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利用空穴型聚合物材料ＲＯＰＰＶ－１２［聚（十二烷氧基－对苯乙炔）］与电子型有机小分子材料Ａｌｑ３（八羟基喹啉铝）配合制备了有机薄膜异质结发光二极管。发现该异质结器件在ＲＯＰＰＶ－１２的厚度保持为７０ｎｍ、Ａｌｑ３的厚度为２０ｎｍ时，器件的性能最优，且电致发光完全来自ＲＯＰＰＶ－１２；而当Ａｌｑ３的厚度为３２ｎｍ时，发光区域则跨越了ＲＯＰＰＶ－１２与Ａｌｑ３，器件在较低驱动电压下来自ＲＯＰＰＶ－１２的光发射占主导地位，随着电压的升高，Ａｌｑ３的光发射逐渐占据了主导地位。在相同电压下，前一器件的亮度、电流、发光效率都要远高于后一器件。分析了其发光机理。
Organic thin-film heterojunction light-emitting diodes were prepared by the hole-type polymer material ROPPV-12 [poly (dodecyloxy-p-phenylacetylene)] and the electronic small molecular material Alq3 (aluminum octahydroxide). The device was found to have the best performance when the ROPPV-12 thickness was 70 nm and the Alq3 thickness was 20 nm, and the electroluminescence was entirely from ROPPV-12. When the thickness of Alq3 was 32 nm, the light-emitting region It crosses ROPPV-12 and Alq3. The light emission from ROPPV-12 dominates at lower driving voltage. As the voltage increases, the light emission of Alq3 gradually dominates. At the same voltage, the previous device brightness, current, luminous efficiency is much higher than the latter device. The light-emitting mechanism was analyzed.