Organic p-n junction (PNJ) composing of PEDOT:PSS(MoO₃)/Bphen:Cs₂CO₃ is introduced as electron injection layer (EIL) in the bottom-emission inverted organic light-emitting diodes (BIOLEDs). The devices with PNJ of PEDOT:PSS/Bphen:Cs₂CO₃ or MoO₃/Bphen:Cs₂CO₃ as EIL achieve maximum current efficiency of 87.3 cd/A and 86.6 cd/A and power efficiency of 69.4 lm/W and 63 lm/W, respectively, which are higher than that79.8 cd/A and 60 lm/W of the device with the n-doping Bphen:Cs₂CO₃ as EIL, and 51% and 55% improvement in the half operational lifetime. The injection of electrons from the interface of PNJ but not directly from the ITO cathode is more effectively comparison with conventional BIOLED with n-doped Bphen:Cs₂CO₃ as EIL. Thus, reducing the charge accumulation between the electrode and the organic electron transport layer (ETL), moreover, the PNJ is able to control the injection equilibrium of the carriers, and improve the efficiency and stability of the device.

将由PEDOT：PSS（MoO ₃）/ Bphen：Cs ₂ CO ₃组成的有机pn结（PNJ）作为电子注入层（EIL）引入到底部发射反向有机发光二极管（BIOLED）中。以PEDOT：PSS / Bphen：Cs ₂ CO ₃或MoO ₃ / Bphen：Cs ₂ CO _3的PNJ作为EIL的器件可实现87.3 cd / A和86.6 cd / A的最大电流效率以及69.4 lm / W的功率效率和63 lm / W，分别高于具有n掺杂Bphen：Cs ₂ CO ₃的器件的79.8 cd / A和60 lm / W作为EIL，在半衰期中的使用率分别提高了51％和55％。与以n掺杂的Bphen：Cs ₂ CO ₃作为EIL的常规BIOLED相比，从PNJ界面而非从ITO阴极直接注入电子更为有效。因此，PNJ能够减少电极与有机电子传输层（ETL）之间的电荷积聚，从而能够控制载流子的注入平衡，并提高器件的效率和稳定性。