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在有机场致发光中,能带模型及分子理论从 20世纪就存在尖锐的矛盾。在分层优化方案中,经SiO2加速后的电子能量可以到达 10eV, 这足以激发发光材料发光,将分层优化方案应用到有机场致发光材料中。发现了固态阴极射线发光(SSCL),经过对它的交叉证明、普适性的验证,肯定了固态阴极射线的发光确实是在发光二极管,无机及有机场致发光之外的一种完全新型的电场诱导的发光。SSCL的特征是在它的光谱中出现短波发光峰,实验证明长波发光峰的减弱是由于电场离化效应。研究了这种效应出现的电压阈值并和SSCL的短波峰出现的电压相比,发现短波峰的出现是在激子的电场离化之后,从而找出了电子处于局域态与扩展态的分水岭,解释了在有机场致发光中能带模型和分子理论并不矛盾,只是适用的条件不同。激子的离化是随电场强度而渐进的变化,因此会有一个两种过程并存的范围。
In the field of organic electroluminescence, there are sharp contradictions in the band model and molecular theory from the 20th century. In the hierarchical optimization scheme, the electron energy accelerated by SiO2 can reach 10 eV, which is enough to excite the luminescent material to emit light, and the layered optimization scheme is applied to the organic electroluminescent material. Found solid-state cathode ray luminescence (SSCL), after its cross-proven, universal validation, affirmed the solid-state cathode ray is indeed light-emitting diode, inorganic and organic electroluminescence in addition to a completely new Electric field induced luminescence. The characteristic of SSCL is the appearance of short-wave luminescence peak in its spectrum. Experiments show that the attenuation of long-wavelength luminescence peak is due to the electric field ionization effect. The voltage threshold of this effect was studied and compared with the voltage appearing at the short wave peak of SSCL, it was found that the appearance of short wave peak was after the ionization of the exciton, thus finding a watershed where the electron was localized and extended , Explains that there is no conflict between the band model and the molecular theory in organic electroluminescence, except that the applicable conditions are different. Exciton ionization is gradual changes with the electric field strength, so there will be a two coexistence of the scope of the process.