Qianqian Huang, Wenxu Yin, Bo Gao, Qingsen Zeng, Dong Yao, Hao Zhang, Yinghe Zhao, Weijia Zheng, Jiaqi Zhang, Xuyong Yang, Xiaoyu Zhang, Andrey L Rogach
Quantum-confined CsPbBr3 perovskites are promising blue emitters for ultra-high-definition displays, but their soft lattice caused by highly ionic nature has a limited stability. Here, we endow CsPbBr3 nanoplatelets (NPLs) with atomic crystal-like structural rigidity through proper surface engineering, by using strongly bound N-dodecylbenzene sulfonic acid (DBSA). A stable, rigid crystal structure, as well as uniform, orderly-arranged surface of these NPLs is achieved by optimizing intermediate reaction stage, by switching from molecular clusters to mono-octahedra, while interaction with DBSA resulted in formation of a Csx O monolayer shell capping the NPL surface...
May 11, 2024: Light, Science & Applications