Efficient near-infrared emission benefits from slowing down the internal conversion process

• Published in: Chemical science (Cambridge) Vol. 15; no. 15; pp. 5589 - 5595
• Main Authors: Xie, Mingliang, Zhou, Yannan, Zhou, Huayi, Ma, Chengling, Sun, Qikun, Zhang, Shi-Tong, Zhang, Yujian, Yang, Wenjun, Xue, Shanfeng
• Format: Journal Article
• Language: English
• Published: CAMBRIDGE Royal Soc Chemistry 17.04.2024; Royal Society of Chemistry; The Royal Society of Chemistry
• Subjects: Charge materials; Charge transfer; Chemistry; Chemistry, Multidisciplinary; Emitters; Excitons; Internal conversion; Near infrared radiation; Photoluminescence; Physical Sciences; Quantum efficiency; Rigid structures; Science & Technology; LIGHT-EMITTING-DIODES

Organic deep-red (DR) and near-infrared (NIR) emitters with high photoluminescence quantum yield (PLQY) are rare due to the strong non-radiative ( k nr ) decay. Here, we report two DR/NIR emitters with high PLQY, TPANZPyPI and TPANZ3PI . Interestingly, the TPANZPyPI film exhibits 46.5% PLQY at 699 n...