Separation in the Roles of Carrier Transport and Light Emission in Light-Emitting Organic Transistors with a Bilayer Configuration
| Autor: | Hidekazu Shimotani, T. Kanagasekaran, Hui Shang, Katsumi Tanigaki |
|---|---|
| Přispěvatelé: | UCL - SST/IMCN/NAPS - Nanoscopic Physics |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
business.industry Bilayer Energy transfer Transistor 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention Organic semiconductor law Singlet fission Optoelectronics General Materials Science Light emission 0210 nano-technology Luminescence business Organic light-emitting transistor |
| Zdroj: | ACS Applied Materials & Interfaces, Vol. 11, no.22, p. 20200-20204 (2019) |
| ISSN: | 1944-8244 |
| Popis: | To develop high-performance organic light-emitting organic field-effect transistors (LE-OFETs), a fundamental problem in organic semiconductors is to compromise light luminescent efficiency for high carrier mobility and vice versa. Therefore, LE-OFETs can avoid this problem by separating the light-emission and carrier-transport functions. Here, a bilayer LE-OFET composed of a tetracene crystal as a carrier transporter (bottom crystal) and a 4-(dicyanomethylene)-2-methyl-6-( p-dimethylaminostyryl)-4 H-pyran (DCM1)-doped tetracene crystal as a light emitter (top crystal) was fabricated. Red light-emission color, which is distinct from the green emission color of tetracene, was detected in the top crystal. Light emission from the top layer was prohibited when an insulating thin film was inserted between the two crystals. These observations indicate that excitons are formed in the bottom crystal and transferred to the top crystal, emitting reddish light. Bilayer LE-OFETs have the advantage of providing both high current density and a bright emission for high-performance light-emitting FETs. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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