Li Hong-jian, Qu Shu, Xu Xie-mei, Peng Jing-cui
Institute of Optoelectronic Materials, Hunan University, Changsha 410082, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2002 Jun;22(3):360-2.
Based on the physical processes of carriers transport and recombination, a multi-barriers model for carriers transport and recombination in bilayer organic devices is present. The influences of applied bias and thin films (transport layers) barriers on carriers recombination and its efficiency are calculated and discussed. In bilayer organic devices the charge density inside the sample is controlled by interfacial charge accuulation. Interfacial charge accumulation enhances the field in the cell compartment adjacent to the contact at which minority carrier injected. This gives rise to enhanced minority carriers injection and explains why efficient bilayer organic devices can be fabricated. For appropriate values of anodic and cathodic zone energy barriers, a greater recombination efficiency can be acquired. The theory from this model reasonably explained the experimental phenomens, and it proved that the field can control the carriers recombination regions.
基于载流子传输和复合的物理过程，提出了一种双层有机器件中载流子传输和复合的多势垒模型。计算并讨论了外加偏压和薄膜（传输层）势垒对载流子复合及其效率的影响。在双层有机器件中，样品内部的电荷密度由界面电荷积累控制。界面电荷积累增强了与少数载流子注入接触相邻的电池隔室中的电场。这导致少数载流子注入增强，并解释了为何可以制造出高效的双层有机器件。对于阳极和阴极区能量势垒的适当值，可以获得更高的复合效率。该模型的理论合理地解释了实验现象，并证明了电场可以控制载流子复合区域。
