Owing to quantum confinement, low dimensional hybrid perovskite materials have recently shown a great potential for applications in optoelectronics. Such materials can exhibit broad or narrow band light emission and relatively high photoluminescence quantum yields (PLQY). However, the search for efficient phosphors with a specific set of characteristics remains difficult because the family of hybrid metal halides consists in an extremely large chemical system (i.e., different halides, metals, and organic molecules), and optical properties are not predictable prior to synthesis and characterization. In this context, we carried out syntheses and characterizations in a high-throughput manner to discover hybrid metal halides with intense white-light emission for applications in solid state lighting. Simple syntheses were developed including (i) mixing amines in PbX<sub>2</sub> solutions, and (ii) fast crystallization through addition of anti-solvent. With this process, 100 materials were synthesized and preliminary screening of PL properties under UV lamp (λ<sub>exc</sub> = 254 and 365 nm) enabled for the fast identification of compounds with intense photoemissions (Figure). A couple of hybrid metal halides with record PLQYs and high color rendering were characterized in depth (XRD, solid-state NMR, steady-state and time-resolved photoluminescence, ...) to reveal some structural characteristics favoring the broad-band emissions.

Experimental screening for discovery of low dimensional metal halides with intense white-light emission

2019 Fall National Meeting

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.