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Organic/inorganic heterostructures for enhanced electroluminescence

机译:有机/无机异质结构可增强电致发光

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In this work, organic/inorganic heterostructure electroluminescence devices are fabricated, in which the inorganic layers (ZnO, ZnS) act as the electron transfer layer and the hole blocking layer. Compared to single-organic-layer (MEH-PPV) devices, the heterostructure devices have a significantly enhanced luminous efficiency. The influences of the electric field and the barrier potential on the improvements in performance are analyzed in detail. The results are: (ⅰ) the introduction of the inorganic layer makes the injection of electrons easier; (ⅱ) the hole current density is enhanced by the increase of the electric field in the organic layer due to a high dielectric constant of the inorganic layer and accumulation of electrons at the inorganic/organic interface; (ⅲ) the electron-hole current density balance is improved.
机译:在这项工作中,制造了有机/无机异质结构电致发光器件,其中无机层(ZnO,ZnS)充当电子传输层和空穴阻挡层。与单有机层(MEH-PPV)器件相比,异质结构器件具有显着增强的发光效率。详细分析了电场和势垒势对性能改善的影响。结果是:(ⅰ)引入无机层使电子注入更加容易; (ⅱ)由于无机层的高介电常数和在无机/有机界面上的电子的积累,通过增加有机层中的电场来提高空穴电流密度; (ⅲ)改善了电子空穴电流密度的平衡。

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