Halide exchange and surface modification of metal halide perovskite nanocrystals with alkyltrichlorosilanes
Abstract
Metal halide perovskite nanocrystals have recently emerged as promising materials for light emitting displays and lasing applications due to their narrow emission wavelengths, high photoluminescence quantum yields, and readily adjustable emission wavelengths. For these metal halide perovskite nanocrystals to be useful in commercial applications, their stability must be increased and the photoluminescence quantum yields of the iodide (red emitting) and chloride (blue emitting) containing derivatives must also be increased. The photoluminescence quantum yields of blue emitting CsPbCl3 nanoparticles lag behind those of green emitting CsPbBr3 nanoparticles, with maximum photoluminescence quantum yields of 1–10% previously reported for CsPbCl3 as compared to 80–100% for CsPbBr3. Herein, we show that alkyltrichlorosilanes (R-SiCl3) can be used as Cl-sources for rapid anion exchange with host CsPbBr3 nanocrystals. This anion exchange reaction is advantageous in that it can be performed at room temperature and results in highly dispersible nanoparticles coated with siloxane shells. CsPbCl3 nanoparticles produced through Cl-exchange with R-SiCl3 show significantly improved long-term stability and high photoluminescence quantum yields of up to 12%. Finally, these siloxane coated nanocrystals are even stable in the presence of water, whereas CsPbCl3 nanoparticles synthesized through other routes rapidly degrade in the presence of water.
- Publication Date:
- Research Org.:
- Univ. of Kentucky, Lexington, KY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1594896
- Alternate Identifier(s):
- OSTI ID: 1468492
- Grant/Contract Number:
- SC0018208
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nanoscale
- Additional Journal Information:
- Journal Volume: 10; Journal Issue: 35; Journal ID: ISSN 2040-3364
- Publisher:
- Royal Society of Chemistry
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 77 NANOSCIENCE AND NANOTECHNOLOGY; 36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Citation Formats
Uddin, Md Aslam, Calabro, Rosemary L., Kim, Doo-Young, and Graham, Kenneth R. Halide exchange and surface modification of metal halide perovskite nanocrystals with alkyltrichlorosilanes. United States: N. p., 2018.
Web. doi:10.1039/c8nr04763d.
Uddin, Md Aslam, Calabro, Rosemary L., Kim, Doo-Young, & Graham, Kenneth R. Halide exchange and surface modification of metal halide perovskite nanocrystals with alkyltrichlorosilanes. United States. https://doi.org/10.1039/c8nr04763d
Uddin, Md Aslam, Calabro, Rosemary L., Kim, Doo-Young, and Graham, Kenneth R. Mon .
"Halide exchange and surface modification of metal halide perovskite nanocrystals with alkyltrichlorosilanes". United States. https://doi.org/10.1039/c8nr04763d. https://www.osti.gov/servlets/purl/1594896.
@article{osti_1594896,
title = {Halide exchange and surface modification of metal halide perovskite nanocrystals with alkyltrichlorosilanes},
author = {Uddin, Md Aslam and Calabro, Rosemary L. and Kim, Doo-Young and Graham, Kenneth R.},
abstractNote = {Metal halide perovskite nanocrystals have recently emerged as promising materials for light emitting displays and lasing applications due to their narrow emission wavelengths, high photoluminescence quantum yields, and readily adjustable emission wavelengths. For these metal halide perovskite nanocrystals to be useful in commercial applications, their stability must be increased and the photoluminescence quantum yields of the iodide (red emitting) and chloride (blue emitting) containing derivatives must also be increased. The photoluminescence quantum yields of blue emitting CsPbCl3 nanoparticles lag behind those of green emitting CsPbBr3 nanoparticles, with maximum photoluminescence quantum yields of 1–10% previously reported for CsPbCl3 as compared to 80–100% for CsPbBr3. Herein, we show that alkyltrichlorosilanes (R-SiCl3) can be used as Cl-sources for rapid anion exchange with host CsPbBr3 nanocrystals. This anion exchange reaction is advantageous in that it can be performed at room temperature and results in highly dispersible nanoparticles coated with siloxane shells. CsPbCl3 nanoparticles produced through Cl-exchange with R-SiCl3 show significantly improved long-term stability and high photoluminescence quantum yields of up to 12%. Finally, these siloxane coated nanocrystals are even stable in the presence of water, whereas CsPbCl3 nanoparticles synthesized through other routes rapidly degrade in the presence of water.},
doi = {10.1039/c8nr04763d},
journal = {Nanoscale},
number = 35,
volume = 10,
place = {United States},
year = {Mon Aug 27 00:00:00 EDT 2018},
month = {Mon Aug 27 00:00:00 EDT 2018}
}
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Works referencing / citing this record:
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