Unmodified small-molecule organic light-emitting diodes by blade coating
| Autor: | Yu Fan Chang, Hsiao-Wen Zan, Mei Rurng Tseng, Chun Yu Chen, Han Cheng Yeh, Hsin-Fei Meng, Hao Wen Chang, Teng-Chih Chao, Heh Lung Huang, Yu Chian Chiu, Sheng-fu Horng, Hao-Wu Lin |
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| Rok vydání: | 2012 |
| Předmět: |
Biphenyl
Materials science chemistry.chemical_element General Chemistry engineering.material Condensed Matter Physics Electronic Optical and Magnetic Materials Vacuum evaporation Biomaterials Organic semiconductor chemistry.chemical_compound Coating Vacuum deposition chemistry Chemical engineering Materials Chemistry engineering OLED Organic chemistry Iridium Electrical and Electronic Engineering Diode |
| Zdroj: | Organic Electronics. 13:2149-2155 |
| ISSN: | 1566-1199 |
| DOI: | 10.1016/j.orgel.2012.05.017 |
| Popis: | Blade coating with substrate heating and hot wind is demonstrated to be a general platform for multi-layer deposition of unmodified small-molecule organic semiconductors. Most unmodified small molecules, originally designed for vacuum evaporation, can be blade coated while the solubility is above 0.5 wt.%. High uniformity is achieved for scale over 5 cm. Orange devices by evaporation and blade coating are compared with 4,4′-bis(carbazol-9-yl)biphenyl (CBP) as the host, iridium(III) bis(4-(4- t -butylphenyl)thieno[3,2- c ]pyridinato- N,C 2 ′)acetylacetonate (PO-01-TB) as the emitter. The efficiency difference is within 10%. When 2,6-bis(3-(9H-carbazol-9-yl)phenyl)pyridine (26DCzPPy) is used as the host, the current efficiencies are 40 cd/A for orange, 32 cd/A for green, and 20 cd/A for blue. The optimized organic light-emitting diodes (OLED) structure developed for vacuum deposition can therefore be exactly copied by the low cost blade coating method in solution. |
| Databáze: | OpenAIRE |
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