Enhanced organic light emitting diode and solar cell performances using silver nano-clusters
Enhanced organic light emitting diode and solar cell performances using silver nano-clusters
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DOI：
10.1016/j.orgel.2012.04.027
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发表时间：
2012-09
影响因子：
3.2
通讯作者：
Feng Liu;J. Nunzi
中科院分区：
文献类型：
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作者：
Feng Liu;J. Nunzi
通过热蒸发的方式将银纳米簇（NC）融入有机发光二极管（OLED）和太阳能电池中。银纳米颗粒可在定制的器件架构下提高 OLED 和聚合物太阳能电池的效率。在三（8-羟基喹啉）铝（Alq3）基小分子 OLED 中，银 NC 沉积在铝阴极下方。由于银NCs诱导的避雷针效应，显着促进了从阴极到有机层的电子注入，Alq3OLEDs的发光效率提高了6倍。在聚(3-己基噻吩)(P3HT)聚合物太阳能电池中，银NCs的存在增强了活性层的吸收，这可归因于NCs诱导的光散射效应以及等离子体激元 增强局部电场效应。结果，太阳能电池的光电流增加，功率转换效率（PCE）提高达20%。对不同有机光电器件中表面等离子体激元效应的比较研究揭示了表面等离子体激元的有趣特征，并允许从新的角度优化光电器件。
Silver nano-clusters (NCs) were incorporated into organic light emitting diodes (OLED) and solar cells by means of thermal evaporation. Silver NCs enhance the efficiency of both OLEDs and polymer solar cells under tailored device architecture. In tris-(8-hydroxyquinoline) aluminum (Alq3) based small molecule OLEDs, silver NCs were deposited under the Al cathode. The electron injection from the cathode to organic layer is promoted significantly owing to silver NCs induced lightning rod effect, the Alq3OLEDs luminous efficiency is increased up to a factor of 6. In poly(3-hexylthiophene) (P3HT) polymer solar cells, the active layer absorption is enhanced in the presence of silver NCs, which can be ascribed to NCs induced light scattering effect as well as to plasmon enhanced local electric field effect. As a result, photocurrent of the solar cells is increased and the power conversion efficiency (PCE) is improved up to 20%. The comparative study of surface plasmon effects in different organic optoelectronic devices reveals interesting features of the surface plasmon and allows optimization of optoelectronic devices from a novel point of view.