Water/alcohol soluble electron injection material containing azacrown ether groups: Synthesis, characterization and application to enhancement of electroluminescence

Chia Shing Wu, Huai An Lu, Chiao Pei Chen, Tzung-Fang Guo, Yun Chen

研究成果: Article同行評審

8 引文 斯高帕斯(Scopus)

摘要

Using an environmentally stable metal as the cathode in a polymer light-emitting diode (PLED) is an essential requirement for its practical application. We present the preparation of a water/alcohol soluble copoly(p-phenylene) (P1) containing pendant azacrown ether and ethylene glycol ether groups as a highly efficient electron injection layer (EIL) for PLEDs, allowing the use of environmentally stable aluminum as the cathode. Multilayer PLEDs [ITO/PEDOT:PSS/PF-Green-B/EIL/Al] using P1 as EIL exhibit significantly enhanced device performance, particularly in the presence of K 2CO3 or Cs2CO3. The maximum luminous power efficiency and maximum luminance of the device with Cs2CO 3-doped P1 as EIL were enhanced to 9.16 lm W-1 and 17050 cd m-2, respectively, compared with those without EIL (0.16 lm W -1, 890 cd m-2). The turn-on voltage was also significantly reduced from 5.7 V to 3.7 V simultaneously. The performance enhancement has been attributed to improved electron injection which has been confirmed by the rise in open-circuit voltage (Voc) obtained from photovoltaic measurements. The incorporation of such an electron injection layer significantly enhances device performance for PLEDs with an environmentally stable metal as the cathode.

原文English
頁(從 - 到)1430-1439
頁數10
期刊Organic and Biomolecular Chemistry
12
發行號9
DOIs
出版狀態Published - 2014 三月 7

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry

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