Mechanisms of Spontaneous and Amplified Spontaneous Emission in CH3NH3PbI3 Perovskite Thin Films Integrated in an Optical Waveguide
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Mechanisms of Spontaneous and Amplified Spontaneous Emission in CH3NH3PbI3 Perovskite Thin Films Integrated in an Optical WaveguideAutoria
Data de publicació
2020Editor
American Physical SocietyISSN
2331-7019Cita bibliogràfica
Suárez, I., Juárez-Pérez, E. J., Chirvony, V. S., Mora-Seró, I., & Martínez-Pastor, J. P. Mechanisms of spontaneous and amplified spontaneous emission in CH 3 NH 3 PbI 3 perovskite thin films integrated in an optical waveguide.Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
https://journals.aps.org/prapplied/abstract/10.1103/PhysRevApplied.13.064071Versió
info:eu-repo/semantics/publishedVersionResum
In this paper, the physical mechanisms responsible for optical gain in CH3NH3PbI3 (MAPI) polycrystalline thin films are investigated experimentally and theoretically. Waveguide structures composed by
a MAPI film ... [+]
In this paper, the physical mechanisms responsible for optical gain in CH3NH3PbI3 (MAPI) polycrystalline thin films are investigated experimentally and theoretically. Waveguide structures composed by
a MAPI film embedded in between PMMA and silica layers are used as an efficient geometry to confine
emitted light in MAPI films and minimize the energy threshold for amplified spontaneous emission (ASE).
We show that photogenerated exciton density at the ASE threshold is as low as (2.4 − 12) × 1016 cm−3,
which is below the Mott transition density reported for this material and the threshold transparency condition deduced with the free-carrier model. Such a low threshold indicates that the formation of excitons
plays an important role in the generation of optical gain in MAPI films. The rate-equation model including gain is incorporated into a beam-propagation algorithm to describe waveguided spontaneous emission
and ASE in MAPI films, while using the optical parameters experimentally determined in this work.
This model is a useful tool to design active photonic devices based on MAPI and other metal-halide
semiconductors. [-]
Publicat a
Physical Review Applied 13, 064071 (2020)Proyecto de investigación
TEC2017-86102-C2-1-R, ENE2017-90565-REDT, Prometeo/2018/098, UV-INV-AE16-514545, 724424 - NoLIMITDrets d'accés
© 2020 American Physical Society
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