Liquid-metal-assisted exfoliation of 2D β-Ga2O3 with high anisotropy ratio for solar-blind detection and polarization imaging DOI

Wen‐De Zhong,

Hong Huang, Yuqing Liu

и другие.

Applied Physics Reviews, Год журнала: 2025, Номер 12(1)

Опубликована: Март 1, 2025

Solar-blind UV polarization detection and imaging can reflect more detailed optical information, which is vital for developing next-generation deep optoelectronic devices. β-Ga2O3 with ultra-wide bandgap an ideal candidate solar-blind application. However, the bulky nature of Ga2O3 limits its application in miniaturized, integrated multifunctional devices, based on photodetector has not yet been realized. Here, we report a convenient method to prepare 2D flakes via liquid-metal-assisted exfoliation. Benefiting from high crystallinity polarization-sensitive absorption prepared ultrathin flake monoclinic structure, exhibits ultra-fast response speed (100/78 μs rise/decay time) prominent anisotropy ratio (∼2.8) photoresponse under 265 nm illumination. An unambiguous linearly polarized light also realized by double symmetry-breaking twisted photodetectors. Moreover, four-layer twistedly stacked system further enables one-step well-defined resolution (150 × 150 pixels) acquire spatial information. This work presents novel strategy preparing gallium oxides demonstrates promising route realize simple manner.

Язык: Английский

2D Perovskite Heterojunction‐Based Self‐Powered Polarized Photodetectors with Controllable Polarization Ratio Enabled by Ferro‐Pyro‐Phototronic Effect DOI Creative Commons
Xiaoran Yang, Binbin Zhou, Min Guo

и другие.

Advanced Science, Год журнала: 2025, Номер unknown

Опубликована: Янв. 22, 2025

Abstract Metal halide perovskites (MHPs) are commonly used in polarization‐sensitive photodetectors (PDs) for applications such as polarization imaging, remote sensing, and optical communication. Although various methods exist to adjust the photocurrent, a universal effective approach continuous control of MHPs’ optoelectronic polarized properties is lacking. A strategy electrically modulate ratio (PR) self‐powered PDs using ferro‐pyro‐phototronic effect (FPPE) 2D presented. By varying amplitude direction ferroelectric voltage, built‐in electric field heterojunction can be modulated, allowing controllable PR regulation adjustable characteristics. Moreover, pyroelectric photoresponses realized, significantly enhancing responsivity, response speed PDs. Both currents photocurrents exhibit obvious This method's versatility demonstrated by creating three additional quasi‐2D MHP ferroelectric‐based polarized‐sensitive proof‐of‐concept encrypted communication achieved UV‐sensitive light‐sensing units. These findings highlight FPPE's potential enhance device control, enabling high‐performance photodetection.

Язык: Английский

Процитировано

1
Polarized UV–Visible Photoluminescence from Bulk β‐Ga2O3 Crystals DOI Open Access
K.P. Korona, J. Fink‐Finowicki, Aliaksei Bohdan

и другие.

physica status solidi (b), Год журнала: 2025, Номер unknown

Опубликована: Янв. 8, 2025

Herein, a study of photoluminescence (PL) bulk β ‐Ga 2 O 3 crystals measured at different crystallographic directions is presented. The are grown using the optical floating zone method and cut to prepare three basic planes for investigations. Ga emits PL from red (1.7 eV) near UV (3.5 eV). maximum about eV. It shown that excitation depends on polarization: lowest energy 4.7 eV observed polarization along b axis. emission clearly polarized, which can be used build diodes emitting polarized light: light‐emitting diodes. For example, main (100) plane [001] direction. Analysis dynamics shows band composed few spectrally overlapping luminescence bands. bands resolved thanks significantly dynamics. violet 3.0 has lifetime τ = 0.6 μs blue 2.8 600 μs. Such long lifetimes characteristic deep centers, oxygen vacancy V or –Ga i –V defect.

Язык: Английский

Процитировано

0
Liquid-metal-assisted exfoliation of 2D β-Ga2O3 with high anisotropy ratio for solar-blind detection and polarization imaging DOI

Wen‐De Zhong,

Hong Huang, Yuqing Liu

и другие.

Applied Physics Reviews, Год журнала: 2025, Номер 12(1)

Опубликована: Март 1, 2025

Solar-blind UV polarization detection and imaging can reflect more detailed optical information, which is vital for developing next-generation deep optoelectronic devices. β-Ga2O3 with ultra-wide bandgap an ideal candidate solar-blind application. However, the bulky nature of Ga2O3 limits its application in miniaturized, integrated multifunctional devices, based on photodetector has not yet been realized. Here, we report a convenient method to prepare 2D flakes via liquid-metal-assisted exfoliation. Benefiting from high crystallinity polarization-sensitive absorption prepared ultrathin flake monoclinic structure, exhibits ultra-fast response speed (100/78 μs rise/decay time) prominent anisotropy ratio (∼2.8) photoresponse under 265 nm illumination. An unambiguous linearly polarized light also realized by double symmetry-breaking twisted photodetectors. Moreover, four-layer twistedly stacked system further enables one-step well-defined resolution (150 × 150 pixels) acquire spatial information. This work presents novel strategy preparing gallium oxides demonstrates promising route realize simple manner.

Язык: Английский

Процитировано

0