Light Emission Enhancement by Tuning the Structural Phase of APbBr(3) (A = CH3NH3, Cs) Perovskites

Cited 5 time in webofscience Cited 0 time in scopus
  • Hit : 155
  • Download : 0
Lead halide perovskite (APbX(3)) has recently emerged as a promising active layer in light-emitting diodes (LEDs) as well as an absorber for photovoltaic devices. For better LED properties, it is important to understand the fundamental mechanism of the optoelectronic behaviors, e.g., how the nanostructure of the APbX(3) thin film correlates with its emitting properties. We investigated the effect of APbBr(3) (A = CH3NH3, Cs) crystallite size on the photophysical properties regarding its crystallographic changes and spin-orbit coupling. Photoluminescence lifetime measurements, Xray and electron diffraction analyses, and density functional theory calculations were performed. We demonstrate that the emitting properties of mesoscale APbBr(3) crystallites are improved due to the formation of a pure cubic phase that leads to the spin- and momentum-allowed carrier recombination. Our findings provide fundamental insights into the emitting behavior of APbBr(3), which suggests a control of its optoelectronic properties by means of modulating the crystal morphology and resultant electronic band structures.
Publisher
AMER CHEMICAL SOC
Issue Date
2019-05
Language
English
Article Type
Article
Citation

JOURNAL OF PHYSICAL CHEMISTRY LETTERS, v.10, no.9, pp.2135 - 2142

ISSN
1948-7185
DOI
10.1021/acs.jpclett.9b00829
URI
http://hdl.handle.net/10203/262245
Appears in Collection
EEW-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 5 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0