This paper presents a comprehensive investigation into the optimization of exciplex emission in organic light-emitting diodes (OLEDs). Through a systematic exploration of various combinations of hole-transporting materials (HTMs) and electron-transporting materials (ETMs), we elucidate critical factors influencing exciplex formation and its impact on OLED performance. Our analysis focuses on estimating the energy band gap of exciplexes, guiding the selection of appropriate material combinations. Experimental observations reveal distinct exciplex emission profiles and lifetime characteristics for different HTM/ETM combinations, providing valuable insights into exciplex formation dynamics. Importantly, we emphasize the significance of ensuring that the HTM/ETM combination possesses a higher triplet energy bandgap than the exciplex to optimize OLED performance and enhance energy efficiency. Overall, this study contributes to the advancement of OLED technology by offering effective strategies for achieving efficient exciplex emission, with implications for lighting, displays, and other applications
Tài liệu tham khảo
Chi, J., Chen, L., Qiao, X., Xiao, S., Guo, X., & Ma, D. (2022). Visualizing the exciton formation channel in exciplex-based organic light-emitting diodes. Organic Electronics, 105, 106497. https://doi.org/10.1016/j.orgel.2022.106497
Vipin, C. K., Shukla, A., Rajeev, K., Hasan, M., Lo, S.-C., Namdas, E. B., Ajayaghosh, A., & Unni, K. N. N. (2021). White Organic Light-Emitting Diodes from Single Emissive Layers: Combining Exciplex Emission with Electromer Emission. The Journal of Physical Chemistry C, 125(41), 22809–22816. https://doi.org/10.1021/acs.jpcc.1c06323
Wang, X.-Q., Hu, Y., Yu, Y.-J., Tian, Q.-S., Shen, W.-S., Yang, W.-Y., Jiang, Z.-Q., & Liao, L.-S. (2021). Over 800 nm Emission via Harvesting of Triplet Excitons in Exciplex Organic Light-Emitting Diodes. The Journal of Physical Chemistry Letters, 12(26), 6034–6040. https://doi.org/10.1021/acs.jpclett.1c01609
Ying, S., Xiao, S., Peng, L., Sun, Q., Dai, Y., Qiao, X., Yang, D., Chen, J., & Ma, D. (2022). Exciton Regulation for Organic Light-Emitting Diodes with Improved Efficiency and Roll-Off by Managing the Bipolar Spacer Layers Based on Interfacial Exciplexes. ACS Applied Electronic Materials, 4(6), 3088–3098. https://doi.org/10.1021/acsaelm.2c00483
