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trans-N-(Heterocyclic Carbene) Platinum(II) Acetylide Chromophores as Phosphors for OLED Applications
ACS Applied Electronic Materials ( IF 4.3 ) Pub Date : 2020-03-23 , DOI: 10.1021/acsaelm.0c00064 James D. Bullock 1 , Zhengtao Xu 2 , Silvano Valandro 3 , Muhammad Younus 3 , Jiangeng Xue 2 , Kirk S. Schanze 3
ACS Applied Electronic Materials ( IF 4.3 ) Pub Date : 2020-03-23 , DOI: 10.1021/acsaelm.0c00064 James D. Bullock 1 , Zhengtao Xu 2 , Silvano Valandro 3 , Muhammad Younus 3 , Jiangeng Xue 2 , Kirk S. Schanze 3
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A family of complexes of the type trans-(NHC)2Pt(C≡C–Ar)2 (NHC = N-heterocyclic carbene and Ar = substituted phenyl or 4-pyridyl) exhibits blue or blue-green phosphorescence. The photoluminescence is 10–50-fold more efficient when the materials are in dispersed in a solid poly(methyl methacrylate) glass compared to in THF solution. The phosphorescence quantum efficiencies in PMMA glass range from 0.20–0.65, varying with the structure of the aryl acetylide ligands. Organic light-emitting diodes (OLEDs) were fabricated by thermal evaporation, using bis[2-(diphenylphosphino)phenyl] ether oxide (DPEPO) as the host, and 15% of the trans-(NHC)2Pt(C≡C–Ar)2 complexes as the dopant/emitters. Most of the OLEDs display good performance, with EL spectra that closely match the PL in the PMMA glass. The best performing materials have a peak EQE ranging from 9.6–14.1%, with deep blue spectral profiles (minimum CIE (0.16, 0.13)). Several of the complexes have deep HOMO levels, and they display poor EL performance attributed to inefficient host to emitter hole transfer.
中文翻译：
反式- ñ - （杂环卡宾）铂（II）的乙炔生色团作为荧光粉OLED应用
反式-（NHC）2 Pt（C≡C–Ar）2类型的配合物家族（NHC = N-杂环卡宾，Ar =取代的苯基或4-吡啶基）表现出蓝色或蓝绿色磷光。当材料分散在固态聚（甲基丙烯酸甲酯）玻璃中时，与在THF溶液中相比，光致发光的效率要高10-50倍。PMMA玻璃的磷光量子效率在0.20-0.65之间，随芳基乙炔配体的结构而变化。通过使用双[2-（二苯基膦基）苯基]醚氧化物（DPEPO）作为主体，以及15％的反式-（NHC）2 Pt（C≡C– Ar）2复合物作为掺杂剂/发射极。大多数OLED表现出良好的性能，其EL光谱与PMMA玻璃中的PL非常匹配。性能最好的材料的EQE峰值在9.6-14.1％之间，具有深蓝色光谱图（最低CIE（0.16，0.13））。一些配合物具有很深的HOMO水平，并且显示出较差的EL性能，这归因于从主体到发射极空穴传输效率低下。
更新日期：2020-03-23
中文翻译：
反式- ñ - （杂环卡宾）铂（II）的乙炔生色团作为荧光粉OLED应用
反式-（NHC）2 Pt（C≡C–Ar）2类型的配合物家族（NHC = N-杂环卡宾，Ar =取代的苯基或4-吡啶基）表现出蓝色或蓝绿色磷光。当材料分散在固态聚（甲基丙烯酸甲酯）玻璃中时，与在THF溶液中相比，光致发光的效率要高10-50倍。PMMA玻璃的磷光量子效率在0.20-0.65之间，随芳基乙炔配体的结构而变化。通过使用双[2-（二苯基膦基）苯基]醚氧化物（DPEPO）作为主体，以及15％的反式-（NHC）2 Pt（C≡C– Ar）2复合物作为掺杂剂/发射极。大多数OLED表现出良好的性能，其EL光谱与PMMA玻璃中的PL非常匹配。性能最好的材料的EQE峰值在9.6-14.1％之间，具有深蓝色光谱图（最低CIE（0.16，0.13））。一些配合物具有很深的HOMO水平，并且显示出较差的EL性能，这归因于从主体到发射极空穴传输效率低下。
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