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Localized Surface Plasmon Resonance Absorption Generated by Free Carriers in Zn‐Doped CuGa 1− x Zn x O 2 Nanoplates
Author(s) -
Xu Yingtian,
Wang Guanxin,
Ma Guanghui,
Wu Hongda,
Wang Xiaoyi,
Shi Linlin,
Zhang He,
Jin Liang,
Ma Xiaohui,
Zou Yonggang,
Yin Jingzhi
Publication year - 2019
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201800753
Subject(s) - photoluminescence , materials science , absorption (acoustics) , doping , heterojunction , surface plasmon resonance , absorption spectroscopy , band gap , analytical chemistry (journal) , zinc , nanoparticle , nanotechnology , optoelectronics , chemistry , optics , metallurgy , composite material , physics , chromatography
This study reports the synthesis of Zn‐doped hexagonal CuGaO 2 (CGO) nanoplates (NPs) and CuGa 1− x Zn x O 2 NPs/ZnO nanowires (NWs) array heterostructures through a hydrothermal method. Remarkably, the absorption properties of CuGa 1− x Zn x O 2 NPs show three absorption regions which can be ascribed to the direct bandgap absorption, defect level absorption, and localized surface plasmon resonance (LSPR) absorption. A dramatically increased LSPR absorption peak is induced by Zn‐doped CGO NPs fabricated in high precursor concentration conditions, and the absorption intensity of infrared region is increased by almost 13 times compared with pure CGO NPs. The hole carrier concentration of CuGa 1− x Zn x O 2 NPs is estimated to be about 10 21 cm −3 by the Drude model. Furthermore, the photoluminescence (PL) properties of CuGa 1− x Zn x O 2 NPs/ZnO NWs heterojunctions under different Zn doping ratios have been studied, a further red‐shift appears in PL spectra with increasing Zn doping ratio. Combined with optical properties and facile processing method, these solution‐processed CuGa 1− x Zn x O 2 NPs may offer a scalable and printable material solution for optoelectronic devices and nonlinear optics.