Recycled Photons Traveling Several Millimeters in Waveguides Based on CsPbBr3 Perovskite Nanocrystals
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Títol
Recycled Photons Traveling Several Millimeters in Waveguides Based on CsPbBr3 Perovskite NanocrystalsAutoria
Data de publicació
2021-07-09Editor
Wiley-VCH GmbHISSN
2195-1071Cita bibliogràfica
Navarro-Arenas, J., Suárez, I., Gualdrón-Reyes, A. F., Mora-Seró, I., Bisquert, J., Martínez-Pastor, J. P., Recycled Photons Traveling Several Millimeters in Waveguides Based on CsPbBr3 Perovskite Nanocrystals. Adv. Optical Mater. 2021, 2100807. https://doi.org/10.1002/adom.202100807Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
https://onlinelibrary.wiley.com/doi/full/10.1002/adom.202100807Versió
info:eu-repo/semantics/publishedVersionParaules clau / Matèries
Resum
Reabsorption and reemission of photons, or photon recycling (PR) effect, represents an outstanding mechanism to enhance the carrier and photon densities in semiconductor thin films. This work demonstrates the propagation ... [+]
Reabsorption and reemission of photons, or photon recycling (PR) effect, represents an outstanding mechanism to enhance the carrier and photon densities in semiconductor thin films. This work demonstrates the propagation of recycled photons over several mm by integrating a thin film of CsPbBr3 nanocrystals into a planar waveguide. An experimental set-up based on a frequency modulation spectroscopy allows to characterize the PR effect and the determination of the effective decay time of outcoupled photons. A correlation between the observed photoluminescence redshift and the increase of the effective decay time is demonstrated, which grows from 3.5 to near 9 ns in the best device. A stochastic Monte Carlo model reproduces these experimental results and allows the extraction of the physical mechanisms involved. In the waveguide under study recycled photons follow a drift (directional enhancement) velocity ≈5.7 × 105 m s−1, dominating over the diffusive regime observed in a standard thin film (D ≈ 420 m2 s−1). This means that recycled photons propagate mm-distances in shorter traveling times in the waveguide (≈5 ns) as compared to the film (>20 ns). These results are expected to pave the road for exploiting the PR effect in future optoelectronic and photonic devices. [-]
Publicat a
Advanced Optical Materials, 2021, 2100807Drets d'accés
info:eu-repo/semantics/openAccess
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