In:
ChemPlusChem, Wiley, Vol. 85, No. 1 ( 2020-01), p. 240-246
Abstract:
Hybrid perovskites have recently received much attention in optoelectronic applications. However, hybrid perovskites are unstable in a humid environment. Mixed halide perovskites (MHPs) show enhanced stability and band‐gap tunability upon engineering of their halide composition. Here, MHPs are prepared through a solvent‐free mechanochemical synthesis (MCS) route that allows superior control over halide compositions than the solvent synthesis routes (SS). The MCS route eliminates the problem in the preparation of MAPb(I x Br 1− x ) 3 with continuously varying x , while maintaining the material properties and suppressing phase segregation present in SS routes. UV‐vis absorption and X‐ray diffraction patterns confirm the production of the desired pure‐phase MHPs. For MAPb(I x Br 1− x ) 3 (0≤ x ≤1), with increased ratio of halide ( x ), the cubic phase gradually transforms into the tetragonal phase and band‐gap tunability is accomplished. The MCS route for the preparation of MHPs is a very promising and efficient technique for superior control in optoelectronic properties, leading to improved control in fabrication approaches.
Type of Medium:
Online Resource
ISSN:
2192-6506
,
2192-6506
DOI:
10.1002/cplu.201900723
Language:
English
Publisher:
Wiley
Publication Date:
2020
detail.hit.zdb_id:
2646595-4