Lulu Yang, Liping Yang. Effect of Energy Level Gradient in Emitting Layer on Blue Organic Light-Emitting Diode[J]. Laser & Optoelectronics Progress, 2020, 57(19): 192304
- Laser & Optoelectronics Progress
- Vol. 57, Issue 19, 192304 (2020)
Fig. 1. Schematic of the EML structures in devices A1--A4 and energy level diagram of materials
Fig. 2. Electro-optical characteristics of devices A1--A4. (a) Curves of luminance and current density changed with voltage; (b) curves of power efficiency and current efficiency changed with current density
Fig. 3. Curves of current efficiency changed with current density in devices A1--A4
Fig. 4. Normalized electroluminescence spectra and CIE coordinates of the devices A1--A4 at the voltage of 8 V. The inset is the image of emitting OLED
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Table 1. Electroluminescence characteristics of devices with different structures
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