|Title:||New bioinspired hole injection/transport materials for highly efficient solution-processed phosphorescent organic light-emitting diodes||Authors:||Cheng C.-C.
|Keywords:||Conducting polymers;Electro-optical materials;Hole injection/transport layer;Organic light-emitting diodes;Supramolecular assembly||Issue Date:||2015||Journal Volume:||13||Start page/Pages:||1-8||Source:||Nano Energy||Abstract:||
A new concept to supramolecular assembly of existed functional polymers, capable of forming network-like organizational clusters through multiple hydrogen-bonding interactions has been exploited. In this paper, a new adenine-based poly(triphenylamine-carbazole) (PTC-A) has been prepared which exhibits a high self-complementary ability in solution and solid states owing to the formation of adenine-adenine (A-A) pairs by induced hierarchical self-assembly. Comparing with uracil-substituted PTC sample (PTC-U), PTC-A presents a much higher thermal stability, electrochemical stability and solvent-resistance ability due to the formation of the more stable physically cross-linking structure. When the PTC-A is utilized as a hole injection/transport layer in a trilayer OLED device, a remarkable improvement in performance relative to the control PTC and PTC-U under similar experimental conditions has been achieved. Further comparison with a control device using a conventional PEDOT:PSS, the efficiency of the solution-processed phosphorescent PLED device with PTC-A is significantly higher than those of PTC-U and PEDOT:PSS-based devices. Thus, PTC-A represents the next-generation hole injection/transport material for high efficiency LED device and low-cost fabrication process. ? 2015 Elsevier Ltd.
|Appears in Collections:||化學工程學系|
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