一种新型平板彩色显示器件的制备和光谱分析

以MEH-PPV(聚2-甲氧基-5-(2′-乙基己氧基-对苯乙烯)])和Alq₃作为发光层, 成功制备出ITO/SiO₂/MEH-PPV/SiO₂/Al结构和ITO/SiO₂/Alq₃ /SiO₂/Al结构的固态阴极射线器件。通过分析SSCL光谱，认为这些高速电子激发有机材料后形成Frenkel激子。当器件两个电极之间加的电压比较低时，有机薄膜层的场强也比较低，这些激子被解离的概率很小，从而产生的是激子发光的长波发射;当器件两个电极之间加的电压比较高时，有机薄膜层的场强很高, 在有机层形成的激子大部分被解离, 解离后的电子直接跃迁至LUMO(lowest unoccupancied molecular orbit)，这些电子弛豫后从LUMO能级到HOMO(highest occupancied molecular orbit )能级直接辐射跃迁, 接着重新复合发光，从而产生短波发射。制作的固态阴极射线器件可以实现全色发光, 提高发光效率和加强蓝光发射。作者可以预期所研制出的这种SSCL器件必将引发平板显示领域一场新的革命性变革。

Fabrication and Spectral Analysis of a Novel Panel Full Color Device

It is demonstrated that a new solid-state cathodoluminescence device based on accelerated electron in SiO_2 can be fabricated using organic light emitting materials as a fluorescent film.This device(the device of sandwiched structure) is composed of a glass substrate,an ITO layer,a double SiO_2 films,and an organic fluorescent film.When a bias voltage is applied to the(devices),they can uniformly emit red,green,and blue light.To some extent,when the voltage is low,the red(green) emission is obtained;and when the voltage is high,the blue emission is acquired.These emissions belong to the solid-state cathodoluminescence,they originate from the accelerated electrons in SiO_2,which bombard the organic layers.Their devices have achieved full color(RGB) lighting and improved blue emitting.