Kahraman, Abdullah; Socie, Etienne; Nazari, Maryam; Kazazis, Dimitrios; Buldu-Akturk, Merve; Kabanova, Victoria; Biasin, Elisa; Smolentsev, Grigory; Grolimund, Daniel; Erdem, Emre; Moser, Jacques E; Cannizzo, Andrea; Bacellar, Camila; Milne, Christopher (2024). Tailoring p-Type Behavior in ZnO Quantum Dots through Enhanced Sol-Gel Synthesis: Mechanistic Insights into Zinc Vacancies. The journal of physical chemistry letters, 15(6), pp. 1755-1764. American Chemical Society 10.1021/acs.jpclett.3c03519
|
Text
kahraman-et-al-2024-tailoring-p-type-behavior-in-zno-quantum-dots-through-enhanced-sol-gel-synthesis-mechanistic.pdf - Published Version Available under License Creative Commons: Attribution (CC-BY). Download (3MB) | Preview |
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.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
08 Faculty of Science > Institute of Applied Physics 08 Faculty of Science > Institute of Applied Physics > Lasers |
UniBE Contributor: |
Nazari Haghighi Pashaki, Maryam, Cannizzo, Andrea |
Subjects: |
600 Technology > 620 Engineering 000 Computer science, knowledge & systems |
ISSN: |
1948-7185 |
Publisher: |
American Chemical Society |
Language: |
English |
Submitter: |
Pubmed Import |
Date Deposited: |
08 Feb 2024 13:17 |
Last Modified: |
16 Feb 2024 00:16 |
Publisher DOI: |
10.1021/acs.jpclett.3c03519 |
PubMed ID: |
38324709 |
BORIS DOI: |
10.48350/192661 |
URI: |
https://boris.unibe.ch/id/eprint/192661 |
Actions (login required)
 |
Edit item |