Interface/defect-tuneable macro and micro photoluminescence behaviours of trivalent europium ions in electrospun ZrO2/ZnO porous nanobelts.
It was demonstrated that suitable interfaces between two materials can enhance the separation of photogenerated carriers. In this study, ZrO2/ZnO interfaces with type I structure were designed and prepared by the electrospinning technique. The obtained ZrO2/ZnO:Eu3+(ZZOE) composites are highly porous in the form of nanobelts with width of 600-700 nm, comprising ZnO and ZrO2nanocrystals, and the Eu doping can hinder the t-m phase transition of ZrO2. By tuning the annealing temperature, the inner stress and defects can be well controlled to improve the photoluminescence (PL) of the ZZOE porous nanobelts. Macro- and micro-PL spectra indicated that the body oxygen vacancies benefit the PL from Eu3+ions, whereas the surficial ones do not. The optimal parameters for the preparation of ZZOE porous nanobelts were also investigated. Finally, a charge transfer mechanism was proposed to illuminate the PLs from the ZZOE porous nanobelts.
School of Physical Science and Technology, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, China. zhoujy@lzu.edu.cn xieeq@lzu.edu.cn.
Yanzhe
http://orcid.org/0000-0002-1875-9061
Y
Mao
School of Physical Science and Technology, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, China. zhoujy@lzu.edu.cn xieeq@lzu.edu.cn.
Jinglong
http://orcid.org/0000-0002-9356-8820
J
Bai
School of Physical Science and Technology, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, China. zhoujy@lzu.edu.cn xieeq@lzu.edu.cn.
Mingxiang
http://orcid.org/0000-0001-9184-5778
M
Zhang
School of Physical Science and Technology, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, China. zhoujy@lzu.edu.cn xieeq@lzu.edu.cn.
Hao
http://orcid.org/0000-0001-7776-1201
H
Zhao
Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, China.
Gengzhi
http://orcid.org/0000-0002-8000-8912
G
Sun
School of Physical Science and Technology, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, China. zhoujy@lzu.edu.cn xieeq@lzu.edu.cn.
Xiaojun
http://orcid.org/0000-0003-2018-492X
X
Pan
School of Physical Science and Technology, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, China. zhoujy@lzu.edu.cn xieeq@lzu.edu.cn.
Zhenxing
http://orcid.org/0000-0002-4946-0492
Z
Zhang
School of Physical Science and Technology, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, China. zhoujy@lzu.edu.cn xieeq@lzu.edu.cn.
Jinyuan
http://orcid.org/0000-0003-0284-105X
J
Zhou
School of Physical Science and Technology, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, China. zhoujy@lzu.edu.cn xieeq@lzu.edu.cn.
Erqing
http://orcid.org/0000-0001-5647-6938
E
Xie