Solution-processed small molecular electron transport layer for multilayer polymer light-emitting diodes

Zong You Liu, Shin Rong Tseng, Yu Chiang Chao, Chun Yu Chen, Hsin Fei Meng*, Sheng Fu Horng, Yu Hsun Wu, Su Hua Chen


研究成果: 雜誌貢獻期刊論文同行評審

37 引文 斯高帕斯(Scopus)


Solution-processed electron transport layers (ETL) have been fabricated by solution process and applied in multilayer polymer light-emitting diodes with tris[2-(p-tolyl)pyridine]iridium(III) blended in poly(vinylcarbazole) as the emissive layer. Three kinds of small molecular electron transport materials,including 2,2′,2″-(1,3,5-benzinetriyl)-tris(1-phenyl-1-H- benzimidazole) (TPBi), 3-(4-biphenyl)-4-phenyl-5-(4-tert-butylphenyl)-1,2,4- triazole (TAZ), and 4,7-diphenyl-1,10-phenanthroline (BPhen), are tested and dissolved in methanol to form electron transport layers by blade coating. Such electron transport layer provides efficient electron injection and electron transport ability in the devices. The efficiency of the devices with the combination of ETL and LiF/Al cathode reaches 21.5 cd/A at 10 V (4050 cd/m 2). The efficiency of the devices without ETL are 3.5 cd/A (13 V) for LiF/Al cathode and 17 cd/A (7 V) for CsF/Al cathode at 1000 cd/m2. The aggregation of the solution-processed ETL can be controlled by annealing temperature to further optimize the device performance to maximal efficiency of 53 cd/A.

頁(從 - 到)426-430
期刊Synthetic Metals
出版狀態已發佈 - 2011 三月

ASJC Scopus subject areas

  • 電子、光磁材料
  • 凝聚態物理學
  • 材料力學
  • 機械工業
  • 金屬和合金
  • 材料化學


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