title: 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.
authors.forename: Dandan
authors.initials: D
authors.lastname: Zhang
authors.forename: Yiming
authors.initials: Y
authors.lastname: Yang
authors.affiliation: Kavli Energy NanoSciences Institute , Berkeley, California 94720, United States.
authors.forename: Yehonadav
authors.initials: Y
authors.lastname: Bekenstein
authors.forename: Yi
authors.initials: Y
authors.lastname: Yu
authors.forename: Natalie A
authors.initials: NA
authors.lastname: Gibson
authors.forename: Andrew B
authors.initials: AB
authors.lastname: Wong
authors.forename: Samuel W
authors.initials: SW
authors.lastname: Eaton
authors.forename: Nikolay
authors.initials: N
authors.lastname: Kornienko
authors.forename: Qiao
authors.initials: Q
authors.lastname: Kong
authors.forename: Minliang
authors.initials: M
authors.lastname: Lai
authors.affiliation: Kavli Energy NanoSciences Institute , Berkeley, California 94720, United States.
authors.forename: A Paul
authors.initials: AP
authors.lastname: Alivisatos
authors.forename: Stephen R
authors.initials: SR
authors.lastname: Leone
authors.affiliation: Kavli Energy NanoSciences Institute , Berkeley, California 94720, United States.
authors.forename: Peidong
authors.initials: P
authors.lastname: Yang