High-efficiency organic light-emitting diodes of phosphorescent PtAg2 heterotrinuclear acetylide complexes supported by triphosphine
作者： Yi-Peng Li , Xin-Xia Fan , Yue Wu , Xian-Chong Zeng , Jin-Yun Wang
DOI: 10.1039/C7TC00382J
关键词:
摘要: Three PtAg2 heterotrinuclear complexes supported by dpmp [dpmp = bis(diphenylphosphinomethyl)phenylphosphine] were prepared using carbazole-functionalized acetylides with hole-transport character as co-ligands. As established X-ray crystallography, the array dual exhibits a centre-symmetric linear arrangement significant Pt–Ag interaction. They display intense phosphorescence in CH2Cl2 solutions (Φem 56.9–65.3%) and doping films 43.1–71.2%) at room temperature, originating primarily from 3[π(aromatic acetylides) → π*(dpmp)] 3LLCT s/p(PtAg2)] 3LMCT triplet states mixed some cluster centred 3[d s/p] character. Upon 8% blended host materials consisting of TCTA electron-transport OXD-7 light-emitting layers, high-efficiency solution-processed organic diodes achieved 67.4 cd A−1 peak current efficiency 17.4% external quantum efficiency.
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