EXPLORING QUANTUM WELLS IN OLED TECHNOLOGIES: A COMPREHENSIVE REVIEW OF APPLICATIONS AND ADVANCEMENTS

Efficient organic light-emitting diodes (OLEDs) with structurally integrated quantum wells are attracting considerable attention due to their ability to obtain narrow spectral radiation and high radiation efficiency. In particular, there is a tendency to enhance efficiency in such light-emitting devices due to the inclusion in their architecture of phosphorescent metal-organic complexes and materials with an inherent mechanism of thermally activated delayed fluorescence. Due to strong spin-orbit interaction, this approach transforms non-radiating triplet excitons into radiating singlet excitons. In this review, we mainly discuss the mechanisms of electrogenerated exciton localization in potential wells to preserve OLED efficiency with increased emission brightness and reduced exciton leakage channels, report on quantum wells design strategies for OLEDs exhibiting blue, green, red, infrared, and white highly efficient radiation, and provide information on the practical application of quantum well technology in various organic electronics devices. By analyzing recent developments and challenges, this comprehensive review provides insights into the potential of quantum wells to revolutionize OLED innovation and future trends.