Near-Band-Edge Optical Responses of CH_{3}NH_{3}PbCl_{3} Single Crystals: Photon Recycling of Excitonic Luminescence

Physical Review Letters
Takumi YamadaYoshihiko Kanemitsu

Abstract

The determination of the band gap and exciton energies of lead halide perovskites is very important from the viewpoint of fundamental physics and photonic device applications. By using photoluminescence excitation (PLE) spectra, we reveal the optical properties of CH_{3}NH_{3}PbCl_{3} single crystals in the near-band-edge energy regime. The one-photon PLE spectrum exhibits the 1s exciton peak at 3.11 eV. On the contrary, the two-photon PLE spectrum exhibits no peak structure. This indicates photon recycling of excitonic luminescence. By analyzing the spatial distribution of the excitons and photon recycling, we obtain 3.15 eV for the band gap energy and 41 meV for the exciton binding energy.

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Citations

Nov 11, 2019·The Journal of Chemical Physics·Yoshihiko Kanemitsu
Jul 25, 2019·Science Advances·Taketo HandaYoshihiko Kanemitsu
Dec 23, 2019·The Journal of Chemical Physics·Takumi YamadaYoshihiko Kanemitsu
Apr 10, 2019·Nature Communications·Adrien BercegolLaurent Lombez
Feb 18, 2020·Chemistry, an Asian Journal·Yoshihiko Kanemitsu, Yasuhiro Yamada
Nov 12, 2020·Physical Chemistry Chemical Physics : PCCP·Taketo HandaYoshihiko Kanemitsu
Nov 20, 2019·ACS Applied Materials & Interfaces·Qiang XuXiaoping Ouyang
Nov 26, 2021·ACS Photonics·Marco van der LaanPeter Schall

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