Temperature-dependent photoluminescence and third-order nonlinear optical properties of Mn2+doped CsPbCl3 nanocrystals

In this work, CsPbCl3 and Mn:CsPbCl3 nanocrystals (NCs) were synthesized by a facile hot-injection method. In X-ray photoelectron spectroscopy test, the existence of Cs, Mn, Pb, Cl elements was confirmed, indicating that Mn2+ was successfully doped into CsPbCl3 NCs. The pure CsPbCl3 and Mn:CsPbCl3 NCs were studied by temperature dependent photoluminescence (PL) spectroscopy. It was found that Mn:CsPbCl3 NCs had higher exciton binding energy, which indicated that Mn:CsPbCl3 NCs may have stronger ability of third-order nonlinear optical effect. Furthermore, closed-aperture (CA) and open-aperture (OA) Z-scan tests were carried out on CsPbCl3 and Mn: CsPbCl3 NCs. CA Z-scan test found that they are all self-focusing media. OA Z-scan test found that Mn:CsPbCl3 NCs has a higher two-photon absorption coefficient, which is-4.5 times higher than that of pure CsPbCl3 NCs.

Automated summary

CsPbCl3 and Mn:CsPbCl3 nanocrystals were synthesized using a simple hot-injection method. X-ray photoelectron spectroscopy confirmed the presence of Cs, Mn, Pb, and Cl elements, indicating successful doping of Mn2+ into CsPbCl3 nanocrystals. Temperature-dependent photoluminescence spectroscopy showed that Mn:CsPbCl3 nanocrystals had a higher exciton binding energy, suggesting a stronger third-order nonlinear optical effect. Closed-aperture and open-aperture Z-scan tests revealed that both CsPbCl3 and Mn:CsPbCl3 nanocrystals were self-focusing media. The open-aperture Z-scan test showed that Mn:CsPbCl3 nanocrystals had a higher two-photon absorption coefficient, 4.5 times higher than that of pure CsPbCl3 nanocrystals.