期刊
ADVANCED SCIENCE
卷 6, 期 7, 页码 -出版社
WILEY
DOI: 10.1002/advs.201801930
关键词
hydrogen bonds; molecular aggregation; near-infrared emission; organic light-emitting devices; Pt(II) complexes
资金
- National Natural Science Foundation of China [21602170, 21875179, 51803163, 21572176]
- Natural Science Foundation of Shaanxi Province [2016JQ2011]
- China Postdoctoral Science Foundation [2015M580831, 2016M600778]
- Shaanxi Province Postdoctoral Science Foundation [2017BSHYDZZ02, 2017BSHEDZZ03]
- Fundamental Research Funds for the Central Universities [xjj2016061, xjj2017099, cxtd2015003]
Phosphorescent near-infrared (NIR) organic light-emitting devices (OLEDs) have drawn increasing attention for their promising applications in the fields such as photodynamic therapy and night-vision readable displays. Here, three simple phosphorescent Pt(II) complexes are synthesized, and their intermolecular interactions are investigated in crystals and neat films by X-ray single crystal diffraction and grazing-incidence wide-angle X-ray scattering, respectively. The photophysical properties, molecular aggregation (including Pt-Pt interaction), molecular packing orientation, and electron transport ability are all influenced by the strong intermolecular hydrogen bonds. Consequently, the nondoped OLEDs based on tBu-Pt and F-Pt show electroluminescent emissions in NIR region with the highest external quantum efficiencies of 13.9% and 16.7%, respectively.
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