Zhang, Jingyi published the artcileLow-temperature cross-linkable hole transporting materials through chemical doping for solution-processed green PHOLEDs, Recommanded Product: Pentaerythritol tetra(3-mercaptopropionate), the main research area is crosslinkable hole transporting material surface morphol external quantum efficiency.
Since the inter-layer mutual solubility is an obstacle to the development of solution-processed OLED, crosslinking is considered to be the best method to obtain solvent resistance. Vinyl is the most widely reported crosslinking group, but a problem raised that crosslinking usually need a high temperature Here, two vinyl-crosslinked hole transporting materials, 3,3â?(1,3,4-oxadiazole-2,5-diyl)bis (N-phenyl-N-(4-vinylphenyl)aniline) (OXZ-VPAN), 3,3â?(4-phenyl-4H-1,2,4-triazole-3,5-diyl)bis (N-phenyl-N-(4-vinylphenyl)aniline) (TRZ-VPAN) were designed and synthesized. The introduction of pentaerythritol tetra(3-mercaptopropionate) (PETMP) and vinyl groups by thiol-ene reaction to reduce the crosslinking temperature As a result, crosslinking can be achieved at 120 °C with the solvent resistance higher than 99%. The surface morphol. of the films before and after crosslinking were characterized by at. force microscope, and it was found that the roughness of the film was improved after dopped with PETMP. The solution-processed green phosphorescent OLEDs devices based on the obtained HTM exhibit excellent performance. Maximum current efficiency of 57.1 cd A-1 and external quantum efficiency of 16.0% (Ir (mppy)3) are obtained when OXZ-VPAN served as HTL. This low temperature feasible crosslinking process to prepare HTLs promotes the development solution-processed OLEDs.
Organic Electronics published new progress about Crosslinking. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Recommanded Product: Pentaerythritol tetra(3-mercaptopropionate).
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