• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Advanced Functional Materials >Investigating Morphology and Stability of Fac-tris (2-phenylpyridyl)iridium(Ⅲ) Films for OLEDs
【24h】

Investigating Morphology and Stability of Fac-tris (2-phenylpyridyl)iridium(Ⅲ) Films for OLEDs

机译：OLED用Fac-tris（2-苯基吡啶基）铱（Ⅲ）薄膜的形貌和稳定性研究

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Stable film morphology is critical for long-term high performance organic light-emitting diodes (OLEDs). Neutron reflectometry (NR) is used to study the out-of-plane structure of blended thin films and multilayer structures comprising evaporated small molecules. It is found that as-prepared blended films of fac-tris(2-phenylpyridyl)iridium(lll) @@[lr(ppy)_3] in 4,4'-bis(N-carbazolyl) biphenyl (CBP) are uniformly mixed, but the occurrence of phase separation upon thermal annealing is dependent on the blend ratio. Films comprised of the ratio of 6 wt% of lr(ppy)_3 in CBP typically used in OLEDs are found to phase separate with moderate heating while a higher weight percent mixture (12 wt%) is found to be stable. Furthermore, it is found that thermal annealing of a multilayer film comprised of typical layers found in efficient devices ( @@[tris(4-carbazoyl-9-ylphenyl)amine (TCTA)/lr(ppy)_3:CBP/bathocu-proine (BCP)]) causes the BCP layer to become mixed with the emissive blend layer, whereas the TCTA interface remains unchanged. This significant structural change causes no appreciable difference in the photoluminescence of the stack although such a change would have a dramatic effect on the charge transport through the device, leading to changes in performance. These results demonstrate the effect of thermal stress on the delicate interplay between the chemical composition and morphology of OLED films.
机译：稳定的膜形态对于长期高性能的有机发光二极管（OLED）至关重要。中子反射法（NR）用于研究混合薄膜的平面外结构和包含蒸发的小分子的多层结构。发现在4,4'-双（N-咔唑基）联苯（CBP）中的fac-三（2-苯基吡啶基）铱（III）@ [[lr（ppy）_3]的制备的共混膜均匀混合但是，热退火时相分离的发生取决于混合比。发现由通常在OLED中使用的CBP中的6wt％的lr（ppy）_3的比率组成的膜在适度加热下相分离，而发现较高重量百分比的混合物（12wt％）是稳定的。此外，发现由在有效装置中发现的典型层组成的多层膜的热退火（@@ [三（4-咔唑基-9-基苯基）胺（TCTA）/ lr（ppy）_3：CBP / bathocu-proine （BCP）]）使BCP层与发射混合层混合，而TCTA界面保持不变。尽管这种改变将对通过器件的电荷传输产生显着影响，从而导致性能的改变，但是这种显着的结构改变不会在堆叠的光致发光中产生明显的差异。这些结果证明了热应力对OLED膜的化学组成和形态之间微妙的相互作用的影响。

著录项

  • 来源
    《Advanced Functional Materials》 |2011年第12期|p.2225-2231|共7页
  • 作者

    Arthur R. G. Smith; Jeremy L Ruggles; Hamish Cavaye; Paul E. Shaw; Tamim A. Darwish; Michael James; Ian R. Gentle; Paul L Burn;

  • 作者单位

    Centre for Organic Photonics and Electronics The University of Queensland Brisbane, QLD 4072, Australia;

    School of Chemistry and Molecular Biosciences The University of Queensland, Brisbane, QLD 4072, Australia;

    Centre for Organic Photonics and Electronics The University of Queensland Brisbane, QLD 4072, Australia;

    Centre for Organic Photonics and Electronics The University of Queensland Brisbane, QLD 4072, Australia;

    Bragg Institute Australian Nuclear Science and Technology Organisation Locked Bag 2001, Kirrawee DC, NSW 2232, Australia;

    Bragg Institute Australian Nuclear Science and Technology Organisation Locked Bag 2001, Kirrawee DC, NSW 2232, Australia,School of Chemistry University of New South Wales Sydney, NSW 2052, Australia;

    Centre for Organic Photonics and Electronics The University of Queensland Brisbane, QLD 4072, Australia;

    Centre for Organic Photonics and Electronics The University of Queensland Brisbane, QLD 4072, Australia;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号