Synthesis of Composition Tunable and Highly Luminescent Cesium Lead Halide Nanowires through Anion-Exchange Reactions.

Abstract

Here, we demonstrate the successful synthesis of brightly emitting colloidal cesium lead halide (CsPbX3, X = Cl, Br, I) nanowires (NWs) with uniform diameters and tunable compositions. By using highly monodisperse CsPbBr3 NWs as templates, the NW composition can be independently controlled through anion-exchange reactions. CsPbX3 alloy NWs with a wide range of alloy compositions can be achieved with well-preserved morphology and crystal structure. The NWs are highly luminescent with photoluminescence quantum yields (PLQY) ranging from 20% to 80%. The bright photoluminescence can be tuned over nearly the entire visible spectrum. The high PLQYs together with charge transport measurements exemplify the efficient alloying of the anionic sublattice in a one-dimensional CsPbX3 system. The wires increased functionality in the form of fast photoresponse rates and the low defect density suggest CsPbX3 NWs as prospective materials for optoelectronic applications.

DOI: 10.1021/jacs.6b03134

Cite this paper

@article{Zhang2016SynthesisOC, title={Synthesis of Composition Tunable and Highly Luminescent Cesium Lead Halide Nanowires through Anion-Exchange Reactions.}, author={Dandan Zhang and Yiming Yang and Yehonadav Bekenstein and Yi Yu and Natalie A Gibson and Andrew Barnabas Wong and Samuel Wilson Eaton and Nikolay Kornienko and Qiao Kong and Minliang Lai and A Paul Alivisatos and Stephen R Leone and Peidong Yang}, journal={Journal of the American Chemical Society}, year={2016}, volume={138 23}, pages={7236-9} }