Journal Article

PUBDB-2019-00272

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Inorganic Ions Assisted the Anisotropic Growth of $\mathrm{CsPbCl_{3}}$ Nanowires with Surface Passivation Effect

Tang, Y. ; Cao, X. ; Honarfar, A. ; Abdellah, M. ; Chen, C. ; Avila, J. ; Asensio, M.-C. ; Hammarström, L. ; Sa, J. ; Canton, S.Extern*XFEL.EU*DESY* ; Zheng, K. ; Pullerits, T. ; Chi, Q. (Corresponding author)

2018
ACS Washington, DC

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Please use a persistent id in citations: doi:10.1021/acsami.8b09113

Abstract: All-inorganic halide perovskite nanowires (NWs) exhibit improved thermal and hydrolysis stability and could thus play a vital role in nanoscale optoelectronics. Among them, blue-light-based devices are extremely limited because of the lack of a facile method to obtain high-purity $\mathrm{CsPbCl_{3}}$ NWs. Herein, we report a direct and facile method for the synthesis of $\mathrm{CsPbCl_{3}}$ NWs assisted by inorganic ions that served both as a morphology controlling agent for the anisotropic growth of nanomaterials and a surface passivation species modulating the surface of nanomaterials. This new approach allows us to obtain high-purity and size-uniform NWs as long as 500 nm in length and 20 nm in diameter with high reproducibility. X-ray photoelectron spectroscopy and ultrafast spectroscopic measurements confirmed that a reduced band gap caused by the surface species of NWs relative to nanocubes (NCs) was achieved at the photon energy of 160 eV because of the hybrid surface passivation contributed by adsorbed inorganic ions. The resulting NWs demonstrate significantly enhanced photoelectrochemical performances, 3.5-fold increase in the photocurrent generation, and notably improved stability compared to their NC counterparts. Our results suggest that the newly designed NWs could be a promising material for the development of nanoscale optoelectronic devices.

Note: © American Chemical Society; Closed Access

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Contributing Institute(s):

1. Attosecond Science and Technology (FS-ATTO)

Research Program(s):

1. 6214 - Nanoscience and Materials for Information Technology (POF3-621) (POF3-621)

Experiment(s):

1. Measurement at external facility

Appears in the scientific report 2018

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Database coverage:
; Clarivate Analytics Master Journal List ; ClosedAccess ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; IF >= 5 ; JCR ; NCBI Molecular Biology Database ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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