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- W4377047699 abstract "The goal of this research is to see how excitation wavelength affects steady-state photoluminescence (PL), time-resolved photoluminescence (TRPL), and amplified spontaneous emission (ASE) in CsPbBr 3 perovskite quantum dots (PQD). At PL and ASE, a plausible mechanism for explaining the excitation wavelength-dependent phenomena was proposed. The PL and ASE properties of CsPbBr 3 PQD as optical materials were examined experimentally at excitation wavelengths of 355–450 nm. An optical parametric amplifier system was used to accomplish optical pumping utilizing a laser pulse with a pulse duration of 70 ps. The ASE threshold was explored and compared the ratio of photons in the pump pulse to band gap energies. The excitation wavelength ( λ ex ) has a considerable influence on the ASE behavior, with high optical densities correlating to optimal excitation, as evidenced by the absorption spectrum, which has a larger absorption coefficient. Furthermore, the energy density at the ASE threshold was closely correlated with the λ ex following the absorption spectrum. Also, it has been demonstrated that changing the excitation wavelength reduces the PQD PL lifetime. Finally, electron-hole pairs can be produced at a reasonable depth from the film’s surface using the appropriate excitation wavelength." @default.
- W4377047699 created "2023-05-19" @default.
- W4377047699 creator A5001275773 @default.
- W4377047699 creator A5035461673 @default.
- W4377047699 creator A5083600211 @default.
- W4377047699 date "2023-05-01" @default.
- W4377047699 modified "2023-10-16" @default.
- W4377047699 title "Investigation of the Amplified Spontaneous Emission Threshold of Cesium Lead Bromide Perovskite Quantum Dots at Different Excitation Wavelengths" @default.
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- W4377047699 doi "https://doi.org/10.1149/2162-8777/acd6bc" @default.
- W4377047699 hasPublicationYear "2023" @default.
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