Back to Search
Start Over
Giant Photoluminescence Enhancement in CsPbCl3 Perovskite Nanocrystals by Simultaneous Dual-Surface Passivation
- Source :
- ACS Energy Letters. 3:2301-2307
- Publication Year :
- 2018
- Publisher :
- American Chemical Society (ACS), 2018.
-
Abstract
- The presence of localized trap states on the surface of CsPbCl3 perovskite nanocrystals (NCs) is one of the greatest challenges precluding the development of optoelectronic applications of these NCs. Passivation of these defect sites provides a promising pathway to remediating their electronic and optical properties, such as the photoluminescence quantum yield (PLQY). Herein, we demonstrate a postsynthetic dual-surface treatment using trivalent metal ion salts, i.e., YCl3, as a new passivation approach that enhances the PLQY up to 60% while preserving the NC size and crystal structure. Such remarkable enhancement of the PLQY along with prolongation of the average PL lifetimes of treated NCs samples indicates effective passivation of the surface defects and subsequent suppression of the formation of surface nonradiative recombination centers. As a segue toward optoelectronic applications, we probed the photoelectric performance of the NCs using ultraflexible devices; we found that YCl3-treated CsPbCl3 NC f...
- Subjects :
- Photoluminescence
Materials science
Passivation
Renewable Energy, Sustainability and the Environment
business.industry
Energy Engineering and Power Technology
Quantum yield
02 engineering and technology
Crystal structure
Photoelectric effect
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
0104 chemical sciences
Metal
Fuel Technology
Nanocrystal
Chemistry (miscellaneous)
visual_art
Materials Chemistry
visual_art.visual_art_medium
Optoelectronics
0210 nano-technology
business
Perovskite (structure)
Subjects
Details
- ISSN :
- 23808195
- Volume :
- 3
- Database :
- OpenAIRE
- Journal :
- ACS Energy Letters
- Accession number :
- edsair.doi...........79898c3ea5da67a45fd05225d0f81df6
- Full Text :
- https://doi.org/10.1021/acsenergylett.8b01441