Stress-induced CsPbBr3 nanocrystallization on glass surface: Unexpected mechanoluminescence and applications
perovskite nanocrystals, CsPbBr3, mechanoluminescence, glass ceramics, nanocrystallization
In this work, we discovered an unexpected mechanoluminescence (ML) phenomena occurring when transforming amorphous into crystalline, due to the stress-induced precipitation of CsPbBr3 perovskite nanocrystals on glass surface. It is revealed that, unlike the conventional thermal-induced phase transformation mechanism, the breakage of bonding of glass network provides the energy for nucleation and growth, and the shear stress avoids the long-range migration of structural units for crystallization. Such unique ML phenomenon enables the visualization of dynamical force that is inaccessible by common strategy, and so, opens up some novel applications, such as the pressuresensitive “glassy pencil” to learn people’s writing habits, and the Pb2+-detection with good sensitivity and selectivity. These findings not only demonstrate an effective route for the preparation of perovskite materials in a green, time-saving, low cost, and scalable way, enrich the knowledge of glass crystallization mechanism, but also exploit a useful avenue to quantitatively visualize the dynamical force.
Tsinghua University Press
Xiaoqiang Xiang,Hang Lin,Renfu Li,Yao Cheng,Qingming Huang,Ju Xu,Congyong Wang,Xueyuan Chen,Yuansheng Wang, Stress-induced CsPbBr3 nanocrystallization on glass surface: Unexpected mechanoluminescence and applications. NanoRes.2019, 12(5): 1049–1054