Bi3+ Heterovalent Doping in APbBr3 Lead Halide Perovskite Single Crystals: Urbach Tail and Photon Recycling Effect

We focused on Bi3+ as a promising candidate for donor impurity in lead halide perovskites and fabricated electron-doped CH3NH3PbBr3 single crystals. Room-temperature optical measurement revealed the increase in Urbach tail and suppression of photon recycling effect by Bi doping, which results in pho...

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Bibliographic Details
Published in:Journal of physics. Conference series 2019-05, Vol.1220 (1)
Main Authors: Hoyano, Mizuki, Akashi, Ryo, Oto, Kenichi, Kanemitsu, Yoshihiko, Yamada, Yasuhiro
Format: Article
Language:English
Subjects:
Cryogenic temperature
Doping
Excitons
Inhomogeneity
Lead compounds
Low temperature
Metal halides
Optical measurement
Optical properties
Perovskites
Photoluminescence
Photons
Physics
Recycling
Room temperature
Single crystals
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Summary:We focused on Bi3+ as a promising candidate for donor impurity in lead halide perovskites and fabricated electron-doped CH3NH3PbBr3 single crystals. Room-temperature optical measurement revealed the increase in Urbach tail and suppression of photon recycling effect by Bi doping, which results in photoluminescence (PL) blue shift. Furthermore, we conducted optical reflectance and PL measurements at cryogenic temperature, where the thermal broadening is supressed. At low temperature, exciton dominates the optical properties and the photon recycling effect is negligible. From the PL intensity and spectral width, we quantitatively evaluated the impact of Bi-doping on crystal inhomogeneity.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1220/1/012052