Voltage-induced infrared absorption of the light-emitting diode based on MEH-PPV
Voltage-induced infrared absorption of the light-emitting diode based on MEH-PPV
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基于MEH-PPV的发光二极管的电压感应红外吸收
DOI：
10.1016/s0379-6779(00)00822-5
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发表时间：
2001
期刊：
影响因子：
4.4
通讯作者：
T. Ohnishi
中科院分区：
文献类型：
--
作者：
Y. Furukawa;Mitsuru Ishima;T. Noguchi;T. Ohnishi
用傅里叶变换红外光谱仪上的外反射装置原位测量了以聚（2-甲氧基-5-（2′-乙基己氧基）-对苯撑乙烯）为发光材料的发光二极管的红外光谱。用差谱法测量了其电压感生红外吸收光谱。所观察到的频带已被归因于注入的正载流子（极化子）的基础上，由碘掺杂，钠掺杂，和光照射产生的载流子的光谱。正载流子的观察可能与注入的正载流子占优势有关，这降低了发光二极管的电致发光效率。
Infrared spectra of the light-emitting diodes fabricated with poly (2-methoxy-5-(2′-ethylhexyloxy)-p-phenylenevinylene) have been measured in situ with an external reflection apparatus on a Fourier-transform infrared spectrophotometer. Voltage-induced infrared absorption spectra have been measured using the difference-spectrum method. The observed bands have been attributed to injected positive carriers (polarons) on the basis of the spectra of the carriers generated by iodine-doping, Na-doping, and photo-irradiation. The observation of positive carriers is probably related to the predominance of injected positive carriers, which reduces the electroluminescence efficiency of the light-emitting diodes.