High linear polarization of photoluminescence of GaInP epilayers at low temperature

Prutskij, T.; Seredin, P. V.; Attolini, G.

doi:10.1016/j.jlumin.2019.04.033

Cited by 3 publications

(1 citation statement)

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“…The degree of PL polarization memory was defined as P PL = (PL || – PL ⊥ )/(PL || + PL ⊥ ), where PL || (PL ⊥ ) is the PL emission with polarization parallel (perpendicular) to the excitation beam. − It is clearly seen that the PL emission is partially polarized at a short wavelength, with P PL of 12% around the peak of n = 2 (PL 2 ). In Figure c, the angular (θ) dependent PL 2 at 586 nm at 300 K is shown, where θ is the angular difference between polarization directions of the excitation laser beam and polarizer before the spectrometer.…”

Section: Resultsmentioning

confidence: 99%

Slow Hot-Carrier-Cooling in a 2D Lead-Iodide Perovskite Film and Its Photovoltaic Device

Huang

Zhang

et al. 2022

J. Phys. Chem. C

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Significantly slow hot-carrier-cooling happens in a multiphase quasi two-dimensional (2D) perovskite film of (BA) 2 (FA) n−1 Pb n I 3n+1 , where BA is butylammonium, FA is formamidinium, and n = 3 nominally. Due to this phenomenon, a linearly polarized multi-peak emission from phases of n = 2, 3, and 4 emerges and the ever-present one from n = ∞ phase blueshifts in the photoluminescence (PL) spectra, excited using a nanosecond pulsed laser with increasing excitation intensities. Furthermore, hot-carrier PL from small n materials also emerges using a continuous wave laser with an intensity of ∼100 mW/cm 2 ; consequently, the abnormal enhancement of the open-circuit voltage through hot-carrier extraction above 300 mW/cm 2 is achieved. Our work may prove that the FA-based 2D perovskite gives a direction to fabricating hot-carrier solar cells that potentially boost the power conversion efficiency.

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Section: Resultsmentioning

confidence: 99%