Room temperature synthesis and characterization of novel lead-free double perovskite nanocrystals with a stable and broadband emission

Tang, Y. ; Gomez, L. ; Van Der Laan, M. ; Timmerman, D. ; Sebastian, V. (Universidad de Zaragoza) ; Huang, C.C. ; Gregorkiewicz, T. ; Schall, P.

Resumen: Low-dimensional and lead-free halide perovskites are of great interest for their wide application potential for optoelectronic applications. We report on the successful synthesis of novel lead-free colloidal Cs3BiBr6 nanocrystals (NCs) with an ultra-small size of ~1.5-3 nm by a room temperature antisolvent process. From crystallographic characterization we show that it is critical to precisely control the ratio of precursors to obtain the pure 3-1-6 phase. The synthesis process is facile and repeatable and results in Cs3BiBr6 NCs that display stable blue emission around 438 nm with a relatively broad linewidth of 92.1 nm. Low-temperature photoluminescence (PL) measurements displayed a red-shift of bandgap with decreasing temperature, which might be attributed to the thermal expansion of the lattice. In addition, the NCs demonstrate high stability at ambient conditions. This journal is

Idioma: Inglés

DOI: 10.1039/d0tc04394j

Año: 2021

Publicado en: JOURNAL OF MATERIALS CHEMISTRY C 9, 1 (2021), 158-163
ISSN: 2050-7526

Factor impacto JCR: 8.067 (2021)

Categ. JCR: PHYSICS, APPLIED rank: 24 / 161 = 0.149 (2021) - Q1 - T1
Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 71 / 345 = 0.206 (2021) - Q1 - T1

Factor impacto CITESCORE: 11.8 - Materials Science (Q1)

Factor impacto SCIMAGO: 1.608 - Materials Chemistry (Q1) - Chemistry (miscellaneous) (Q1)

Tipo y forma: Article (Published version)

Área (Departamento): Área Ingeniería Química (Dpto. Ing.Quím.Tecnol.Med.Amb.)