Self‐Powered Perovskite/Si Bipolar Response Photodetector for Visible and Near‐Infrared Dual‐Band Imaging and Secure Optical Communication

Laser & Photonics Review, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 4, 2024

Abstract Vertically stacked wavelength modulation bipolar response photodetectors are expected to be applied in various fields because they enable detection and transmission within one device do not require harsh operating conditions. However, the as‐reported devices either need change mode (flipping or applying external bias) have limited application effects. In this study, a self‐powered FAPbI 3 /silicon hybrid visible near‐infrared photodetector is reported, tuned by controlling transmittance interface contact of transparent electrodes. Moreover, unlike for photosensitive layers such as perovskites organic compounds, preparation electrodes does involve solvents, array with different can prepared microregions without affecting adjacent regions. Then, an encrypted communication system that requires comprehensive consideration positive negative states electrode‐based caused 650‐nm 940‐nm signals designed, increasing difficulty decryption. A dual‐band spectral imaging additional voltage driving combining reflection light penetration ability implemented, ensuring miniaturization high integration visual system.

Language: Английский

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A dual-channel detection mode ZnO/organic polymer/Cu₂O heterojunction dual-band photodetector

Journal of Materials Chemistry A, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

A dual-channel detection mode photodetector is reported, and the response spectrum can be switched under different bias modulation.

Language: Английский

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Bipolar-Response Perovskite Photodetector Controlled by the Ferroelectric Depolarization Field for Secure Optical Communication

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: March 6, 2025

Traditional optical communication systems are constrained by fixed photoresponse values and light intensity, significantly impairing the potential for data transmission protection. Here, a single-band bipolar-response perovskite self-powered photodetector is demonstrated on (PEA)2PbI4/BaTiO3/Si heterojunction. By employing BaTiO3 as intrinsic layer, device demonstrates low dark current order of 10-12 A at 5 V bias. When functions ferroelectric variation in depolarization field not only achieves multilevel modulation magnitude but also reverses sign. Leveraging bipolar characteristics device, secure system has been developed, featuring dual-channel signal reception specifically designed information transmission. One channel designated receiving encrypted information, while other receives key information. The needs to identify positive negative input signals with arbitrary intensity without distinguishing strength values. accurate retrieval transmitted contingent upon application an encryption algorithm, thereby enhancing security system. This work provides novel perspectives realization more reliable systems.

Language: Английский

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Vertical Pyro‐Phototronic Effect and Lateral Photothermoelectric Effect in Perovskite Single Crystals‐Based Photodetector for Narrowband and Broadband Dual‐Modal Optical Communications

Laser & Photonics Review, Journal Year: 2025, Volume and Issue: unknown

Published: April 10, 2025

Abstract Creating dual‐modal metal halide perovskite (MHP)‐based photodetectors (PDs) capable of working in either broadband or narrowband modes would enhance optical communication systems. However, challenges such as complex fabrication, and limited detection range (<900 nm) still exist. Herein, self‐powered, PDs‐based on MHPs are demonstrated, which integrate vertical interfacial pyro‐phototronic effect (IPPE) lateral photothermoelectric (PTEE), via doping these crystals with Ag+ integrating wide spectrum absorber. The high‐performance photodetection results from charge collection narrowing (CCN)‐assisted IPPE, enabling light specific wavelength to penetrate into the interface, high carrier separation efficiency temperature rise. In PD, metamaterial absorbers counter electrodes improved photothermal conversion expanded absorption, achieving ultra‐broadband responses 360 2200 nm. By changing type MHP single (SCs), response band PD can be modulated purple red light, while maintaining capability. is fully used achieve double encryption during signal transmission. work offers a promising approach for designing multi‐modal PDs wireless data security, applicable imaging, biomedical, intelligent sensing.

Language: Английский

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Broadband synaptic photoresponse induced by the charged planar Te interlayer in epitaxial Te/GaN hybrid-heterojunction

Applied Surface Science, Journal Year: 2025, Volume and Issue: unknown, P. 163492 - 163492

Published: May 1, 2025

Language: Английский

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Dual narrowband photodetectors based on halide perovskite single crystal heterojunctions with solution-processed epitaxial growth

Journal of Materials Chemistry C, Journal Year: 2024, Volume and Issue: 12(33), P. 12806 - 12817

Published: Jan. 1, 2024

The figure illustrates the main device structure discussed in paper, incident direction of light, and distribution electric field intensity.

Language: Английский

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Trivalent Rare Earth Ion‐Doped Metal Halide Perovskite Near‐Infrared Semiconductors for High‐Performance Optoelectronic Devices

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

Published: Dec. 17, 2024

Abstract Given the extensive application of near‐infrared (NIR) emission, quest for efficient and versatile NIR semiconductors have attracted tremendous attention. Leveraging trivalent rare earth (RE 3+ ) ions doping, integration metal halide perovskites with RE makes it easy to achieve NIR‐II emission (1000–1700 nm). However, although showing promise in bioimaging, optical communication, night vision, enhancing intensity promote further progress real‐world applications remains a challenge. This review summarizes recent advancements ion‐doped perovskite semiconductors, discusses what kind properties are needed how desired various applications. The starts synthesis methods material types rich examples. Following this, mechanisms strategies optimizing luminescence performance discussed detail. Furthermore, highlights their multifunctional both as an electrically driven emitter light‐emitting diodes (LEDs) down‐conversion photovoltaic devices (PVs) or phosphor‐converted LEDs (pc‐LEDs). Finally, insights on fill gap between current research future goals provided. aims provide deeper understanding materials, exploration emitters.

Language: Английский

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Enabling Lignocellulose-Sourced Feedstocks to Fabricate Optical Filters with Desired Blocking Wavelength

Biomacromolecules, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 16, 2024

Near-infrared (NIR) filters have broad applications in fields such as information safety and privacy protection environmental monitoring. Traditional NIR primarily rely on complex optical designs environmentally unfriendly substrates, while lignocellulose-sourced do not achieve the desired blocking wavelength therefore face challenges various application conditions. In this study, we propose a thickness adjustment strategy to precisely control of filters. The obtained with tailored exhibited selective visible region (400-650 nm) well high transmittance (over 90%) ultralow haze at 1400 nm. Given their transmittance, these bioselectors demonstrate potential fields, data security protection, presenting promising advancement next-generation sustainable materials fabricated from all-lignocellulose feedstocks.

Language: Английский

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