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- W2024371372 abstract "We report photophysical and electroluminescence (EL) properties of three novel hyperbranched phenylene vinylenes (HPVs) with benzene as the core, 2,5-dimethyloxyl substituted phenylene vinylene as the connecting unit, and benzene, dimethylaniline or pyridine as the terminal group, respectively. The absorption maxima of the HPVs blue-shift from solution to the films due to their twisted molecular conformation. The emission spectra in the films red-shift compared to those in solution, which may originate from interchain excimer species. The thin films of the HPVs exhibit pretty high photoluminescence (PL) quantum yields around 50.5–87.8%. Blue–green light-emitting electrochemical cells (LECs) based on the HPVs have been demonstrated with turn-on voltages of 2.5–2.6 V. The ac impedance measurements indicate the operation of the LECs corresponds to an electrochemical doping model." @default.
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- W2024371372 date "2003-09-01" @default.
- W2024371372 modified "2023-10-16" @default.
- W2024371372 title "Photo- and electroluminescence from hyperbranched phenylene vinylenes" @default.
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- W2024371372 doi "https://doi.org/10.1016/s0379-6779(03)00203-0" @default.
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