Characterizing the Electroluminescence Emission from a Strongly Coupled Organic Semiconductor Microcavity LED
Characterizing the Electroluminescence Emission from a Strongly Coupled Organic Semiconductor Microcavity LED
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DOI：
10.1002/adom.201300017
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发表时间：
2013-07-01
影响因子：
9
通讯作者：
Lidzey, David G.
中科院分区：
文献类型：
--
作者：
Christogiannis, Nikolaos;Somaschi, Niccolo;Lidzey, David G.
描述了强耦合有机半导体发光二极管（OLED）的制造。该器件通过角分辨光致发光和电致发光光谱进行表征，并将极化子 OLED 的效率与等效弱耦合器件的效率进行比较。极化子OLED的外发射效率比OLED小约6倍；这种效应归因于激子相对较慢地向下极化子分支底部的状态散射。在脉冲电压激励下测量极化子和标准 OLED 器件的时间响应，发现器件动态受到电荷传输和复合的限制。
The fabrication of a strongly coupled organic semiconductor light emitting diode (OLED) is described. The device is characterised through angle-resolved photoluminescence and electroluminescence spectroscopy, with the efficiency of the polariton OLED being compared to that of an equivalent weakly coupled device. The external emission efficiency of the polariton OLED is approximately 6 times smaller than that of the OLED; an effect that is attributed to the relatively slow scattering of excitons towards states at the bottom of the lower polariton branch. The temporal responses of the polariton and standard OLED devices are measured under pulsed voltage excitation, and device dynamics are found to be limited by charge transport and recombination.