Emission Spectral Stability Modification of Tandem Organic Light-Emitting Diodes through Controlling Charge-Carrier Migration and Outcoupling Efficiency at Intermediate/Emitting Unit Interface
| Autor: | Dan Zhao, Zining Qin, Junsheng Yu, Wei Huang, Zijun Wang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
General Chemical Engineering chemistry.chemical_element 02 engineering and technology 010402 general chemistry 01 natural sciences Spectral line Article lcsh:Chemistry chemistry.chemical_compound OLED Diode Range (particle radiation) Tandem business.industry General Chemistry 021001 nanoscience & nanotechnology Copper 0104 chemical sciences lcsh:QD1-999 chemistry Phthalocyanine Optoelectronics Charge carrier 0210 nano-technology business |
| Zdroj: | ACS Omega ACS Omega, Vol 3, Iss 3, Pp 3348-3356 (2018) |
| ISSN: | 2470-1343 |
| Popis: | An intermediate unit (IMU) of tandem organic light-emitting diode (TOLED) can affect the emission spectral stability because of the different charge-carrier migration and outcoupling efficiency at intermediate/emitting unit interface. In this work, an IMU consisting of carbon 60 and copper(II) phthalocyanine, inserted between red-emitting unit and blue-emitting unit, were constructed and fabricated. We focus on the effect of the relative location of the red-emitting unit and blue-emitting unit in the device configuration on the emission spectral stability of TOLED. In the color-tunable TOLED, a maximum current efficiency of 20.4 cd/A, along with light-emitting spectra tuning from red emission at (0.63, 0.31) according to Commission Internationale de L'Eclairage coordinates at a bias of 10 V to white emission at (0.34, 0.27) at 22 V, is realized. Meanwhile, in the color-stable TOLED, a maximum current efficiency of 15.5 cd/A and a stable white emission at (0.31, 0.27) in a wide range of biases from 12 to 22 V are also obtained. This work might inspire a promising approach for the fabrication of color-tunable and color-stable OLEDs for both information display and solid-state lighting. |
| Databáze: | OpenAIRE |
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