上海科技大学知识管理系统

The exceptional photophysical properties of 3D organic–inorganic lead
halide hybrids (OILHs) endow their significant potential for usage in optoelectronics, which has sparked intense research on novel 3D OILHs and
associated applications. However, constructing new 3D OILHs based on
large organic cations suffers from tough challenges due to the limitation of
the Goldschmidt tolerance factor rule, let alone further explorations of their
practical applications. Herein, a brand-new 3D lead chloride hybrid, (1MPZ)
Pb4Cl10·H2O (1, 1MPZ = 1-methylpiperazine) is reported, featuring a dense
3D lead chloride framework made of the corner-, edge-, and face-shared lead
chloride polyhedra. 1 presents a broadband white light emission with a large
Stokes shift and a nanosecond photoluminescence lifetime, which originates
from radiative recombination of self-trapped excitons (STEs) induced by the
highly distorted structure. Such a reabsorption-free and fast-decayed STEs
emission coupling with the dense 3D architecture further enables 1 with
effective X-ray scintillation with good sensitivity. Impressively, 1 also shows
superior environmental and radiation stability. This study provides a new 3D
OILH with appealing luminescence, not only expanding the 3D OILH family
but also inspiring the exploitation of their optoelectronic applications