A rapid in situ synthesis of wide-spectrum CD@BaCl2 phosphors via anti-solvent recrystallization for white LEDs

摘要: The development of solid-state carbon dots with good photoluminescence performance both at room temperature and high is still challenging. Herein, we apply a facile rapid anti-solvent-induced in situ recrystallization where the act as seeds heterogeneous nucleation to encapsulate them into barium chloride crystals. Benefiting from spatial confinement effect chloride, are well separated recrystallized crystals, thereby inhibiting non-radiative electron–electron energy interactions between aggregated dots, presenting wide-spectrum (FWHM = 107 nm) green-emission. Impressively, dot@barium shows excellent thermal stability that 423 K intensity can maintain ∼90% initial temperature, due low electron–electron/electron–phonon transfer chloride. Further, practicability phosphors was demonstrated by series fabricated white light-emitting-diode prototypes, which increment green improved color rendering index prototypes 78.6 89.1. synthesis process favorable features will shed light on further environment-friendly carbon-dot-based composites for various optoelectronic devices.