Investigation of transparent inverted OLEDs with bilateral emission using Li-doped BCP as electron injection layer

Transparent Inverted Organic Light-Emitting Diodes (IOLEDs) are a promising research area with unique characteristics and vast applications. They seamlessly integrate with n-type thin-film transistors, drawing significant research interest. IOLEDs stand out for their bidirectional light emission, distinct from traditional OLEDs. This bidirectional capability holds promise for transparent displays and lighting, ideal for innovation and high transparency. This study spotlights high-efficiency green phosphorescent transparent IOLEDs, featuring Li-doped BCP as the electron injection layer. Impressive performance metrics include a top-emission turn-on voltage of 4V, a maximum brightness of 11595 cd/m², and peak external quantum efficiency of 4.74%. A transparent top electrode structure (MoO₃/Ag(16nm)/HATCN) achieves exceptional 79.8% transmittance, enhancing transparency and hole-blocking for efficient light emission. In summary, Transparent Inverted Organic Light-Emitting Diodes (IOLEDs) lead optoelectronic research. Bidirectional emission, Lidoped BCP electron injection, and transparent electrodes (MoO₃/Ag/HATCN) offer innovation in transparent displays and lighting. Research enriches our understanding of organic light-emitting materials, promising future applications.