The use of a perylenediimide derivative as a dopant in hole transport layer of an organic light emitting device

Abstract: A perylene diimide (PDI) derivative was used as a dopant in the hole transport layer (HTL) of an organic light emitting device. The HTL examined was poly (N-vinylcarbazole) (PVK) and the PDI used was N,N′-di-dodecylperylene-3,4,9,10-bis-(dicarboximide), (N-DODEPER). The structure of the device was ITO/PEDOT:PSS (70nm)/PVK:N-DODEPER(0, 0.2, 0.4, 0.8wt.%) (65nm)/Alq3 (35nm)/LiF (1.3nm)/Al (100nm). 0.8wt.% N-DODEPER presence exhibited a luminous efficiency of 7.87cd/A and an external quantum efficiency of 0.78% at 21mA/cm2 and a power efficiency of 3lm/W at 12mA/cm2. The luminous and power efficiency values were significantly enhanced by a factor of 15 with respect to that of undoped device. [Copyright &y& Elsevier]