invited/plenary talks at international conferences. Professor Song is currently a visiting professor at Shandong University.
The University of Manchester, founded in 1824, has over 40,000 students and 10,000 staff, making it the second largest university in the UK. The university had a consolidated income of £1 billion in 2016–2017. The University of Manchester was ranked 29th in the world and 6th in the UK by QS World University Rankings in 2018. The University has 25 Nobel laureates among its past and present students and staff.