Sensitive short-wavelength infrared photodetection with a quinoidal ultralow band-gap n-type organic semiconductor

Chem, Journal Year: 2024, Volume and Issue: 10(5), P. 1425 - 1444

Published: Jan. 25, 2024

Language: Английский

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A narrow-bandgap photothermal material based on a donor–acceptor structure for the solar–thermal conversion application

Journal of Materials Chemistry A, Journal Year: 2023, Volume and Issue: 11(28), P. 15380 - 15388

Published: Jan. 1, 2023

Organic photothermal materials can effectively convert solar energy into thermal in an environmentally friendly manner and have great potential for applications such as desalination thermoelectric power generation.

Language: Английский

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Sensitive SWIR Organic Photodetectors with Spectral Response Reaching 1.5 µm

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(41)

Published: Aug. 17, 2024

Abstract The performance of organic photodetectors (OPDs) sensitive to the short‐wavelength infrared (SWIR) light lags behind commercial indium gallium arsenide (InGaAs) primarily due scarcity semiconductors with efficient photoelectric responses exceeding 1.3 µm. Limited by Energy‐gap law, ultralow‐bandgap usually suffer from severe non‐radiative transitions, resulting in low external quantum efficiency (EQE). Herein, a difluoro‐substituted quinoid terminal group (QC‐2F) exceptionally strong electron‐negativity is developed for constructing new non‐fullerene acceptor (NFA), Y‐QC4F an ultralow bandgap 0.83 eV. This subtle structural modification significantly enhances intermolecular packing order and density, enabling absorption onset up 1.5 µm while suppressing non‐radiation recombination films. SWIR OPDs based on achieve impressive detectivity ( D *) over 10 11 Jones 0.4 under 0 V bias, maximum 1.68 × 12 at 1.16 Furthermore, demonstrate competitive high‐quality imaging even 1.4 irradiation.

Language: Английский

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Flexible near-infrared organic photodetectors for emergent wearable applications

Wearable electronics., Journal Year: 2024, Volume and Issue: 1, P. 53 - 77

Published: May 13, 2024

With the evolution of Industry 4.0, next-generation wearable devices have come under spotlight, where organic electronics are playing an important role due to their flexible form factor, high performance, and integration capability. Designed conform soft dynamic surfaces, photodetectors (OPDs) integrated arrays stand out for application potential in non-invasive biosensing bio-imaging, with inherent advantages mitigating motion artifacts – a notable limitation traditional, rigid photodetector systems. Leveraging near-infrared (NIR) spectrum's capability deep skin penetration minimal scattering human tissues, NIR OPDs especially capable precise diagnostics enhanced signal quality. The adaptable factor further broadens applications human-environment interaction, marking shift towards more responsive intelligent technologies. This review summarizes latest challenges breakthroughs OPDs, emphasizing effective strategies toward high-performance device units We discuss remaining outlook on vast reshaping our interaction surroundings.

Language: Английский

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Alcohol‐Soluble n‐Type Polythiophenes as Cathode Interlayer in Organic Photodetectors for Hole Blocking

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(24)

Published: Feb. 7, 2024

Abstract For organic photodetectors (OPDs), cathode interlayer (CIL) with low‐lying highest occupied molecular orbital ( E HOMO ) energy level is required to reduce dark current density J d ). In this study, toward application as CIL in OPDs, an alcohol‐processable n‐type conjugated polymer (n‐PT8) based on imide/cyano‐substituted polythiophene backbone and branched oligo(ethylene glycol) side chain developed. Owing the electron‐accepting imide/cyano groups backbone, n‐PT8 exhibits deep‐lying of −5.80 eV a high conductivity 5.12 × 10 −6 S cm −1 . OPD one order magnitude lower than that state‐of‐the‐art material because large barrier for reverse hole injection. Moreover, device performance insensitive layer thickness, which very desirable mass production OPDs. The near‐infrared (NIR) OPDs exhibit ultra‐low 1.76 −9 A −2 specific detectivity 2.88 12 Hz 1/2 W at V. To best knowledge, first report derivatives opto‐electronic devices.

Language: Английский

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Near-Infrared Organic Photodetectors with Spectral Response over 1200 nm Adopting a Thieno[3,4-c]thiadiazole-Based Acceptor

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(7), P. 9088 - 9097

Published: Feb. 6, 2024

The nonclassical ten-pi-electron 5,5-fused thieno[3,4-

Language: Английский

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Intrinsically Stretchable Organic Photodiodes for Faint Near‐Infrared Light Detection and Extendable Cryptographic Imaging

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(40)

Published: April 23, 2024

Abstract Skin‐like optoelectronic devices have progressed in leaps and bounds, permitting considerable applications such as remote medical diagnosis, optical communication, biometric authentication, 3D vision imaging. However, achieving extendable imaging frontier detectors poses a formidable challenge for stretchable electronic materials remains largely unexplored. Herein, an ultrasensitive intrinsically organic photodiode is configured by the spatially modularizable‐assembled elastic photoactive film faint near‐infrared light detection The performance metrics of photodiodes rival that commercial photodetectors, including high specific detectivity ( D * noise ) over 10 12 Jones at 850 nm, ultralow current 4.1 × −15 A Hz −1/2 stretchability up to 100%. Furthermore, it first time simultaneously achieve cryptographic stable photoplethysmography signal based on photodiodes. These results signify significant advancement toward enabling practical scenarios optoelectronics.

Language: Английский

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Design of low-cost non-fused ultranarrow-band-gap acceptors for versatile photovoltaic applications

Joule, Journal Year: 2024, Volume and Issue: 8(8), P. 2238 - 2249

Published: June 13, 2024

Language: Английский

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Manipulating electron linking units and side chains for high-performance all-polymer photodetectors with stability over 5000 h

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 484, P. 149653 - 149653

Published: Feb. 17, 2024

Language: Английский

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Quinoidal Semiconductor Nanoparticles for NIR‐II Photoacoustic Imaging and Photoimmunotherapy of Cancer

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

Published: Dec. 18, 2024

Photoagents with ultra-high near-infrared II (NIR-II) light energy conversion efficiency hold great promise in tumor phototherapy due to their ability penetrate deeper tissues and minimize damage surrounding healthy cells. However, the development of NIR-II photoagents remain challenging. In this study, an all-fused-ring quinoidal acceptor-donor-acceptor (A-D-A) molecule, SKCN, a BTP core is synthesized, nanoparticles named FA-SNPs are prepared. The unique structure enhances π-electron delocalization bond length uniformity, significantly reducing bandgap resulting strong absorption, high molar extinction coefficient, photothermal 75.14%. Enhanced molecular rigidity also facilitates efficient transfer oxygen, boosting reactive oxygen species generation. By incorporating immunomodulator R848, FA-SRNPs further developed, effectively modulating immune microenvironment by Tregs M-MDSCs infiltration, promoting dendritic cell maturation, M1 macrophage polarization, activating CD8+ T cells NK Comprehensive studies using orthotopic ovarian cancer models demonstrated targeting, photoacoustic imaging capabilities, significant suppression metastasis inhibition, showing excellent therapeutic efficacy breast model. This study provides evidence for potential application A-D-A molecules photoimmunotherapy.

Language: Английский

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