Room-temperature phosphorescence (RTP) from metal-free organic molecules has been an area of intense research. Although classical RTP materials has been used for diverse applications, including organic light-emitting diodes (OLEDs) and bioimaging, they are mainly precious-metal complexes of Ir or Pt. 2 Therefore, cost-effective, less-toxic, and sustainable metal-free alternatives are needed. However, intrinsic molecular RTP of metal-free phosphors has not rivaled metal complexes.