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标题：Highly Efficient Pure-White-Light-Emitting Diodes from a Single Polymer: Polyfluorene with Naphthalimide Moieties
来源：《先进功能材料》2006年16卷1期101-106页
作者：中科院长春应用化学研究所 Guo-Li Tu, Chong-Yu Mei, Quan-Guo Zhou（周全国）, Yan-Xiang Cheng（程延祥）, Yan-Hou Geng（耿延候）, Li-Xiang Wang（王利祥）, Dong-Ge Ma（马东阁）, Xia-Bin Jing（景遐斌）, Fo-Song Wang（王佛松）
Research Fronts: MULTILAYER POLYMER LIGHT-EMITTING DIODES; FIRST SINGLE POLYMER; ACHIEVING HIGH-EFFICIENCY POLYMER WHITE-LIGHT-EMITTING DEVICES; HIGHLY EFFICIENT PURE-WHITE-LIGHT-EMITTING DIODES; WHITE-LIGHT EMISSION
领域：材料科学
摘要：Light-emitting diodes exhibiting efficient pure-white-light electroluminescence have been successfully developed by using a single polymer: polyfluorene derivatives with 1,8-naphthalimide chromophores chemically doped onto the polyfluorene backbones. By adjusting the emission wavelength of the 1,8-naphthalimide components and optimizing the relative content of 1,8-naphthalimide derivatives in the resulting polymers, white-light electroluminescence from a single polymer, as opposed to a polymer blend, has been obtained in a device with a configuration of indium tin oxide/poly(3,4-ethylenedioxythiophene)(50 nm)/polymer(80 nm)/Ca(10 nm)/Al(100 nm). The device exhibits Commission Internationale de l'Eclairage coordinates of (0.32,0.36), a maximum brightness of 11 900 cd m-2, a current efficiency of 3.8 cd A-1, a power efficiency of 2.0 lm W-1, an external quantum efficiency of 1.50 %, and quite stable color coordinates at different driving voltages, even at high luminances of over 5000 cd m-2.
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