Purely Organic Room‐Temperature Phosphorescent Materials for Electrochemiluminescence

ABSTRACT Purely organic room‐temperature phosphorescent (RTP) materials show great potential for enabling highly efficient electrochemiluminescence (ECL). However, current research has predominantly focused on photoluminescence (PL), electroluminescence (EL), mechanoluminescence (ML), and x‐ray radioluminescence (RL), their ECL behavior has not been investigated. In this study, we report a series of purely organic RTP materials (DPy, FPy, and TPy), constructed via a donor–acceptor (D–A) skeleton and heavy atom effect, with TPy demonstrating the highest phosphorescence quantum yield of 75.7%. Importantly, ECL emission from DPy, FPy, and TPy particles is successfully achieved. Mechanistic studies reveal that RTP‐based ECL operates via a dual‐pathway process involving both a low oxidation potential pathway and the annihilation reaction pathway. These findings significantly broaden the applicability of RTP materials, thereby advancing the development of ECL systems.