Challenges and Opportunities of Upconversion Nanoparticles for Emerging NIR Optoelectronic Devices

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 16, 2025

Abstract Upconversion nanoparticles (UCNPs), incorporating lanthanide (Ln) dopants, can convert low‐energy near‐infrared photons into higher‐energy visible or ultraviolet light through nonlinear energy transfer processes. This distinctive feature has attracted considerable attention in both fundamental research and advanced optoelectronics. Challenges such as low energy‐conversion efficiency nonradiative losses limit the performance of UCNP‐based optoelectronic devices. Recent advancements including optimized core–shell structures, tailed Ln‐doping concentration, surface modifications show significant promise for improving stability. In addition, combining UCNPs with functional materials broaden their applications improve device performance, paving way innovation next‐generation paper first categorizes elaborates on various upconversion mechanisms UCNPs, focusing strategies to boost prolong luminescence. Subsequently, an in‐depth discussion that enhance expand functionality is provided. Furthermore, a wide range devices explored, multiple emerging neuromorphic computing are highlighted. Finally, existing challenges potential solutions involved developing practical considered, well outlook future technologies

Language: Английский

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Broadband Pyro-Phototronic Effect in Lead-Free Double Perovskite Crystal Enables UV-to-NIR and Polarization-Sensitive Detection

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

Published: May 5, 2025

Language: Английский

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High-Performance Broadband Photodetectors Combining Perovskite and Organic Bulk Heterojunction Bifunctional Layers

Crystals, Journal Year: 2024, Volume and Issue: 14(10), P. 868 - 868

Published: Oct. 1, 2024

Perovskite can be used to prepare high-performance photodetectors due its excellent optical properties. However, the detection range of perovskite is mostly limited visible light range, restricting their further development and application. In recent years, combining with organic bulk heterojunctions broadband capability has proven an effective strategy. Through this approach, response spectrum photodetector flexibly regulated, compounds improve film quality by passivating defects inhibit penetration water molecules in air, thereby improving device performance stability. work, we propose demonstrate feasibility MAPbI3 PTB7-Th:COTIC-4F wide spectral characteristics. With assistance heterojunction, crystals are effectively passivated, successfully extended about 1100 nm. As a result, responsivity achieved 0.58 A/W, 1.19 1.41 A/W under laser illumination 532 nm, 808 980 power density 5 μW/cm2 at bias voltage −0.5 V, respectively, which one best performances among vertical structures type. Moreover, stability final hybrid been greatly improved. This work provides new approach preparation photodetectors.

Language: Английский

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Near-Infrared Organic–Inorganic Copper Halide Film with Spectral Response over 1400 nm for Photodetector Application

ACS Applied Electronic Materials, Journal Year: 2024, Volume and Issue: 6(12), P. 9103 - 9112

Published: Dec. 12, 2024

Organic–inorganic metal halides (OIMHs) have emerged as promising light absorbers for photodetector applications, especially Cu-based OIMHs. Herein, a novel OIMH named (BA)4CuII(CuIInIII)0.5Cl8 has been synthesized by an ethanol assisted stirring method powders, and film sample further fabricated one step spin-coating method. exhibits broadband absorption spectrum, peaking at 375, 620, well 875 nm, cutoff wavelength up to 1400 nm. In particular, simple photoconductive based on the absorber is first realized. The responsivity (R) detectivity (D*) are high 2.6 × 10–5 A/W 7 108 Jones 980 respectively. measured linear dynamic range (LDR) calculated be 29 dB. Besides, flexible with polyvinyl chloride (PVC) substrate bending angle exceeding 90°, device can still work stably even after 80 cycles. This provides strategy realize of in NIR region highlights its potential detection imaging applications.

Language: Английский

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High-Efficiency Photocatalyst and High-Response Ultraviolet Photodetector Based on the Ga2sse/Gan Heterojunction

Published: Jan. 1, 2024

Language: Английский

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Iodine management of crown ether in perovskite resistive random access memories for improved switching ratio and long-term stability

Journal of Alloys and Compounds, Journal Year: 2024, Volume and Issue: unknown, P. 178207 - 178207

Published: Dec. 1, 2024

Language: Английский

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