Direct observation of room-temperature high-level triplet–triplet annihilation process in 1%rubrene-doped OLEDs with a CzDBA sensitizer

• Published in: Applied physics letters Vol. 124; no. 12
• Main Authors: Tang, Xiantong, Pan, Ruiheng, Guan, Xinyi, He, Yanjun, Jiang, Sha, Wang, Yongjie, Zhou, Xianju, Xiong, Zuhong
• Format: Journal Article
• Language: English
• Published: Melville American Institute of Physics 18.03.2024
• Subjects: Channels; Energy transfer; Excitons; Organic light emitting diodes; Room temperature; Temperature dependence

Using the magneto-electroluminescence as a sensitive and fingerprint probing tool, a “hot exciton” channel, named the high-level triplet–triplet annihilation (HL-TTA or T2T2A, T2 + T2 → Sn → S1 → S0 + hv) process from the high-lying triplet (T2) to the lowest singlet states, is observed in 1%rubrene...