Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 11, Issue 15, Pages 5863-5870Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.0c01640
Keywords
-
Categories
Funding
- National Natural Science Foundation of China [61804102]
- Natural Science Foundation of Jiangsu Province [BK20180835]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PADA)
- Hong Kong Research Grant Council [11303618]
Ask authors/readers for more resources
For quantum-dot photodiodes comprising an electron-transporting layer assembled of ZnO nanoparticles, the light emitter/absorber generally exhibits enhanced optoelectronic performance after the device is shelf-aged. To understand the so-called positive aging effect, the optoelectronic properties of ZnO nanoparticles are investigated at the thin film and device level as a function of aging time. It is evidenced that the aging process is driven by a surface-stabilizing mechanism of ZnO nanoparticles, in which the active surface adsorption sites for oxygen are gradually but irreversibly stabilized, i.e.. with surface termination of HO-ZnO, leading to reduced nonradiative recombination and increased built-in potential in the adjacent photoactive layer. This work provides insight into new synthetic routes for minimizing the negative impact caused by the aging process.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available