Abstract
Light-emitting transistors (LETs) have attracted tremendous academic and industrial interest due to their dual functions of electrical switching and light emission in a single device, which can considerably reduce system complexity and manufacturing costs, especially in the area of flat panel and flexible displays as well as lighting and lasers. In recent years, enhanced LET performance has been achieved by introducing multiple-layer heterostructures in the charge-carrying/light-emitting LET channel versus the best-reported performance in single active layer LETs, rendering multi-layer LETs promising candidates for next-generation display technologies. In this review, the fundamental structures and working principles of multi-layer heterostructure LETs are introduced. Next, developments in multi-layer LETs are discussed based on co-planar LETs, non-planar LETs, and vertical LETs including organic, quantum dot, and perovskite light emitters. Finally, this review concludes with a summary and a perspective on the future of this research field.
Original language | English (US) |
---|---|
Article number | 2007661 |
Journal | Small |
Volume | 17 |
Issue number | 13 |
DOIs | |
State | Published - Apr 1 2021 |
Funding
This work was supported financially by the Key-Area Research and Development Program of Guangdong Province (2019B010924003, 2020B010178001), Shenzhen Science and Technology Research Grant (JCYJ20170412150946440, JCYJ20180302153514509, and JCYJ20170818090312652), Shenzhen Engineering Research Center (Shenzhen Development and Reform Commission ([2018]1410)), Natural Science Basic Research Program of Shaanxi (Program No. 2019JLP-11), and NSFC International Exchanges China Programme (Shenzhen-England, 51911530213). Research at Northwestern University was supported financially by the AFOSR (FA9550-18-1-0331), the Northwestern University MRSEC (NSF DMR-1720139), and Flexterra Corp. H.C. thanks the joint-Ph.D. program supported by the China Scholarship Council for a fellowship.
Keywords
- light-emitting transistors
- multi-layer devices
- organic emitters
- perovskites
- quantum dots
ASJC Scopus subject areas
- Biotechnology
- General Chemistry
- Biomaterials
- General Materials Science
- Engineering (miscellaneous)