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Nano Convergence
Fig. 4 | Nano Convergence

Fig. 4

From: How to improve the structural stabilities of halide perovskite quantum dots: review of various strategies to enhance the structural stabilities of halide perovskite quantum dots

Fig. 4

Copyright 2017, Wiley–VCH

DFT calculations, thermal stabilities and bandgap engineering of metal doped PQDs. a Calculated and normalized bandgap (Eg) of CsPbBr3 QDs with and without defects. b Calculated diffusion barrier energy of VBr as diffusion paths. Thermal stabilities of (c) CsPbBr3 QDs and (d) Na+ doped CsPbBr3 QDs in seven thermal cycling measurements. The insets show photographs of the two samples under UV irradiation before and after the seven thermal cycling measurements. Reproduced with permission from [80] Copyright 2019, American Chemical Society. e PL spectra of Al3+ doped and undoped CsPbBr3 and CsPb(Br/I)3 QDs. Insets are photographs of the sample under UV excitation. f Schematics showing the Al bound to CsPbBr3 or CsPb(Br/I)3 lattice constituents in cluster form. Reproduced with permission from [90].

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