Nano-alignment in semiconducting polymer films : a path to achieve high current density and brightness in organic light emitting transistors
| Autor: | Ebinazar B. Namdas, Robert Wawrzinek, Jun Li, Mujeeb Ullah Chaudhry, Shih-Chun Lo, Khalid Muhieddine |
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| Rok vydání: | 2018 |
| Předmět: |
Brightness
Materials science business.industry Transistor Heterojunction 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials law.invention law Optoelectronics Field-effect transistor Light emission Electrical and Electronic Engineering 0210 nano-technology business Lasing threshold Biotechnology Diode Common emitter |
| Zdroj: | ACS photonics, 2018, Vol.5(6), pp.2137-2144 [Peer Reviewed Journal] |
| DOI: | 10.1021/acsphotonics.8b00011 |
| Popis: | Organic light emitting field effect transistors (LEFETs) integrate light emission of a diode with logic functions of a transistor into a single device architecture. This integration has the potential to provide simplified displays at low costs and access to injection lasing. However, the charge carrier mobility in LEFETs is a limiting factor in realizing high current densities along with a trade-off between brightness and efficiency. Herein, we present a technique controlling the nanoscale morphology of semiconducting polymers using nanoscale grooved substrates and dip-coating deposition to achieve high current density. We then applied this approach to heterostructure LEFETs and demonstrated brightness exceeding 29000 cd m–2 at an EQE of 0.4% for a yellow emitter and 9600 cd m–2 at an EQE of 0.7% for a blue emitter. These results represent a significant advancement in organic optoelectronics and are an important milestone toward the realization of new applications in displays and electrically pumped lasing. |
| Databáze: | OpenAIRE |
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