Tailoring perovskite quantum dots heterojunction nanocomposite toward photocatalytic reduction of CO2

Huang, Wenxuan; Zhu, Qiliang; Zhu, Yihua; Chen, Cheng; Shen, Jianhua

doi:10.1016/j.mtener.2023.101458

Cited by 2 publications

(2 citation statements)

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“…Metal halide perovskites (MHPs) are widely embraced for their outstanding optoelectronic properties, finding applications in photovoltaics, 1,2 light-emitting diodes (LEDs), 3,4 photodetectors, 5 fluorescence imaging, 6 and photocatalysis data memories et al 7,8 However, the environmental concerns associated with Pb-based halide perovskites have underscored the need for research on Pb-free alternatives. 9−12 Among these, Sn-based halide perovskites have gained interest by reason for their similarities with Pb in various aspects.…”

Section: Introductionmentioning

confidence: 99%

“…Metal halide perovskites (MHPs) are widely embraced for their outstanding optoelectronic properties, finding applications in photovoltaics, , light-emitting diodes (LEDs), , photodetectors, fluorescence imaging, and photocatalysis data memories et al , However, the environmental concerns associated with Pb-based halide perovskites have underscored the need for research on Pb-free alternatives. − Among these, Sn-based halide perovskites have gained interest by reason for their similarities with Pb in various aspects. − Despite their promising features, MHPs face challenges in stability due to their inherent ionic structural properties, rendering them vulnerable to external factors like solvents, ultraviolet (UV) rays, temperature, humidity, and electric fields. This limitation significantly impacts the practical utilization of MHPs. , …”

Section: Introductionmentioning

confidence: 99%

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Surface Ligand Engineering to Modulate the Synthesis of DJ-Type 2D Sn-Based Perovskites for Light-Emitting Diodes

Huang,

Hou,

Zhu

et al. 2024

J. Phys. Chem. C

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The advancement of novel lead-free and stable metal halide perovskites is crucial in addressing the environmental risks associated with lead-based perovskites and broadening their range of applications. Two-dimensional (2D) Sn-based perovskites have been increasingly recognized for their outstanding optoelectronic properties and notable stability. In this study, we have successfully synthesized three variants of Dion−Jacobson (DJ)-type 2D Sn-based perovskites (H 3 NC n H 2n NH 3 )SnBr 4 through surface ligand modification using 1,6-diaminohexane (C6), 1,8-octanediamine (C8), and 1,10-decanediamine (C10). C6SnBr 4 exhibits an exceptionally high absolute photoluminescence quantum yield (PLQY) of up to 95%. Analysis of low-temperature PL spectra sheds light on the luminescence mechanism of C6SnBr 4 , emphasizing the interaction between band-edge emission and self-trapped state emission. Density functional theory (DFT) calculations reveal a bandgap (E g ) of 2.07 eV for C6SnBr 4 , consistent with experimental findings. Furthermore, the monochromatic phosphor-converted light-emitting diode (LED) incorporating C6SnBr 4 displays a correlated color temperature (CCT) of 2483 K, emitting a vibrant yellow-orange hue with a color rendering index (R a ) of 47.7, and CIE color coordinates of (0.514, 0.471). These findings offer valuable insights for enhancing the absolute PLQY and stability of DJ-type 2D Sn-based perovskites.

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