Novel accessible scaffold featuring circularly‐polarized room‐temperature phosphorescence (RTP) is attractive but challenging. Herein, we report a new feasibly separable bidibenzo[b,d]furan compound with strong circularly‐polarized RTP when doping into the rigid polymer matrix. The simple silica‐gel column can separate the absolute chiral R‐isomer with excellent chiroptical properties. The experimental data reveal that the treated films exhibit an RTP efficiency of 14.8 %, a largest dissymmetric factor of 0.12, and a longest lifetime of 0.56 s under ambient conditions. It is found that reducing the nonradiative decays boosts the intrinsic circularly‐polarized RTP emission. The impressive results indicate that the locked axial chirality skeleton endows the potential of achieving superior circularly‐polarized emission for the small organic optoelectronic molecules.

Figure 4. Top: Normalized prompt and delayed (1 ms) PL spectra; middle: CPL spectra; bottom: g lum of a) as-prepared and b) treated PVA films with doped (R)-1 (w (R)-1 :w PVA = 1 : 600) at room temperature with 290 nm excitation. Phosphorescent decay curves of c) as-prepared and d) treated PVA films with doped (R)-1 (w (R)-1 :w PVA = 1 : 600) at room temperature with 290 nm excitation. (inset: photographs of films under 254 nm excitation on and off).

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Organische Elektronik. Zikai He et al. berichten in ihrer Zuschrift (e202202977) über die zirkular‐polarisierte Raumtemperatur‐Phosphoreszenz eines Bidibenzo[b,d]furan‐Molekülgerüsts mit fixierter axialer Chiralität.