TY - JOUR
T1 - Unraveling the Electronic Heterogeneity and Inhomogeneity in Individual Perovskite CsPbBr3Nanowires
AU - Li, Yize Stephanie
AU - Liang, Shuang
AU - Trieu, Tuong
AU - Bautista, Rahayana Ruth
AU - Lin, Zhiqun
N1 - Funding Information:
This work was supported by the National Science Foundation through grants DMR-1904042 and DMR-1903990.
Publisher Copyright:
© 2022 American Chemical Society. All rights reserved.
PY - 2022/4/25
Y1 - 2022/4/25
N2 - Perovskite nanowires (NWs) have attracted significant attention due to their promise in optoelectronic applications. All-inorganic perovskite CsPbBr3NWs with a well-defined morphology were synthesized using a hot-injection approach. Subsequently, the electronic properties of individual CsPbBr3NWs spun onto SiO2/Si substrates were scrutinized by contactless dielectric force microscopy (DFM). Ambipolar, n-type, and p-type responses were identified for different NWs, revealing the electronic heterogeneities of CsPbBr3NWs. Moreover, longitudinal electronic inhomogeneities were uncovered by the distinct DFM responses of different segments along some NWs whose diameters were 10-20 nm. In addition, DFM experiments unveiled transverse electronic inhomogeneities perpendicular to the length direction in some NWs whose diameters were 30-40 nm. This work demonstrates that the DFM technique is a powerful tool to probe the electronic heterogeneity and inhomogeneity in perovskite NWs, which may have implications for the performance of materials and devices built upon them. In principle, our approach reported here could be extended to study the electronic properties of other one-dimensional metal halide perovskites.
AB - Perovskite nanowires (NWs) have attracted significant attention due to their promise in optoelectronic applications. All-inorganic perovskite CsPbBr3NWs with a well-defined morphology were synthesized using a hot-injection approach. Subsequently, the electronic properties of individual CsPbBr3NWs spun onto SiO2/Si substrates were scrutinized by contactless dielectric force microscopy (DFM). Ambipolar, n-type, and p-type responses were identified for different NWs, revealing the electronic heterogeneities of CsPbBr3NWs. Moreover, longitudinal electronic inhomogeneities were uncovered by the distinct DFM responses of different segments along some NWs whose diameters were 10-20 nm. In addition, DFM experiments unveiled transverse electronic inhomogeneities perpendicular to the length direction in some NWs whose diameters were 30-40 nm. This work demonstrates that the DFM technique is a powerful tool to probe the electronic heterogeneity and inhomogeneity in perovskite NWs, which may have implications for the performance of materials and devices built upon them. In principle, our approach reported here could be extended to study the electronic properties of other one-dimensional metal halide perovskites.
KW - dielectric force microscopy
KW - electronic heterogeneity
KW - electronic inhomogeneity
KW - metal halide perovskite
KW - nanowire
UR - http://www.scopus.com/inward/record.url?scp=85128569275&partnerID=8YFLogxK
U2 - 10.1021/acsaem.1c04016
DO - 10.1021/acsaem.1c04016
M3 - Article
AN - SCOPUS:85128569275
SN - 2574-0962
VL - 5
SP - 4431
EP - 4438
JO - ACS Applied Energy Materials
JF - ACS Applied Energy Materials
IS - 4
ER -