New Phthalic Anhydride‐Based Room‐Temperature Phosphorescence Emitter with Lifetime Longer Than One Second. Issue 3 (29th November 2022)

• Record Type: Journal Article
• Authors: Yin, Zheng; Sun, Qi; Chen, Liangliang; Du, Mingxu; Huang, Yan‐Ying; Peng, Qian; Zhang, Guanxin; Zhang, Deqing
• Is Part Of: Advanced optical materials. Volume 11:Issue 3(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-11-29
• Subjects: intermolecular interactions -- intersystem crossing -- phthalic anhydride -- reorganization energy -- room temperature phosphorescence; Optical materials -- Periodicals; Photonics -- Periodicals; 620.11295
• DOI: 10.1002/adom.202202224
• Languages: English
• ISSNs: 2195-1071

Abstract

Abstract: Organic room‐temperature phosphorescence (RTP) materials have attracted much attention in recent years due to their potential applications. However, the development of organic RTP emitters with a long lifetime and high quantum yield remains a great challenge owing to the weak molecular spin–orbit coupling and high sensitivity to oxygen. In this paper, a new purely organic RTP emitter, 3, 3″, 4, 4″‐diphenylsulfonetetracarboxylic dianhydride (DPS), is reported which shows an excitingly ultralong lifetime up to 1.08 s and high phosphorescence quantum yield of 8%. When anhydride units in DPS are transformed into imides, the RTP performance in terms of lifetime and quantum yield is decreased. The presence of multiple intermolecular interactions is favorable for the restriction of nonradiative decay and the promotion of spin–orbit coupling, which is further corroborated by theoretical calculations. The studies demonstrate that DPS is a promising structural motif for developing high‐performance organic RTP emitters. Abstract : A new room‐temperature phosphorescence (RTP) emitter, 3, 3′, 4, 4′‐diphenylsulfonetetracarboxylic dianhydride (DPS), with phosphorescence lifetime and quantum yield of 1.08 s and 7.99%, respectively, is reported. The studies show that DPS is a promising structural motif for developing single‐component high‐performance organic RTP emitters.