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Narrow Linewidth Excitonic Emission in Organic-Inorganic Lead Iodide Perovskite Single Crystals
- Source :
- Journal of Physical Chemistry Letters, Journal of Physical Chemistry Letters, 2016, 7 (24), pp.5093-5100. ⟨10.1021/acs.jpclett.6b02261⟩, Journal of Physical Chemistry Letters, American Chemical Society, 2016, 7 (24), pp.5093-5100. ⟨10.1021/acs.jpclett.6b02261⟩, The Journal of Physical Chemistry Letters
- Publication Year :
- 2016
- Publisher :
- HAL CCSD, 2016.
-
Abstract
- International audience; Hybrid perovskite thin films have demonstrated impressive performance for solar energy conversion and optoelectronic applications. However, further progress will benefit from a better knowledge of the intrinsic photophysics of materials. Here, the temperature-dependent emission properties of CH3NH3PbI3 single crystals are investigated and compared to those of thin polycrystalline films by means of steady-state and time-resolved photoluminescence spectroscopy. Single crystals photoluminescence present a sharp excitonic emission at high energy, with full width at half maximum of only 5 meV, assigned to free excitonic recombination. We highlight a strong thermal broadening of the free excitonic emission, due to exciton–LO-phonon coupling. The emission turned to be very short-lived with a subnanosecond dynamics, mainly induced by the fast trapping of the excitons. The free excitonic emission is completely absent of the thin film spectra, which are dominated by trap state bands.
- Subjects :
- Materials science
Photoluminescence
Exciton
02 engineering and technology
010402 general chemistry
7. Clean energy
01 natural sciences
Laser linewidth
Condensed Matter::Materials Science
Condensed Matter::Superconductivity
General Materials Science
Physical and Theoretical Chemistry
Thin film
Spectroscopy
Perovskite (structure)
business.industry
Condensed Matter::Other
021001 nanoscience & nanotechnology
Condensed Matter::Mesoscopic Systems and Quantum Hall Effect
0104 chemical sciences
[CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry
Full width at half maximum
[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]
Optoelectronics
Crystallite
0210 nano-technology
business
Subjects
Details
- Language :
- English
- ISSN :
- 19487185
- Database :
- OpenAIRE
- Journal :
- Journal of Physical Chemistry Letters, Journal of Physical Chemistry Letters, 2016, 7 (24), pp.5093-5100. ⟨10.1021/acs.jpclett.6b02261⟩, Journal of Physical Chemistry Letters, American Chemical Society, 2016, 7 (24), pp.5093-5100. ⟨10.1021/acs.jpclett.6b02261⟩, The Journal of Physical Chemistry Letters
- Accession number :
- edsair.doi.dedup.....ebeea0cb3cfd47348ba45b1dce7e7e86