Achieving Ultra‐Low Dark Current in β‐Ga₂O₃ Photoconductive Photodetectors for Anti‐Interference Optical Human–Machine Interaction Systems via Gallium Interstitials Engineering

Small, Journal Year: 2025, Volume and Issue: unknown

Published: April 21, 2025

Abstract Driven by the demand for high‐throughput data transmission, development of cost‐effective and highly sensitive photoconductive photodetectors has become imperative to advance optical communication systems, thereby playing a crucial role in realm human–machine interaction. This study presents β‐Ga 2 O 3 photodetector employed an anti‐interference interaction system that demonstrates superior responsivity minimized dark current, attributed strategic modulation intrinsic defects. Through first‐principles simulations, defect dynamics across various growth conditions are systematically elucidated, enabling precise synthesis films with markedly diminished shallow‐donor gallium interstitials. A super low current 4.15 × 10 −12 is achieved even under 40 V bias, accompanied high 2.26 A·W −1 detectivity realizing 1.14 14 Jones. Ultimately, systems robot arm control, which enables demonstrate excellent resistance random noise, facilitates integration more efficient algorithms. Consequently, achieves 88.46% reduction reading time 78.17% required storage space, demonstrating substantial potential cost‐effective, era Internet Things.

Language: Английский

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Bulk anomalous photovoltaic induced pyro-phototronic effect in lead-free chiral perovskite for enhanced self-powered photodetection

Chinese Chemical Letters, Journal Year: 2025, Volume and Issue: unknown, P. 111268 - 111268

Published: April 1, 2025

Language: Английский

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A Novel Pathogen Detection System Combining a Nucleic Acid Extraction Biochip with a Perovskite Photodetector

Micromachines, Journal Year: 2025, Volume and Issue: 16(5), P. 581 - 581

Published: May 15, 2025

The increasing spread of infectious diseases caused by pathogenic microorganisms underscores the urgent need for highly sensitive, portable, and rapid nucleic acid detection technologies to facilitate early diagnosis effective prevention. In this study, we developed a fluorescence-based platform that integrates microfluidic chip with an all-inorganic perovskite photodetector. system enables integrated operation extraction, purification, amplification on chip, combined real-time electrical signal readout via CsPbBr3 Experimental results indicate photodetector exhibits high responsivity at 530 nm, aligning well primary emission peak FAM. demonstrates strong linear correlation between photocurrent FAM concentration over range 0.01–0.4 μM (R2 = 0.928), low limit 0.01 excellent reproducibility across multiple measurements. Validation using standard solutions Escherichia coli samples confirmed system’s reliable linearity stability. This potential pathogen screening point-of-care diagnostic applications.

Language: Английский

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Quasi‐CW Amplified Spontaneous Emission in Air‐Processed Quasi‐2D Perovskite Thin Films with High Stability

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(23)

Published: Jan. 18, 2024

Abstract Due to the hydrophobic organic cations, quasi‐two‐dimensional (quasi‐2D) lead halide perovskite materials have shown better moisture resistance. However, inappropriate multiphase structure in quasi‐2D films seriously affects efficient transport of energy from low‐n domains high‐n domains, especially when prepared air. Herein, study develops 30% ± 10% humidity and studies their amplified spontaneous emission (ASE) properties. It can be seen that phase disproportionation air is greatly suppressed by manipulating crystallization kinetics via using additive benzimidazole (BI), thereby enabling a narrowed distribution. improvement transfer efficiency, surface roughness, stability, ASE with low threshold 13.4 µJ cm −2 realized under quasi‐continuous pumping condition, which significantly <28.8 pristine film. Furthermore, introduction BI enhanced number peak intensity half‐decay pulses as high 5.6 × 10 7 , indicating good operating stability BI‐treated films. This work suggests provide possibility for preparing high‐performance lasers

Language: Английский

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CVD‐Synthesized CsAg₂I₃ Single Crystals toward Polarization UV Photodetection and Anti‐Counterfeiting Identification

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 30, 2024

Abstract Low‐dimensional ternary silver halide (CsAg 2 I 3 ), an emerging inorganic lead‐free perovskite, has garnered significant scientific attention due to its strong quantum confinement effects, wide bandgaps, non‐toxicity, and others. However, the photophysical properties optoelectronic performance of CsAg materials devices are significantly compromised by crystal quality defects arising from liquid‐phase preparation. Herein, 1D single crystals newly grown chemical vapor deposition method reported. These display exceptional stability over a 3‐month period despite exposure air moisture. The high in‐plane anisotropic structure, phonon vibrations, refractive index also experimentally elucidated. Polarization‐sensitive ultraviolet photodetector based on monocrystal features responsivity 139 mA W −1 , specific detectivity 1.05 × 10 11 cm Hz 1/2 ultra‐fast photoresponse speed 48.2/69.1 µs, dichroic ratio 2.66 upon 360 nm irradiation at −5.0 V bias. excels amongst competitors, moving toward potential application rapid optical anti‐counterfeiting identification. This work, which leverages high‐crystalline highly stable monocrystals, holds promises for advancing this functional material into robust next‐generation capable probing sensitive sensing azimuth recognition.

Language: Английский

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Molecularly Crowding Electrolytes and Tailored Electrodes for High-performance Aqueous Mn-Ion Hybrid Micro-supercapacitors

Nano Energy, Journal Year: 2024, Volume and Issue: unknown, P. 110610 - 110610

Published: Dec. 1, 2024

Language: Английский

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Emerging Computational Micro‐Spectrometers — From Complex System Integration to Simple In Situ Modulation

Small Methods, Journal Year: 2023, Volume and Issue: 7(11)

Published: Aug. 31, 2023

Abstract The extensive applications of spectrum analysis across various fields have rendered the traditional desktop spectrometers unable to meet market demand for portability and instantaneity. Reducing size has become a topic interest. Based on this trend, novel type computational spectrometer is developed been widely studied owing its unique features. Such do not need integrate complex mechanical or optical structures, most them can achieve by properties material itself combines with reconstruction algorithm. Impressively, single‐detector recently successfully realized based in situ modulation properties. This only enables further miniaturization device, but also means that footprint‐resolution limitation which always existed field hyperspectral imaging broken, opening new era image analysis. review summarizes classifications principles spectrometers, compares resolution performances different types highlights progress especially revolutionary spectrometer. It expected will provide positive impact expanding boundary move forward.

Language: Английский

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High-on/off ratio organic photodetectors via incorporating Kaolinite

Micro and Nanostructures, Journal Year: 2024, Volume and Issue: 193, P. 207914 - 207914

Published: June 15, 2024

Language: Английский

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In Situ Growth of MoS₂ Onto Co‐Based MOF Derivatives Toward High‐Efficiency Quantum Dot‐Sensitized Solar Cells

Advanced Science, Journal Year: 2024, Volume and Issue: 11(42)

Published: Sept. 16, 2024

Abstract Quantum dot sensitized solar cells (QDSCs) represent a promising third‐generation photovoltaic technology, boasting high theoretical efficiency of 44% and cost efficiency. However, their practical is constrained by reduced photovoltage ( V oc ) fill factor (FF). One primary reason the inefficient charge transfer elevated recombination rates at counter electrode (CE). In this work, novel CE composed titanium mesh loaded with Co,N─C@MoS 2 introduced for assembly QDSCs. The incorporation nanosized MoS enhances density catalytic sites, while Co,N─C component ensures conductivity provides substantial active surface area. Additionally, mesh's 3D structure serves as an effective electrical conduit, facilitating rapid electron from external circuit to composite. These improvements in activity, rate, stability significantly enhance performance optimized achieve groundbreaking power conversion (PCE) 16.39%, accompanied short‐circuit current J sc 27.26 mA cm −2 , 0.818 V, FF 0.735. results not only offer new strategy designing electrodes activity but also underscore application composite enhancing QDSC technology.

Language: Английский

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High-Performance, Flexible Perovskite Photodetector Based on CsPbBr₃ Nanonet

IEEE Transactions on Electron Devices, Journal Year: 2023, Volume and Issue: 70(12), P. 6435 - 6438

Published: Oct. 31, 2023

By the assistance of single-layer polystyrene (PS) spheres, high-quality CsPbBr3 perovskite nanonet films are fabricated for construction flexible, self-powered photodetectors (PDs) with an ITO/SnO2/CsPbBr3/carbon structure. The flexible PDs exhibit superior device performances ON- OFF ratio approximately 2.58 $\times \,\,10^{{4}}$ , a linear dynamic range 102 dB, and responsivity (R) detectivity ( notation="LaTeX">$\text{D}^{\ast }$ ) values 0.15 A/W 3.70 \,\,10^{{11}}$ Jones, respectively. Moreover, our displays good light stability after 500 times bending. These results show reference value fabricating stable PDs.

Language: Английский

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