Enhanced conductivity of PEDOT: PSS electrode by doping and heat treatment with polar aprotic solvents for ITO-free organic light emitting diodes
| Autor: | Yao-Wen Lin, 林耀文 |
|---|---|
| Rok vydání: | 2015 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 103 In order to obtain an anode with flexibility and high conductivity, lots of groups try to enhance the conductivity of PEDOT:PSS with adding polar solvents─such as glycol, ethanol and using post-treatment by immersing acid and solvents. These results show that, by varying the arrangement and ratio between PEDOT and PSS, those two different ways are all can enhance the conductivity more than three orders. In recent years has been measured and confirmed. In this research, we use the polar aprotic solvents to treat the PEDOT:PSS solution and film by heat treatment and doping. Through optimization of the parameters, we can effectively enhance the conductivity of PEDOT:PSS from 0.3 (S/cm) to 1200 (S/cm) and 700 (S/cm) by an easy, stable, fast and height adaptation method. Four orders of conductivity can be enhanced. The films with different treatment were investigated and compared with each other in the difference of optical conductivity, transmittance, work function, surface roughness, surface morphology, and stability. The films also use XPS and UV-vis absorption to analyze the conductivity enhancement mechanism. When the additive and heat-tratment PEDOT:PSS anode device at the luminance of 1000 cd/m2, the performance of current efficiency are 15.3 (cd / A) and 21.2 (cd / A), power efficiency are 6.3 (lm / W) and 6.7 (lm / W) and EQE are 7.5 (%) and 9.8 (%). |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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