Tailoring p-Type Behavior in ZnO Quantum Dots through Enhanced Sol-Gel Synthesis: Mechanistic Insights into Zinc Vacancies

被引：0

作者：

Kahraman, Abdullah ^{[1
,2
,3
]}

Socie, Etienne ^{[4
]}

Nazari, Maryam ^{[5
]}

Kazazis, Dimitrios ^{[1
]}

Buldu-Akturk, Merve ^{[6
]}

Kabanova, Victoria ^{[1
]}

Biasin, Elisa ^{[7
]}

Smolentsev, Grigory ^{[1
]}

Grolimund, Daniel ^{[1
]}

Erdem, Emre ^{[6
]}

Moser, Jacques E. ^{[4
]}

Cannizzo, Andrea ^{[5
]}

Bacellar, Camila ^{[1
]}

Milne, Christopher ^{[8
]}

机构：

[1] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

[2] Pacific Northwest Natl Lab, Phys Sci Div, Richland, WA 99352 USA

[3] Stanford Univ, Stanford PULSE Inst, SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA

[4] Ecole Polytech Fed Lausanne EPFL, CH-1015 Lausanne, Switzerland

[5] Univ Bern, Inst Appl Phys, CH-3012 Bern, Switzerland

[6] Sabanci Univ, Fac Engn & Nat Sci, TR-34956 Istanbul, Turkiye

[7] Pacific Northwest Natl Lab, Phys Sci Div, Richland, WA 99352 USA

[8] European XFEL GmbH, D-22869 Schenefeld, Germany

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2024年 / 15卷 / 06期

基金：

瑞士国家科学基金会;

关键词：

CHARGE-CARRIER DYNAMICS; TEMPERATURE-DEPENDENCE; OXIDE NANOPARTICLES; N-TYPE; GROWTH; FERROMAGNETISM; CONDUCTIVITY; RELAXATION; ULTRAFAST; EVOLUTION;

D O I：

10.1021/acs.jpclett.3c03519

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The synthesis and control of properties of p-type ZnO is crucial for a variety of optoelectronic and spintronic applications; however, it remains challenging due to the control of intrinsic midgap (defect) states. In this study, we demonstrate a synthetic route to yield colloidal ZnO quantum dots (QD) via an enhanced sol-gel process that effectively eliminates the residual intermediate reaction molecules, which would otherwise weaken the excitonic emission. This process supports the creation of ZnO with p-type properties or compensation of inherited n-type defects, primarily due to zinc vacancies under oxygen-rich conditions. The in-depth analysis of carrier recombination in the midgap across several time scales reveals microsecond carrier lifetimes at room temperature which are expected to occur via zinc vacancy defects, supporting the promoted p-type character of the synthesized ZnO QDs.

引用

页码：1755 / 1764

页数：10

共 34 条

[1] Sol-gel synthesis of p-type zinc oxide using potassium permanganate
Bu, Ian Yi-Yu
OPTIK, 2019, 179 : 259 - 265
[2] Sol-gel synthesis of p-type zinc oxide using aluminium nitrate and ammonia
Bu, Ian Y. Y.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY, 2015, 28 : 91 - 96
[3] Sol-gel method of p-type zinc oxide films preparation
Poghosyan, Armen R.
Li, XiaoNan
Manukyan, Alexandr L.
Grigoryan, Stepan G.
Vardanyan, Eduard S.
PHOTONIC FIBER AND CRYSTAL DEVICES: ADVANCES IN MATERIALS AND INNOVATIONS IN DEVICE APPLICATIONS, 2007, 6698
[4] Tailoring Sb doping concentration to achieve p-type nanostructured ZnO thin film grown by sol-gel method
Sedefoglu, Nazmi
Erdogan, Necdet H.
Kutlu, Taner
Kavak, Hamide
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS, 2023, 34 (03)
[5] Sol-gel production of p-type ZnO thin film by using sodium doping
Bu, Ian Y. Y.
SUPERLATTICES AND MICROSTRUCTURES, 2016, 96 : 59 - 66
[6] Preparation of surface-modified ZnO quantum dots through an ultrasound assisted sol-gel process
Moghaddam, E.
Youzbashi, A. A.
Kazemzadeh, A.
Eshraghi, M. J.
APPLIED SURFACE SCIENCE, 2015, 346 : 111 - 114
[7] Sol-Gel Growth of Hexagonal Faceted ZnO Prism Quantum Dots with Polar Surfaces for Enhanced Photocatalytic Activity
Zhang, Luyuan
Yin, Longwei
Wang, Chengxiang
Lun, Ning
Qi, Yongxin
ACS APPLIED MATERIALS & INTERFACES, 2010, 2 (06) : 1769 - 1773
[8] Preparation of p-type ZnO:(Al, N) by a combination of sol-gel and ion-implantation techniques
薛书文
祖小涛
邵乐喜
袁兆林
向霞
邓宏
Chinese Physics B, 2008, 17 (06) : 2240 - 2244
[9] Sodium and potassium doped P-type ZnO films by sol-gel spin-coating technique
Au, Benedict Wen-Cheun
Chan, Kah-Yoong
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2017, 123 (07):
[10] Sodium and potassium doped P-type ZnO films by sol-gel spin-coating technique
Benedict Wen-Cheun Au
Kah-Yoong Chan
Applied Physics A, 2017, 123

← 1 2 3 4 →