Electroluminescence in organic single-layer light-emitting diodes at high fields  

作　　者：杨盛谊 徐征 王振家 侯延冰 徐叙瑢 张希清 

出　　处：《Science in China(Series F)》2001年第3期168-175,共8页中国科学（F辑英文版）

基　　金：This work was financed by the National Natural Science Foundation of China (Grant Nos. 29992530 and 19974002) ; the Paper Foundation of Northern Jiaotong University.

摘　　要：By considering the interaction between Fowler-Nordheim tunneling injection theory and charge carriers transporting through the bulk, an electroluminescence model for organic single-layer diodes is presented. The expressions of the recombination current density, recombination efficiency and conductivity of the diodes are provided, which elucidate the controlling role of the electric field on mobility and recombination zone. The equilibrium of two opposite charge carriers injection and the cen-tral position of recombination zone are two important preconditions for reducing the leakage current. Space-charge-limited current occurs only over a certain high bias, meanwhile, the quantity of injection carriers increases over the transport capacity of the bulk.By considering the interaction between Fowler-Nordheim tunneling injection theory and charge carriers transporting through the bulk, an electroluminescence model for organic single-layer diodes is presented. The expressions of the recombination current density, recombination efficiency and conductivity of the diodes are provided, which elucidate the controlling role of the electric field on mobility and recombination zone. The equilibrium of two opposite charge carriers injection and the cen-tral position of recombination zone are two important preconditions for reducing the leakage current. Space-charge-limited current occurs only over a certain high bias, meanwhile, the quantity of injection carriers increases over the transport capacity of the bulk.

关 键 词：organic electrolununescence single-layer devices interface barrier space-charge-limited current. 

分 类 号：TN312.8[电子电信—物理电子学]