Advances in Polymer‐Based Organic Room‐Temperature Phosphorescence Materials

Abstract

Organic room‐temperature phosphorescence (RTP) materials are actively explored as attractive candidates for optoelectronic and bioelectronics applications given their unique long‐lived excited‐state features and inherent merits of low‐cost, appreciable functionality, and good biocompatibility. In recent years, many efforts in molecular design and aggregation modulation are devoted to achiev efficient RTP from organics, among which an emerging strategy focuses on confining chromophores within polymer matrices. Polymers possess intertwined chains making them a good platform to restrain the nonradiative decays and quenching, allowing the triplet excitons to survive a long time enough for emission at room temperature. Progress relating to polymer‐based organic RTP materials is highlighted as a new creative subject in the field. This review outlines recent advancements in polymer‐based organic RTP materials. The fundamental mechanism of organic RTP is first presented. Thereafter, design considerations and strategies to construct polymer‐based organic RTP materials are summarized in detail. Several promising progresses in the proposed use of these RTP materials, such as encryption and anti‐counterfeiting, sensors, and bioimaging are overviewed. Finally, the challenges and future perspectives are discussed to emphasize the directions that deserve focus attention in the field.

Employing racemization strategies to simultaneously enhance the quantum yield, lifetime, and water stability of room-temperature phosphorescent materials

“…Despite these advances, fully understanding the complex photophysics of multiphase solid-state systems remains a formidable challenge. 12,13 The transition from the lowest excited singlet state (S 1 ) to the triplet state (T) and from the triplet excited state (T 1 ) to the ground state (S 0 ) involves intersystem crossing (ISC), a process inherently inhibited by spin restrictions. Moreover, the excited states are susceptible to deactivation through non-radiative vibrational modes and quenching by molecular oxygen, further complicating the achievement of stable, long-lived RTP in aqueous environments at room temperature.…”

Recent Advances in Fluorescent Polymers with Color-Tunable Aggregate Emission

“…This Review endeavors to capture a snapshot of the collective progress made, offering valuable insights into the molecular structural design from the color-tuning vantage point while also igniting curiosity for the untapped possibilities that lie ahead in the realm of advanced polymer-driven multicolor aggregate emission. The primary emphasis of this Review is on polymer systems showing conventional or delayed fluorescence, with only minimal coverage of those with phosphorescence, as comprehensive reviews addressing the latter topic are readily available. − …”

Cucurbit[8]uril-based host–guest complexation enhancing afterglow of a naphthalimide derivative for anti-counterfeiting printing

“…† Polymers with multiple hydrogen bonds have been verified to be rigid enough to sufficiently suppress nonradiative relaxation and promote organic RTP. 45 Therefore, we copolymerized bromophenoxy-substituted naphthalimide with acrylamide to form P1, establishing a synergistic enhancement strategy that combined polymerization and host-guest complexation to achieve amorphous long-lived organic RTP. 46 The solid powders of P1 and its complex with CB [8] were obtained by lyophilization.…”