標題: Highly efficient exciplex emission in solid-state light-emitting electrochemical cells based on mixed ionic hole-transport triarylamine and ionic electron-transport 1,3,5-triazine derivatives
作者: Chen, Hsiao-Fan
Liao, Chih-Teng
Su, Hai-Ching
Yeh, Yun-Shiuan
Wong, Ken-Tsung
照明與能源光電研究所
Institute of Lighting and Energy Photonics
公開日期: 2013
摘要: Highly efficient exciplex emission in solid-state light-emitting electrochemical cells (LECs) was achieved by mixing two ionic fluorescent emitters with opposite bipolarity. A triarylamine derivative as a hole-transport material (HTM) and a 1,3,5-triazine derivative as an electron-transport material (ETM) were selected due to their superior carrier mobilities. The ionic character of HTM and ETM was achieved by chemically attaching three pendant methylimidazolium groups as peripheries, rendering them amenable to LEC applications. Strong exciplex green emission can be observed either from photoluminescence in solid states or electroluminescence in LEC devices when HTM and ETM are mixed. By optimizing the mixing ratio, the external quantum efficiency and power efficiency can be achieved up to 3.04% and 10.29 lm W-1, respectively. These results are among the highest reported for fluorescent LECs.
URI: http://hdl.handle.net/11536/22623
http://dx.doi.org/10.1039/c3tc30518j
ISSN: 2050-7526
DOI: 10.1039/c3tc30518j
期刊: JOURNAL OF MATERIALS CHEMISTRY C
Volume: 1
Issue: 31
起始頁: 4647
結束頁: 4654
顯示於類別:期刊論文


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