Arm‐Length‐Controlled CsPbBr 3 Nanocrystals for Tunable Optical and Assembly Behavior
Year: 2026
Type: article
Abstract: ABSTRACT Colloidal cesium lead bromide (CsPbBr 3 ) nanocrystals (NCs) are excellent candidates for various photonic and optoelectronic applications due to their bright and stable green emission. Here, we establish arm length control as a central structural parameter that governs both the optical properties of individual CsPbBr 3 NCs and their self‐assembly behavior. Armed NCs, featuring a cubic core with multiple protruding arms, are synthesized by controlling seed size, concentration, and injection temperature, while arm length is tuned via cesium oleate concentration. Prolonged storage in toluene is shown to lead to a time‐dependent morphological evolution from armed NCs to 26‐faceted rhombicuboctahedra, with short‐armed structures as intermediates. NCs with a longer arm length yield enhanced radiative efficiency, extended photoluminescence (PL) lifetimes, and suppressed blinking, making such NCs suitable for light‐emitting devices and quantum photonic applications. In contrast, short‐armed NCs exhibit faster recombination, stronger PL intermittency, and increased surface accessibility, which are favorable for sensing and high‐speed single‐photon emission. The arm length also governs self‐assembly behavior, hereby opening new possibilities for applications. Armed NCs form densely 3D‐packed assemblies with tunable configurations. This work demonstrates how arm length tuning expands the functional potential of CsPbBr 3 NCs by linking morphological control to both optical response and self‐assembly characteristics.
Source: Advanced Materials
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $6,070
Awards: Single crystal PErovskite Charge Transport Engineering for high-performance Radiation detection (SPECTER), Revealing the atomic structure of three-dimensional nanoporous energy materials with electron tomography and in situ electron microscop., G2552619156, G3056984490, G3093570801, Boosting properties and stability of metal halide nanocrystals and derived heterostructures by innovative transmission electron microscopy., From 2D Projections to Precise 3D Atomic Insights of Perovskite Nanocrystals through Synergistic Quantitative Transmission Electron Microscopy and Molecular Modeling., Controllable Synthesis of Conducting Polymer/High-Entropy Perovskite Composites with "Quasi-gas-solid" Interfaces for Electrocatalytic Nitrogen Fixation and Reduction, G4113183243, G4209553546, G5229914382, A Novel Microscopy-based In-Operando Structure-Function-Performance Characterization Tool for Perovskite-derived Optoelectronic Devices (PEROVSKOPE), G632708720, Chemical engineering of interfaces for tailored opto-electronic properties, G6939305347, G7038413624, G7632245253, Hybrid Perowskites as a material platform for conversion, emission and detection of light, Boosting the stability and optoelectronic performance of perovskite nanocrystals for the design of advanced red-emitting LEDs., G8412477347, G875547867, Single Particle Microscopy & Spectroscopy of Morphology and Size Controlled Perovskite crystals: PEROVSKOPY, Development of doped metal halide perovskite nanocrystal assemblies for improved LEDs.
OpenAlex ID: W7140208028