Design of Tandem Organic Light Emitting Diode using efficient charge generation layer
| Autor: | Rajesh K. Mehra, Akanksha Jetly |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
02 engineering and technology 010402 general chemistry 01 natural sciences Effective nuclear charge Inorganic Chemistry Pentacene chemistry.chemical_compound PEDOT:PSS OLED Electrical and Electronic Engineering Physical and Theoretical Chemistry Spectroscopy Common emitter Tandem business.industry Organic Chemistry 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials chemistry Optoelectronics 0210 nano-technology business Layer (electronics) Voltage |
| Zdroj: | Optical Materials. 88:304-312 |
| ISSN: | 0925-3467 |
| DOI: | 10.1016/j.optmat.2018.11.051 |
| Popis: | In this work, highly efficient Tandem Organic Light Emitting Diode (OLED) based on planar organic charge generation layer (CGL) of C70/Pentacene is proposed. It is found that the proposed CGL generate charges as well as exhibits organic photovoltaic type behavior. In addition a very thin layer of Al/LiF and PEDOT:PSS is used as electron and hole injection layer respectively to further increase the transport of electrons and holes from CGL to emissive unit. The current efficiency and luminance of red tandem device is found to be 29 cd/A and 29010 cd/m2 at 20 mA/cm2 and 100 mA/cm2 respectively which is 1.855 times 1.856 times greater than that of single emitter device having current efficiency and luminance of 15.63 cd/A and 15630 cd/cm2 at the same current densities Generally, the turn on voltage of Tandem devices is almost double as compared to single unit device. But with the proposed CGL the turn on voltage of red tandem device is found to be 5.9 V which is less than double the turn on voltage of single unit device (3 V). Therefore, the effective charge generation and transport property of proposed CGL as well as remarkable high injection property of thin Al layer and PEDOT:PSS leads to the enhancement in the efficiency of tandem OLED. |
| Databáze: | OpenAIRE |
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