title: Growth and Anion Exchange Conversion of CH3NH3PbX3 Nanorod Arrays for Light-Emitting Diodes.
abstract: The nanowire and nanorod morphology offers great advantages for application in a range of optoelectronic devices, but these high-quality nanorod arrays are typically based on high temperature growth techniques. Here, we demonstrate the successful room temperature growth of a hybrid perovskite (CH3NH3PbBr3) nanorod array, and we also introduce a new low temperature anion exchange technique to convert the CH3NH3PbBr3 nanorod array into a CH3NH3PbI3 nanorod array while preserving morphology. We demonstrate the application of both these hybrid perovskite nanorod arrays for LEDs. This work highlights the potential utility of postsynthetic interconversion of hybrid perovskites for nanostructured optoelectronic devices such as LEDs, which enables new strategies for the application of hybrid perovskites.
authors.affiliation: ‡Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.
authors.forename: Andrew Barnabas
authors.initials: AB
authors.lastname: Wong
authors.forename: Minliang
authors.initials: M
authors.lastname: Lai
authors.forename: Samuel Wilson
authors.initials: SW
authors.lastname: Eaton
authors.affiliation: ‡Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.
authors.forename: Yi
authors.initials: Y
authors.lastname: Yu
authors.forename: Elbert
authors.initials: E
authors.lastname: Lin
authors.affiliation: ‡Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.
authors.forename: Letian
authors.initials: L
authors.lastname: Dou
authors.affiliation: ‡Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.
authors.forename: Anthony
authors.initials: A
authors.lastname: Fu
authors.affiliation: ‡Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.|⊥Kavli Energy Nanosciences Institute, Berkeley, California 94720, United States.
authors.forename: Peidong
authors.initials: P
authors.lastname: Yang
keywords: CH3NH3PbBr3; CH3NH3PbI3; Hybrid perovskite nanorod array; anion exchange; nanorod array light-emitting diode; perovskite light-emitting diode