Design and Application of Electron-Transporting Organic Materials
Design and Application of Electron-Transporting Organic Materials
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DOI：
10.1126/science.267.5206.1969
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发表时间：
1995-03
期刊：
影响因子：
56.9
通讯作者：
M. Strukelj;F. Papadimitrakopoulos;T. Miller;L. Rothberg
中科院分区：
文献类型：
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作者：
M. Strukelj;F. Papadimitrakopoulos;T. Miller;L. Rothberg
工作寿命是使聚合物发光二极管 (LED) 使用变得复杂的主要问题。报道了一类电子传输（ET）聚合物[聚（丙烯酸芳基酯）和聚（芳基醚）]，其中具有高电子亲和力的部分共价连接到稳定的聚合物主链上。与具有传统ET层的器件相比，用这些材料制备的基于聚对亚苯基亚乙烯基(PPV)的器件的稳定性提高了30倍，并且在一种情况下，工作电压显着降低(10伏对约30伏)。氧化铟锡-PPV-聚合物ET层-铝LED的载流能力也增加了30倍。这些改进导致功率效率提高了近一个数量级。选择具有高玻璃化转变温度的聚合物可以延长器件的使用寿命。
Operating lifetime is the main problem that complicates the use of polymeric light-emitting diodes (LEDs). A class of electron transport (ET) polymers [poly(aryl acrylate) and poly(aryl ether)s] is reported in which moieties with high electron affinities are covalently attached to stable polymer backbones. Devices based on poly(p-phenylenevinylene) (PPV) prepared with these materials exhibited a 30-fold improvement in stability and, in one case, dramatically lower (10 volts versus about 30 volts) operating voltage relative to those having conventional ET layers. The current-carrying capacity of indium tin oxide-PPV-polymeric ET layer-aluminum LEDs was also increased by a factor of 30. These improvements lead to an enhancement in power efficiency of nearly an order of magnitude. Choosing polymers with high glass transition temperatures increases device lifetime.