完整後設資料紀錄
DC 欄位語言
dc.contributor.authorChen, Hsiao-Fanen_US
dc.contributor.authorLiao, Chih-Tengen_US
dc.contributor.authorKuo, Ming-Chengen_US
dc.contributor.authorYeh, Yun-Shiuanen_US
dc.contributor.authorSu, Hai-Chingen_US
dc.contributor.authorWong, Ken-Tsungen_US
dc.date.accessioned2014-12-08T15:28:14Z-
dc.date.available2014-12-08T15:28:14Z-
dc.date.issued2012-10-01en_US
dc.identifier.issn1566-1199en_US
dc.identifier.urihttp://dx.doi.org/10.1016/j.orgel.2012.05.050en_US
dc.identifier.urihttp://hdl.handle.net/11536/20456-
dc.description.abstractUV light-emitting electrochemical cells (LECs) were, for the first time, achieved by the ionic 2,2'-bifluorene derivative, 1, which was synthesized through covalent tethering of methylimidazolium moieties as pendent groups. LEC devices incorporating ionic bifluorene 1 without (Device I) and with (Device III) the presence of poly(methyl methacrylate) (PMMA) exhibited UV EL emissions centered at 388 and 386 nm with maximum external quantum efficiencies and power efficiencies of 1.06% and 7.44 mW W-1 for Device III and 0.15% and 1.06 mW W-1 for Device I, respectively. Transmission electron microscopy (TEM) images showed that 1 tends to form nanospheres due to amphiphilic nature. The presence of PMMA unified the size of nanospheres which greatly reduced the void area in films, suppressing the current leakage and enhancing the device efficiency. Furthermore, thicker thickness of the emissive layer of LECs increases the distance between carrier recombination zone and electrodes to avoid exciton quenching. Thus, a sevenfold increase in device efficiency was obtained in thicker UV LECs containing PMMA (Device III) as compared to thinner UV LECs based on neat films of 1 (Device I). The EL emissions in the UV region are successfully achieved by LECs based on 1, which are so far the shortest emission wavelength achieved in LECs. (c) 2012 Elsevier B.V. All rights reserved.en_US
dc.language.isoen_USen_US
dc.subjectLight-emitting electrochemical cellsen_US
dc.subjectUltravioleten_US
dc.subjectFluoreneen_US
dc.titleUV light-emitting electrochemical cells based on an ionic 2,2 '-bifluorene derivativeen_US
dc.typeArticleen_US
dc.identifier.doi10.1016/j.orgel.2012.05.050en_US
dc.identifier.journalORGANIC ELECTRONICSen_US
dc.citation.volume13en_US
dc.citation.issue10en_US
dc.citation.spage1765en_US
dc.citation.epage1773en_US
dc.contributor.department照明與能源光電研究所zh_TW
dc.contributor.departmentInstitute of Lighting and Energy Photonicsen_US
dc.identifier.wosnumberWOS:000309591200001-
dc.citation.woscount1-
顯示於類別:期刊論文


文件中的檔案:

  1. 000309591200001.pdf

若為 zip 檔案,請下載檔案解壓縮後,用瀏覽器開啟資料夾中的 index.html 瀏覽全文。