Excitation-dependent correlated color temperature manipulation of white-light emission in Sb3+-doped PMA2ZrCl6 single crystals.

Zero-dimensional (0D) organic-inorganic metal halides (OIMHs), which combine the emissions from organics and self-trapped exciton (STE) of metal halides, have been highly anticipated as a new kind of white light-emitting material for a variety of applications. However, the correlated color temperature (CCT) of the white light-emitting OIMHs is generally not tunable, which severely limits their potential applications in diverse scenarios. Herein, a new class of OIMH based on PMA 2 ZrCl 6 is developed as a white light-emitting material that exhibits broad emissions from 400 nm to 720 nm under 370 nm excitation with the Commission Internationale de l'Eclairage (CIE) color coordinate of (0.30, 0.34). By doping with Sb3+ in PMA 2 ZrCl 6 , excitation-dependent CCT manipulation can be achieved through the combination of the tunable emission of benzylamine (PMA) and STE induced by Sb3+ doping. Upon excitation from 270 nm to 390 nm, CCT values can be tuned from 9179 K to 3107 K, covering warm white light, cool white light, and standard white light. Furthermore, we employed the PMA 2 ZrCl 6 :Sb3+ phosphors as excellent luminescence converters for white light-emitting diodes, wherein CCT values with 5915 K and 7198 K were achieved upon excitation with 310 nm and 365 nm chips, respectively. This research establishes the groundwork for controlling CCT in OIMHs and highlights their great potential in various optoelectronic applications. • A new class of 0D organic-inorganic metal halides based on PMA 2 ZrCl 6 exhibiting white-light emission is developed. • Excitation-dependent CCT manipulation of white-light emission is achieved in Sb3+-doped PMA 2 ZrCl 6. • WLEDs with tunable CCT and high CRI values are fabricated by coating PMA 2 ZrCl 6 :Sb3+ on different commercial chips. [ABSTRACT FROM AUTHOR]