Halide-exchanged perovskite photodetectors for wearable visible-blind ultraviolet monitoring

Zhou, Yu; Qiu, Xiao; Wan, Zhu’an; Long, Zhenghao; Poddar, Swapnadeep; Zhang, Qianpeng; Ding, Yongcheng; Chan, Chak Lam Jonathan; Zhang, Daquan; Zhou, Kemeng; Lin, Yuanjing; Fan, Zhiyong

doi:10.1016/j.nanoen.2022.107516

Cited by 59 publications

(31 citation statements)

References 39 publications

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“…11−13 For example, Zhou et al prepared a flexible photodetector based on a halide-exchanged perovskite film, which could be used as a wearable wristband for real-time UV monitoring. 14 Li and co-workers demonstrated a fully flexible Ta-doped β-Ga 2 O 3 phototransistor array, which could perform image recognition combined with an artificial neural network. 15 The crucial problem of flexible UV photodetectors lies in the preparation of photosensitive semiconductor materials on flexible substrates.…”

Section: ■ Introductionmentioning

confidence: 99%

Sunscreen-Inspired ZnO/PEG Composites for Flexible Ultraviolet Photodetectors with a Giant On–Off Ratio

Yang

et al. 2023

ACS Photonics

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Zinc oxide (ZnO) nanomaterials have attracted much attention in UV photodetectors owing to the suitable band gap and high photoelectric conversion efficiency. However, the loose structure of nanomaterials assembled by a low-temperature process cannot meet the mechanical requirements of flexible photodetectors. The high dark current caused by defects in ZnO severely drags down the response performance of photodetectors. To address these issues, we have proposed a novel strategy for constructing flexible photodetectors based on ZnO and poly(ethylene glycol) (PEG) composites. Inspired by the sunscreen, the addition of PEG can enhance the interaction of ZnO nanoparticles, thus improving the film-forming ability and the mechanical endurance of the composites. By coating the ZnO/PEG composite on a common printing paper, the flexible photodetector shows unexpected good performance, such as a high responsivity of 1.77 A·W–1 and a large specific detectivity of 3.89 × 1013 Jones. Notably, a giant on–off ratio of up to 1.99 × 105 has been achieved by suppression of dark current. The device also exhibits satisfactory mechanical flexibility after long-term bending tests. In addition, the low-cost raw materials and scalable manufacturing processes further expand its application prospects in flexible optoelectronic technologies.

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Section: ■ Introductionmentioning

confidence: 99%

Sunscreen-Inspired ZnO/PEG Composites for Flexible Ultraviolet Photodetectors with a Giant On–Off Ratio

Yang

et al. 2023

ACS Photonics

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“…Perovskites, especially metal halide perovskites are enthusiastically employed in numerous fields such as Flexible-electronics, photodetectors, , solar cells, lasers, LEDs, and photo catalysis due to their remarkable optoelectronic properties such as high charge carrier mobility, diffusion length, tunable band gap, and ease of synthesis via low temperature solution processing methods. , Among them, perovskite based light emitting diodes (p-LEDs) have gained much attention as powerful display devices due to their enhanced external quantum efficiency (EQE) from 1% to more than 23% as reported by recent literature . One of the major drawbacks that hinder the upliftment of EQE in perovskites is the non-radiative recombination rates arising from crystal defects .…”

Section: Introductionmentioning

confidence: 99%

Solvent Evaporation Induced Large-Scale Synthesis of Cs₄PbBr₆ and CsPbBr₃ Microcrystals: Optical Properties and Backlight Application for LEDs

et al. 2023

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The contemporary work focuses on embossing the emissive nature of lead halide perovskite materials, specifically Cs 4 PbBr 6 microcrystal powder prepared via single step bulk recrystallization method followed by the solvent evaporation route from gram to kilogram scale. The X-ray diffraction pattern confirms the formation of phase pure Cs 4 PbBr 6 with a goodness of fit value of 1.51 calculated from Rietveld refinement and the fluorophore powder manifesting an intrinsic band gap of 3.76 eV. The experimental yield of 99.4% indicates the absence of any unreacted precursors. The fabricated flexible, free-standing Cs 4 PbBr 6 @PMMA film encompassed better moisture stability without undergoing phase transitions for 400 days. The temperature-dependent photoluminescence spectra denote that 51% of the intensity was retained when cooled back to room temperature after heating it till 180 °C. Moisture studies at two extreme humidity conditions also reveal the appreciable stability of the fluorophore film against moisture. The stability studies with respect to UV irradiation substantiate that the film retained its stability even after exposing it continuously to UV radiation for seven days. The outstanding optical properties of these microcrystals, owing to the higher exciton binding energy, make them a promising candidate as excellent fluorophores for color conversion, backlight, and light-emitting applications. The Cs 4 PbBr 6 @PMMA film was employed as the top cover of a commercial blue LED, producing a robust green emission which revealed its possible application as a phosphor material.

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“…The photodetector, with the ability to convert optical signals into electrical signals, has been widely applied in various fields ranging from image sensing and biochemical detection to optical communication. − The ever-increasing advancements in portable and flexible technology call for photodetectors with excellent omnidirectional photosensitivity because the ability to detect light from omnidirectional angles is urgent in omnidirectional cameras, optical tracing systems, and wearable fashionable optoelectronic devices. ,− However, because of the limit of weak absorption, the ability of the majority of reported photodetectors to absorb incident light efficiently in multiple directions remains a challenge. , Therefore, improving the absorption is one of the indispensable ingredients for next-generation 360° omnidirectional photodetectors. For improving the light absorption, assembling bulky lenses, optimizing the structure of photodetector, and using materials with strong absorption are the main means to supplement the 360° photodetection.…”

Section: Introductionmentioning

confidence: 99%

Flexible Omnidirectional Self-Powered Photodetectors Enabled by Solution-Processed Two-Dimensional Layered PbI₂ Nanoplates

Liu

Chen

Liu

et al. 2022

ACS Appl. Mater. Interfaces

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Realizing omnidirectional self-powered photodetectors is central to advancing next-generation portable and smart photodetector systems. However, the traditional omnidirectional photodetector is typically achieved by integrating complex hemispherical microlens on multiple photodetectors, which makes the detection system cumbersome and restricts its application in the portable field. Here, facile and high-performance flexible omnidirectional self-powered photodetectors are achieved by solution-processed two-dimensional (2D) layered PbI2 nanoplates on transparent conducting substrates. Characterization of PbI2 nanoplates microstructural/compositional and their photodetection properties have been systematically characterized. Under the irradiation of a 405 nm laser, the photodetectors exhibit an impressively low dark current of 10–13 A, a high light on/off ratio up to 106, and a fast rise/decay response time of 2/3 ms. Importantly, when light irradiates the photodetector at 5°, it can still maintain high photodetection properties, realizing almost 360° omnidirectional self-powered photodetection. What is more, these self-powered photodetectors exhibit robust omnidirectional photoresponse stability of flexibility even after bending for 1200 cycles. Thus, this work broadens the applicability of 2D layered nanoplates for further extending its applications in advanced optoelectronic devices.

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Halide-exchanged perovskite photodetectors for wearable visible-blind ultraviolet monitoring

Cited by 59 publications

References 39 publications

Sunscreen-Inspired ZnO/PEG Composites for Flexible Ultraviolet Photodetectors with a Giant On–Off Ratio

Sunscreen-Inspired ZnO/PEG Composites for Flexible Ultraviolet Photodetectors with a Giant On–Off Ratio

Solvent Evaporation Induced Large-Scale Synthesis of Cs₄PbBr₆ and CsPbBr₃ Microcrystals: Optical Properties and Backlight Application for LEDs

Flexible Omnidirectional Self-Powered Photodetectors Enabled by Solution-Processed Two-Dimensional Layered PbI₂ Nanoplates

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Halide-exchanged perovskite photodetectors for wearable visible-blind ultraviolet monitoring

Cited by 59 publications

References 39 publications

Sunscreen-Inspired ZnO/PEG Composites for Flexible Ultraviolet Photodetectors with a Giant On–Off Ratio

Sunscreen-Inspired ZnO/PEG Composites for Flexible Ultraviolet Photodetectors with a Giant On–Off Ratio

Solvent Evaporation Induced Large-Scale Synthesis of Cs4PbBr6 and CsPbBr3 Microcrystals: Optical Properties and Backlight Application for LEDs

Flexible Omnidirectional Self-Powered Photodetectors Enabled by Solution-Processed Two-Dimensional Layered PbI2 Nanoplates

Contact Info

Product

Resources

About

Solvent Evaporation Induced Large-Scale Synthesis of Cs₄PbBr₆ and CsPbBr₃ Microcrystals: Optical Properties and Backlight Application for LEDs

Flexible Omnidirectional Self-Powered Photodetectors Enabled by Solution-Processed Two-Dimensional Layered PbI₂ Nanoplates