Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1664073 | Thin Solid Films | 2016 | 25 Pages |
Abstract
Most small molecule organic light emitting diode (SM-OLED) device structures are made in one layer using solution-based processing because the solution is usually a high dissolvent material that easily attacks the layer below it. We demonstrate a simple and reliable stamping technique for fabricating multi-solution process flexible white SM-OLEDs. The structure is anode/spin-hole injection layer/spin-emitting layer/stamping-electron transport layer/cathode. Poly(di-methyl silane) (PDMS) stamp is used for transferring electron transport layer. An intermediate ultraviolet-ozone surface treatment is introduced to temporarily modify the PDMS stamp surface. Then, the solution-based electron transport layer film can therefore be uniformly formed on top of the PDMS surface. After that the electron transport layer film on the PDMS stamp is transfer-printed onto the emitting layer with suitable heating and pressing. A solution-based processing is successfully established to efficiently fabricate flexible white SM-OLEDs. The SM-OLEDs were obtained at the current density of 20Â mA/cm2, luminance of 1062Â cd/m2, current efficiency of 5.57Â cd/A, and Commission internationale de l'éclairage coordinate of (0.32, 0.35).
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
Yu-Sheng Tsai, Apisit Chittawanij, Lin-Ann Hong, Siou-Wei Guo, Ching-Chiun Wang, Fuh-Shyang Juang, Shih-Hsiang Lai, Yang-Ching Lin,