Abstract
Based on the photoswitchable characteristic of spirooxazines controlled by photochromic reactions, spiro[2H-indole-2,3'-[3H] phenanthr[9,10b] [1,4] oxazine(SO) as guest was doped to the active host MEH-PPV and the four layers architecture light-emitting diodes (LEDs) was fabricated using ITO as anode, PEDOT: PSS as hole-transport layer, MEH-PPV: SO as emitting layer, LiF and Al as cathode. The electroluminescent properties of LEDs was investigated by exposure to UV and visible light respectively. Through photochromic reaction, the ring-opening coloured of SO acted as traps for injected charge carries which influenced the behavior of LEDs. The electroluminescent characteristics of MEH-PPV diodes including current density, blighting and electroluminescent intensity may be changed through the reversible switchable charge traps of SO driven by light.
| Original language | English |
|---|---|
| Pages (from-to) | 291-296 |
| Number of pages | 6 |
| Journal | Gongneng Cailiao yu Qijian Xuebao/Journal of Functional Materials and Devices |
| Volume | 18 |
| Issue number | 4 |
| Publication status | Published - Aug 2012 |
Keywords
- Electroluminescence, LEDs
- MEH-PPV
- Photo-switching
- Photochromism
- Spirooxazines