Electron trapping on Fe3+ sites in photodoped ZnO colloidal nanocrystals

2016 ◽  
Vol 52 (58) ◽  
pp. 9101-9104 ◽  
Author(s):  
Dongming Zhou ◽  
Kevin R. Kittilstved
Keyword(s):  
Experimental Study ◽  
Quantum Dots ◽  
Conduction Band ◽  
Electron Trapping ◽  
Colloidal Nanocrystals ◽  
Doped Zno ◽  
Zno Quantum Dots

Experimental study of photodoped colloidal Fe-doped ZnO quantum dots suggest electrons trap on Fe3+ sites before accumulating in the ZnO conduction band.

scholarly journals P2GS.15 - Highly Sensitive Acetylene Sensing Properties of Al- and In-doped ZnO Quantum Dots

2018 ◽  
Author(s):  
M. S. Park ◽  
R. Yoo ◽  
B. Jang ◽  
Y. Park ◽  
M.H. Kim ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Sensing Properties ◽  
Highly Sensitive ◽  
Doped Zno ◽  
Zno Quantum Dots

Single-phased emission-tunable Mg and Ce co-doped ZnO quantum dots for white LEDs

2020 ◽  
Vol 231 ◽  
pp. 118096 ◽  
Author(s):  
Qiang Shi ◽  
Kai Ling ◽  
Susu Duan ◽  
Xue Wang ◽  
Shengxiang Xu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
White Leds ◽  
Doped Zno ◽  
Zno Quantum Dots ◽  
Co Doped

Highly Sensitive Acetone Gas Sensors Based on in-Doped ZnO Quantum Dots Fabricated By Morphology Controlled Synthesis

2020 ◽  
Vol MA2020-01 (28) ◽  
pp. 2121-2121
Author(s):  
Jun Ho Lee ◽  
Seung-Eun Baek ◽  
Hyun-Sook Lee ◽  
Dahl-Young Khang ◽  
Wooyoung Lee
Keyword(s):  
Quantum Dots ◽  
Gas Sensors ◽  
Controlled Synthesis ◽  
Highly Sensitive ◽  
Doped Zno ◽  
Zno Quantum Dots

scholarly journals Adjusting the band structure and defects of ZnO quantum dots via tin doping

RSC Advances ◽  
2017 ◽  
Vol 7 (19) ◽  
pp. 11345-11354 ◽  
Author(s):  
Weimin Yang ◽  
Bing Zhang ◽  
Qitu Zhang ◽  
Lixi Wang ◽  
Bo Song ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Quantum Dots ◽  
Band Structure ◽  
Density Functional ◽  
Band Structures ◽  
Functional Theory ◽  
Doped Zno ◽  
Zno Quantum Dots

The structures and band structures of Sn doped ZnO were investigated by density functional theory as well as experiment.

Luminescence Properties of Sm3+/Eu3+ Co-Doped ZnO Quantum Dots

2016 ◽  
Vol 16 (4) ◽  
pp. 3597-3601
Author(s):  
Fengyi Liu ◽  
Hong Li ◽  
Yajing Hu ◽  
Na Jin ◽  
Yun Mou ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Sol Gel ◽  
Spherical Shape ◽  
Hexagonal Wurtzite Structure ◽  
Luminescence Properties ◽  
Transmission Electron ◽  
Doped Zno ◽  
Zno Quantum Dots ◽  
Zno Qds ◽  
Co Doped

In order to improve luminescence properties of semiconductor ZnO quantum dots (QDs), Sm3+/Eu3+ co-doped ZnO QDs have been controllably synthesized by sol–gel method in this paper. ZnO QDs have a spherical shape with mean diameter at about 5–6 nm, which was characterized by high-resolution transmission electron microscopy (HRTEM). ZnO QDs have hexagonal wurtzite structure with parts of Sm3+ and Eu3+ incorporated into the lattice, which was demonstrated by X-ray Diffraction (XRD). Luminescence properties at room temperature (RT) of different amount of Sm3+ and 2 mol% Eu3+ doped ZnO QDs were examined in-depth by optical spectra. In contrast to the Pr3+/Eu3+ co-doped fluorescent performance researched in our previous study, the photoluminescence (PL) spectra indicates the unique luminescence properties of Sm3+/Eu3+ co-doped ZnO QDs. In addition, fluorescence lifetimes were obtained to illustrate the luminous mechanism.

Microstructure and Luminescence Properties of Tb3+ Doped ZnO Quantum Dots

2016 ◽  
Vol 16 (4) ◽  
pp. 3592-3596 ◽  
Author(s):  
Na Jin ◽  
Hong Li ◽  
Fengyi Liu ◽  
Ya-Hong Xie
Keyword(s):  
Quantum Dots ◽  
Surface Defects ◽  
Light Emission ◽  
Sol Gel ◽  
Spherical Shape ◽  
Hexagonal Wurtzite Structure ◽  
Quenching Effect ◽  
Doped Zno ◽  
Zno Quantum Dots ◽  
Zno Qds

In order to increase the exchange efficiency of solar cells by down-conversion, Tb3+ doped ZnO quantum dots (QDs) were successfully synthesized by sol–gel process. The X-ray diffraction (XRD) results indicate that ZnO QDs have hexagonal wurtzite structure. ZnO QDs have a spherical shape and diameter around 5 nm, which was confirmed by high-resolution transmission electron microscopy (HRTEM). The intensity of visible light emission peaks becomes strengthened and then weakened with the increase of Tb3+ doping concentration. When the concentration is more than 1%, because of the decrease of surface defects and concentration quenching effect, the emissive intensity is weakened. The enhancement of the PL emission peaks at 542 nm, 582 nm, and 619 nm was assigned to energy transfer between Tb3+ ions and ZnO QDs host. Moreover, the absorption spectra also demonstrates energy transfers from Tb3+ ions to ZnO QDs.

Synthesis of Cu-doped ZnO quantum dots and their applications in field emission

2016 ◽  
Vol 671 ◽  
pp. 473-478 ◽  
Author(s):  
Lei Sun ◽  
Zhixian Lin ◽  
Xiongtu Zhou ◽  
Yongai Zhang ◽  
Tailiang Guo
Keyword(s):  
Quantum Dots ◽  
Field Emission ◽  
Doped Zno ◽  
Zno Quantum Dots

Enhancing the stability of the electron density in electrochemically doped ZnO quantum dots

2019 ◽  
Vol 151 (14) ◽  
pp. 144708 ◽  
Author(s):  
Solrun Gudjonsdottir ◽  
Christel Koopman ◽  
Arjan J. Houtepen
Keyword(s):  
Quantum Dots ◽  
Electron Density ◽  
Doped Zno ◽  
Zno Quantum Dots ◽  
The Stability
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