Colloidal and Epitaxial Quantum Dot Infrared Photodetectors: Growth, Performance, and Comparison

Kazemi, Alireza; Zamiri, Marziyeh; Kim, Jun Oh; Schuler-Sandy, Ted; Krishna, Sanjay

doi:10.1002/047134608x.w8225

Cited by 3 publications

(2 citation statements)

References 280 publications

(343 reference statements)

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“…Various upconversion systems in the form of solution-processed nanoparticles (NPs) have been synthesized, − mostly based on the doping of trivalent lanthanide cations in low phonon energy hosts and performing upconversion through a two- or multi-photon mechanism . Since then, they have been applied into many applications including biomedical engineering, − thermal sensing, , solar energy harvesting, − and photodetection. − Indeed, most of these photon upconversion applications are based on Yb 3+ and Er 3+ codoped systems capable to upconvert near-infrared light with a wavelength maximum no larger than 1.0 μm (e.g., upconversion from 808 or 975 nm to visible photons). Material systems able to upconvert SWIR photons remain rare.…”

Section: Introductionmentioning

confidence: 99%

Heavy-Metal-Free Flexible Hybrid Polymer-Nanocrystal Photodetectors Sensitive to 1.5 μm Wavelength

Xiang

Billot

et al. 2019

ACS Appl. Mater. Interfaces

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Photodetection in the short-wave infrared (SWIR) wavelength window represents one of the core technologies allowing for many applications. Most current photodetectors suffer from high cost due to the epitaxial growth requirements and the ecological issue due to the use of highly toxic heavy-metal elements. Toward alternative SWIR photodetection strategies, in this work, high-performance heavy-metal-free flexible photodetectors sensitive to λ = 1.5 μm photons are presented based on the formation of a solution-processed hybrid composed of a conjugated diketopyrrolopyrrole-base polymer/PC70BM bulk heterojunction organic host together with inorganic guest NaYF4:15%Er3+ upconversion nanoparticles (UCNPs). Under the illumination of λ = 1.5 μm SWIR photons, optimized hybrid bulk-heterojunction (BHJ)/UCNP photodetectors exhibit a photoresponsivity of 0.73 and 0.44 mA/W, respectively, for devices built on rigid indium tin oxide (ITO)/glass and flexible ITO/polyethylene terephthalate substrates. These hybrid photodetectors are capable of performing SWIR photodetection with a fast operation speed, characterized by a short photocurrent rise time down to 80 μs, together with an excellent mechanical robustness for flexible applications. Exhibiting simultaneously multiple advantages including solution-processability, flexibility, and the absence of toxic heavy metal elements together with a fast operation speed and good photoresponsivity, these hybrid BHJ(DPPTT-T/PC70BM)/UCNP photodetectors are promising candidates for next-generation low-cost and high-performance SWIR photodetectors.

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Section: Introductionmentioning

confidence: 99%

Heavy-Metal-Free Flexible Hybrid Polymer-Nanocrystal Photodetectors Sensitive to 1.5 μm Wavelength

Xiang

Billot

et al. 2019

ACS Appl. Mater. Interfaces

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“…Furthermore, the optical absorption and emission spectra of the quantum dots can widely be controlled via the quantum size effect 24 to achieve tunable emission and absorption, which made them desirable for next-generation of high-speed infrared photodetectors 25 , 26 . Solution-processed materials such as colloidal quantum dots provide higher absorption, low-cost manufacturing, room-temperature processing, and ease of large-area fabrication on rigid or flexible substrates 27 , 28 , which have obviously proposed as a candidate material for optoelectronic devices like photodetectors 29 , 30 .…”

Section: Introductionmentioning

confidence: 99%

High-speed and high-precision PbSe/PbI2 solution process mid-infrared camera

Dortaj

Dolatyari

Zarghami

et al. 2021

Sci Rep

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Infrared (IR) cameras based on semiconductors grown by epitaxial methods face two main challenges, which are cost and operating at room temperature. The alternative new technologies which can tackle these two difficulties develop new and facile material and methods. Moreover, the implementation of high speed camera, which makes high resolution images with normal methods, is very expensive. In this paper, a new nanostructure based on a cost-effective solution processed technology for the implementation of the high-speed mid-infrared light camera at room temperature is proposed. To this end, the chemically synthesized PbSe–PbI2 core–shell Quantum Dots (QDs) are used. In this work, a camera including 10 × 10 pixels is fabricated and synthesized QDs spin-coated on interdigitated contact (IDC) and then the fabricated system passivated by epoxy resin. Finally, using an electronic reading circuit, all pixels are converted to an image on the monitor. To model the fabricated camera, we solved Schrodinger–Poisson equations self consistently. Then output current from each pixel is modeled based on semiconductor physics and dark and photocurrent, as well as Responsivity and Detectivity, are calculated. Then the fabricated device is examined, and dark and photocurrents are measured and compared to the theoretical results. The obtained results indicate that the obtained theoretical and measured experimental results are in good agreement together. The fabricated detector is high speed with a rise time of 100 ns. With this speed, we can get 10 million frames per second; this means we can get very high-resolution images. The speed of operation is examined experimentally using a chopper that modulates input light with 50, 100, 250, and 500 Hz. It is shown that the fabricated device operates well in these situations, and it is not limited by the speed of detector. Finally, for the demonstration of the proposed device operation, some pictures and movies taken by the camera are attached and inserted in the paper.

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Perovskite Quantum Dot Photodetectors

2020

Perovskite Quantum Dots

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Colloidal and Epitaxial Quantum Dot Infrared Photodetectors: Growth, Performance, and Comparison

Cited by 3 publications

References 280 publications

Heavy-Metal-Free Flexible Hybrid Polymer-Nanocrystal Photodetectors Sensitive to 1.5 μm Wavelength

Heavy-Metal-Free Flexible Hybrid Polymer-Nanocrystal Photodetectors Sensitive to 1.5 μm Wavelength

High-speed and high-precision PbSe/PbI2 solution process mid-infrared camera

Perovskite Quantum Dot Photodetectors

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