Optical Properties of Cd-Alloyed CsPbBr3 Nanorods. Yang Gao, Yanyan Cui, Junzi Li, Yingzhuang Xu, Juguang Hu, Tingchao He.Postsynthesis Transformation of Halide Perovskite Nanocrystals. The Journal of Physical Chemistry C 2022, 126 Stabilization and Fluorescence Enhancement of CsPbX3 (X = Cl, Br, I) Perovskite Nanocrystals with Tungstosilicic Acid. Shuoshuo Zang, Guoqing Xu, Renci Yang, Qinyi Zhu, Hewen Liu.Noncrystalline Hybrid Lead Halides with Liquid-Polymer Characteristics. Hang Gao, Haoxiang Sun, Chongming Liu, Dong Yao, Hao Zhang.Direct Observation of Ultrafast Lattice Distortions during Exciton–Polaron Formation in Lead Halide Perovskite Nanocrystals. Bodnarchuk, Yoav William Windsor, Maksym V. Hélène Seiler, Daniela Zahn, Victoria C.The Journal of Physical Chemistry Letters 2023, 14 Current Understanding of Band-Edge Properties of Halide Perovskites: Urbach Tail, Rashba Splitting, and Exciton Binding Energy. Menglin Li, Peng Huang, Haizheng Zhong. ACS Physical Chemistry Au 2023, Article ASAP. Electron Transfer Dynamics from CsPbBr3 Nanocrystals to Au144 Clusters. Kritiman Marjit, Goutam Ghosh, Srijon Ghosh, Debarati Ghosh, Anusri Medda, Amitava Patra.Confinement and Exciton Binding Energy Effects on Hot Carrier Cooling in Lead Halide Perovskite Nanomaterials. Hopper, Ziyuan Ge, Navendu Mondal, Tong Wang, Rozana Mazlumian, Xijia Zheng, Franziska Krieg, Federico Montanarella, Georgian Nedelcu, Martin Kroll, Miguel Albaladejo Siguan, Jarvist M. This article is cited by 213 publications. Overall, we find that the smallest NCs are understood in the framework of quantum confinement, however for the widely used NCs with edge lengths >7 nm the photophysics of bulk lead halide perovskites are a better point of reference. At high fluence, we find that a hot-phonon bottleneck effect slows carrier cooling, but this appears to be intrinsic to the material, rather than size dependent. Only for the smallest NCs (∼4 nm edge length) are strong quantum confinement effects manifest in TA spectral dynamics focusing toward discrete energy states, enhanced bandgap renormalization energy, and departure from a Boltzmann statistical carrier cooling. For NCs above ∼7 nm edge length, spectral signatures are similar to the bulk material–characterized by state-filling with uncorrelated charges–but discrete new kinetic components emerge at high fluence due to bimolecular recombination occurring in a discrete volume. But can we assume that these materials are in the strong confinement regime? Here, we report an ultrafast transient absorption study of cubic CsPbBr 3 NCs as a function of size, compared with the bulk material. Colloidal nanocrystals (NCs) of lead halide perovskites are considered highly promising materials that combine the exceptional optoelectronic properties of lead halide perovskites with tunability from quantum confinement.
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