|
1
|
Zvereva MV, Zhmurova AV. Synthesis, Structure, and Spectral Properties of ZnTe-Containing Nanocomposites Based on Arabinogalactan. RUSS J GEN CHEM+ 2022. [DOI: 10.1134/s1070363222100139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
|
2
|
Lee YS, Ito T, Shimura K, Watanabe T, Bu HB, Hyeon-Deuk K, Kim D. Coupled electronic states in CdTe quantum dot assemblies fabricated by utilizing chemical bonding between ligands. NANOSCALE 2020; 12:7124-7133. [PMID: 32191241 DOI: 10.1039/d0nr00194e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Semiconductor quantum dot superlattices (QDSLs) have attracted much attention as key materials for realizing new optoelectronic devices such as solar cells with high conversion efficiency and thermoelectric elements with high electrical conductivity. To improve the charge transport properties of QDSL-based optoelectronic devices, it is important that the QD structures form minibands, which are the coupled electronic states between QDs. A shorter inter-QD distance and a periodic arrangement of QDs are the essential conditions for the formation of minibands. In this study, we use CdTe QDs capped with short ligands of N-acetyl-l cysteine (NAC) to fabricate three-dimensional QD assemblies by utilizing chemical bonding between NACs. Absorption spectra clearly display the quantum resonance phenomenon originating from the coupling of the wave functions between the adjacent QDs in CdTe QD assemblies. Furthermore, we demonstrate the formation of minibands in CdTe QD assemblies by examining both, the excitation energy dependence of photoluminescence (PL) spectra and the detection energy dependence of PL excitation spectra. The fabrication method of QD assemblies utilizing chemical bonding between NACs can be applied to all QDs capped with NAC as a ligand.
Collapse
Affiliation(s)
- Yong-Shin Lee
- Department of Applied Physics, Osaka City University, Osaka 558-8585, Japan.
| | | | | | | | | | | | | |
Collapse
|
|
3
|
Nie KY, Tu X, Li J, Chen X, Ren FF, Zhang GG, Kang L, Gu S, Zhang R, Wu P, Zheng Y, Tan HH, Jagadish C, Ye J. Tailored Emission Properties of ZnTe/ZnTe:O/ZnO Core-Shell Nanowires Coupled with an Al Plasmonic Bowtie Antenna Array. ACS NANO 2018; 12:7327-7334. [PMID: 29894159 DOI: 10.1021/acsnano.8b03685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The ability to manipulate light-matter interaction in semiconducting nanostructures is fascinating for implementing functionalities in advanced optoelectronic devices. Here, we report the tailoring of radiative emissions in a ZnTe/ZnTe:O/ZnO core-shell single nanowire coupled with a one-dimensional aluminum bowtie antenna array. The plasmonic antenna enables changes in the excitation and emission processes, leading to an obvious enhancement of near band edge emission (2.2 eV) and subgap excitonic emission (1.7 eV) bound to intermediate band states in a ZnTe/ZnTe:O/ZnO core-shell nanowire as well as surface-enhanced Raman scattering at room temperature. The increase of emission decay rate in the nanowire/antenna system, probed by time-resolved photoluminescence spectroscopy, yields an observable enhancement of quantum efficiency induced by local surface plasmon resonance. Electromagnetic simulations agree well with the experimental observations, revealing a combined effect of enhanced electric near-field intensity and the improvement of quantum efficiency in the ZnTe/ZnTe:O/ZnO nanowire/antenna system. The capability of tailoring light-matter interaction in low-efficient emitters may provide an alternative platform for designing advanced optoelectronic and sensing devices with precisely controlled response.
Collapse
Affiliation(s)
- Kui-Ying Nie
- School of Electronic Science and Engineering , Nanjing University , Nanjing 210093 , China
- School of Physics and Engineering , Xingyi Normal University for Nationalities , Xingyi 562400 , China
| | - Xuecou Tu
- School of Electronic Science and Engineering , Nanjing University , Nanjing 210093 , China
| | - Jing Li
- School of Electronic Science and Engineering , Nanjing University , Nanjing 210093 , China
| | - Xuanhu Chen
- School of Electronic Science and Engineering , Nanjing University , Nanjing 210093 , China
| | - Fang-Fang Ren
- School of Electronic Science and Engineering , Nanjing University , Nanjing 210093 , China
- Department of Electronic Materials Engineering, Research School of Physics and Engineering , The Australian National University , Canberra , ACT 2601 , Australia
- Collaborative Innovation Center of Advanced Microstructures , Nanjing University , Nanjing 210093 , China
| | - Guo-Gang Zhang
- Grünberg Research Centre , Nanjing University of Posts and Telecommunications , Nanjing 210003 , China
| | - Lin Kang
- School of Electronic Science and Engineering , Nanjing University , Nanjing 210093 , China
| | - Shulin Gu
- School of Electronic Science and Engineering , Nanjing University , Nanjing 210093 , China
- Collaborative Innovation Center of Solid-State Lighting and Energy-Saving Electronics , Nanjing University , Nanjing 210093 , China
| | - Rong Zhang
- School of Electronic Science and Engineering , Nanjing University , Nanjing 210093 , China
- Collaborative Innovation Center of Advanced Microstructures , Nanjing University , Nanjing 210093 , China
- Collaborative Innovation Center of Solid-State Lighting and Energy-Saving Electronics , Nanjing University , Nanjing 210093 , China
| | - Peiheng Wu
- School of Electronic Science and Engineering , Nanjing University , Nanjing 210093 , China
| | - Youdou Zheng
- School of Electronic Science and Engineering , Nanjing University , Nanjing 210093 , China
| | - Hark Hoe Tan
- Department of Electronic Materials Engineering, Research School of Physics and Engineering , The Australian National University , Canberra , ACT 2601 , Australia
| | - Chennupati Jagadish
- Department of Electronic Materials Engineering, Research School of Physics and Engineering , The Australian National University , Canberra , ACT 2601 , Australia
| | - Jiandong Ye
- School of Electronic Science and Engineering , Nanjing University , Nanjing 210093 , China
- Department of Electronic Materials Engineering, Research School of Physics and Engineering , The Australian National University , Canberra , ACT 2601 , Australia
- Collaborative Innovation Center of Solid-State Lighting and Energy-Saving Electronics , Nanjing University , Nanjing 210093 , China
| |
Collapse
|