Modifying the optical emission of two-dimensional Ruddlesden-Popper perovskites by laser irradiation

Yang, Jiaxin; Chen, Junying; Lin, Zhenxu; Lan, Sheng

doi:10.1016/j.apsusc.2022.154849

Cited by 3 publications

(3 citation statements)

References 35 publications

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“…The layer number ( n ) determines the band gap, exciton binding energy, absorption/emission characteristics, and carrier lifetime of 2D perovskites. − These properties facilitate the broad application of 2D lead halide perovskites in optoelectronic devices, including solar cells, photodetectors, , light-emitting diodes, and field effect transistors . Furthermore, introducing halide ion substitutions or mixtures offers an additional route to adjust the band gap of both 2D and 3D halide perovskite materials. − However, due to the partial replacement of iodine (I) ions by bromine (Br) ions, the migration of ions in halide perovskites poses challenges to stabilizing the performance of perovskite-based optical devices. − …”

Section: Introductionmentioning

confidence: 99%

Vertical Halide Segregation and Stability of Two-Dimensional Layered Perovskite Nanostructures: Implications for Optoelectronic Devices

Qi,

Yang,

Wang

et al. 2023

ACS Appl. Nano Mater.

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Two-dimensional (2D) layered perovskites have garnered widespread attention due to their exceptional environmental stability and adaptable optical properties. However, quasi-2D layered perovskites typically undergo ion migration and phase segregation when illuminated, presenting a significant challenge in achieving stable optoelectronic devices. In this study, we employ time-dependent photoluminescence spectroscopy to investigate the photoinduced phase segregation of 2D perovskites and to explore the dependence of film stability on perovskite phases. Our results reveal that phase segregation is more likely to occur at the top side (film/air interface) than at the bottom side (film/substrate interface) of the 2D mixed halide perovskite film. We attribute this phenomenon to the 3D perovskite phase located at the top side of the film, which promotes the phase segregation, while the formation of the small-n phase at the bottom side inhibits the photoinduced phase segregation. The vertical alignment of different phases has a decisive effect on photoinduced phase segregation and, therefore, on the vertical stability of the film. These findings provide guidelines for optimizing the vertical stability of 2D mixed halide perovskite structures toward high-performance optoelectronics.

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Section: Introductionmentioning

confidence: 99%

Vertical Halide Segregation and Stability of Two-Dimensional Layered Perovskite Nanostructures: Implications for Optoelectronic Devices

Qi,

Yang,

Wang

et al. 2023

ACS Appl. Nano Mater.

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“…We think that large electric field enhancement achieved in the particle-on-film system is responsible for the ultralow threshold observed in this work. Previously, it was found that a SiO 2 microsphere placed on a perovskite film acts as a focusing lens, which provides a greatly enhanced electric field at the contact point between the microsphere and the film . In order to gain a deep insight into the underlying physical mechanism, we have calculated numerically the electric field distribution in the cross-section of the particle-on-film system formed on a Ag/SiO 2 substrate, which was excited by a plane wave, at the excitation wavelength (325 nm) (see Figure S8, Supporting Information).…”

mentioning

confidence: 99%

“…Previously, it was found that a SiO 2 microsphere placed on a perovskite film acts as a focusing lens, which provides a greatly enhanced electric field at the contact point between the microsphere and the film. 37 In order to gain a deep insight into the underlying physical mechanism, we have calculated numerically the electric field distribution in the cross-section of the particle-on-film system formed on a Ag/SiO 2 substrate, which was excited by a plane wave, at the excitation wavelength (325 nm) (see Figure S8, Supporting Information). It was found that the laser beam can be tightly focused onto the SiN x /CsPbBr 3 composite film by the SiO 2 microsphere.…”

mentioning

confidence: 99%

Ultralow Threshold Lasing from a Continuous-Wave-Pumped SiN_x/CsPbBr₃/Ag Thin Film Mediated by the Whispering Gallery Modes of a SiO₂ Microsphere

Lin

Huang

et al. 2022

J. Phys. Chem. Lett.

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Thin-film pervoskite lasers driven by a continuous wave (CW) laser with ultralow thresholds, which is crucial for the development of on-chip electrically driven lasers, have not yet been realized owing to the low excitation power density of the CW laser. Here, we reported the CW-laser-pumped lasing from a thin film of CsPbBr3 quantum dots (QDs) sandwiched by a SiN x and a Ag thin film and mediated by the whispering gallery modes of a SiO2 microsphere. The stable photoluminescence from CsPbBr3 QDs with a quantum efficiency of ∼45% is realized by encapsulating with a thin SiN x film. Upon CW-laser pumping, lasing from the whispering gallery modes with a threshold of ∼11.6 W/cm2 is successfully demonstrated at room temperature. The strong localization of electric field achieved in the particle-on-film system, which is revealed in the numerical simulations and lifetime measurements, plays a crucial role in the realization of the ultralow threshold lasing. Our findings open a new avenue for designing photostable CW-laser-pumped pervoskite lasers.

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The Interaction of Femtosecond Laser with Perovskites for Advanced Photonics

Xu,

Man,

et al. 2024

Advanced Photonics Research

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Halide perovskites have attracted increasingly attention as “rising star” materials for advanced photonics and optoelectronics. Construction micro‐/nano‐architecture of perovskites will provide a good platform to investigate and optimize the fundamental photon–matter–structure interaction. It will also improve the properties, pixelate and miniaturize the integration of versatile optoelectronic devices for emerging applications. In this regard, femtosecond (fs) laser processing technique has been widely used to fabricate micro‐/nano‐architecture with high spatial resolution, limitless flexibility, and unrestricted three‐dimensional structuring capability at a large‐scale, low‐cost way. Concurrently, it is reported that the high refractive index, low thermal conductivity and ultrafast thermalization rate of perovskites are beneficial for the processing by fs laser into micro‐/nano‐architecture without the degradation of their optoelectronic properties. This review systematically summarizes the interaction of fs laser with perovskites, including the mechanisms, and phenomena. Besides the traditional optoelectronics and applications of halide perovskites, the novel properties and applications from optical structures generated by fs laser processing of perovskites are also discussed. The challenges and outlooks for fs laser processed perovskite materials and devices are highlighted. This review will promote the relevant fundamental research on light–matter–structure interaction, and facilitate the integration of perovskite micro‐/nano‐architecture‐based optoelectronic devices.

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Modifying the optical emission of two-dimensional Ruddlesden-Popper perovskites by laser irradiation

Cited by 3 publications

References 35 publications

Vertical Halide Segregation and Stability of Two-Dimensional Layered Perovskite Nanostructures: Implications for Optoelectronic Devices

Vertical Halide Segregation and Stability of Two-Dimensional Layered Perovskite Nanostructures: Implications for Optoelectronic Devices

Ultralow Threshold Lasing from a Continuous-Wave-Pumped SiN_x/CsPbBr₃/Ag Thin Film Mediated by the Whispering Gallery Modes of a SiO₂ Microsphere

The Interaction of Femtosecond Laser with Perovskites for Advanced Photonics

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Modifying the optical emission of two-dimensional Ruddlesden-Popper perovskites by laser irradiation

Cited by 3 publications

References 35 publications

Vertical Halide Segregation and Stability of Two-Dimensional Layered Perovskite Nanostructures: Implications for Optoelectronic Devices

Vertical Halide Segregation and Stability of Two-Dimensional Layered Perovskite Nanostructures: Implications for Optoelectronic Devices

Ultralow Threshold Lasing from a Continuous-Wave-Pumped SiNx/CsPbBr3/Ag Thin Film Mediated by the Whispering Gallery Modes of a SiO2 Microsphere

The Interaction of Femtosecond Laser with Perovskites for Advanced Photonics

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Ultralow Threshold Lasing from a Continuous-Wave-Pumped SiN_x/CsPbBr₃/Ag Thin Film Mediated by the Whispering Gallery Modes of a SiO₂ Microsphere