title: Thermally cross-linkable hole transport polymers for solution-based organic light-emitting diodes.
abstract: Two thermally cross-linkable hole transport polymers that contain phenoxazine and triphenylamine moieties, X-P1 and X-P2, are developed for use in solution-processed multi-stack organic light-emitting diodes (OLEDs). Both X-P1 and X-P2 exhibit satisfactory cross-linking and optoelectronic properties. The highest occupied molecular orbital (HOMO) levels of X-P1 and X-P2 are -5.24 and -5.16 eV, respectively. Solution-processed super yellow polymer devices (ITO/X-P1 or X-P2/PDY-132/LiF/Al) with X-P1 or X-P2 hole transport layers of various thicknesses are fabricated with the aim of optimizing the device characteristics. The fabricated multi-stack yellow devices containing the newly synthesized hole transport polymers exhibit satisfactory currents and power efficiencies. The optimized X-P2 device exhibits a device efficiency that is dramatically improved by more than 66% over that of a reference device without an HTL.
authors: Department of Information Display and Advanced Display Research Center, Kyung Hee University, Seoul, 130-701, Republic of Korea.
authors: Seung Ji
authors: SJ
authors: Cha
authors: Se-Na
authors: SN
authors: Cho
authors: Woo-Hyung
authors: WH
authors: Lee
authors: Ha-Seul
authors: HS
authors: Chung
authors: In-Nam
authors: IN
authors: Kang
authors: Min Chul
authors: MC
authors: Suh
mesh_terms: D000814:Aniline Compounds / Q000737:chemistry; D003432:Cross-Linking Reagents / Q000737:chemistry; D004553:Electric Conductivity; D055664:Electrochemical Techniques; D049449:Luminescence; D049408:Luminescent Agents / Q000737:chemistry; D008956:Models, Chemical; D015394:Molecular Structure; D009930:Organic Chemicals / Q000737:chemistry*; D010078:Oxazines / Q000737:chemistry; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry*; D012666:Semiconductors; D012996:Solutions / Q000737:chemistry*; D013696:Temperature
chemical_list: D000814:Aniline Compounds; D003432:Cross-Linking Reagents; D049408:Luminescent Agents; D009930:Organic Chemicals; D010078:Oxazines; D011108:Polymers; D012996:Solutions; C039203:phenoxazine
keywords: conjugated polymers; curing of polymers; heteroatom-containing polymers; light-emitting diodes; spin coating