PbS quantum dot based hybrid-organic photodetectors for X-ray sensing

Ankah, Genesis Ngwa; Büchele, Patric; Poulsen, Katharina; Rauch, Tobias; Tedde, Sandro F.; Gimmler, Christoph; Schmidt, O.; Kraus, Tobias

doi:10.1016/j.orgel.2016.03.023

Cited by 48 publications

(36 citation statements)

References 31 publications

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“…The photodetector is an electronic device that can convert an optical signal into an electrical signal . Photodetectors are widely used in many fields, such as ray measurement and detection, infrared thermal imaging, infrared remote sensing, and so on. The working mechanism of traditional photodetectors is based on the photoconductivity effect.…”

Section: Introductionmentioning

confidence: 99%

Self‐Powered Photodetectors Based on 2D Materials

Qiao

Huang

Ren

et al. 2019

Advanced Optical Materials

306

225

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Self‐powered photodetectors are considered as a new type of photodetectors enabling self‐powered photodetection without external power. The excellent photoresponsivity, fast photoresponse rate, low dark current, and large light on/off ratio of these photodetectors have attracted wide interest among scholars. 2D materials are widely used in self‐powered photodetectors due to their excellent optical and electrical properties, unique 2D structures, and their capabilities to exhibit excellent photodetection performance. According to the self‐driving mechanism of 2D material‐based self‐powered photodetectors, they are divided into three categories: p–n junction photodetectors, Schottky junction photodetectors, and photoelectrochemical photodetectors. From these three perspectives, the research progress of 2D material‐based self‐powered photodetectors is summarized in detail here. Research reports indicate that 2D material‐based self‐powered photodetectors have excellent self‐powered photoresponse behavior, good light on/off characteristics, and wideband spectral response ranges. The excellent photoresponse performance of 2D material‐based self‐powered photodetectors facilitates their potential applications in the field of optoelectronic devices. In particular, self‐powered photodetectors have great potential as novel emerging self‐driven optoelectronic devices. Finally, directions for the further development of 2D material‐based self‐powered photodetectors are anticipated.

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Section: Introductionmentioning

confidence: 99%

Self‐Powered Photodetectors Based on 2D Materials

Qiao

Huang

Ren

et al. 2019

Advanced Optical Materials

306

225

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“…There is increasing attention given to organic photodetectors for X-ray detection 7 , 8 . This often involves the coupling of scintillator screens with organic photodiodes 9 , insertion of high-atomic number ( Z ) nanoparticles (NPs) 10 , quantum dots 11 or scintillator particles into organic diodes 12 , or the use of thin film organic semiconductors 8 or crystals 13 . Of these, the use of X-ray scintillators is often preferred as this enables the already mature organic photodetector technologies to be adapted for X-ray detection.…”

Section: Introductionmentioning

confidence: 99%

High sensitivity organic inorganic hybrid X-ray detectors with direct transduction and broadband response

et al. 2018

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X-ray detectors are critical to healthcare diagnostics, cancer therapy and homeland security, with many potential uses limited by system cost and/or detector dimensions. Current X-ray detector sensitivities are limited by the bulk X-ray attenuation of the materials and consequently necessitate thick crystals (~1 mm–1 cm), resulting in rigid structures, high operational voltages and high cost. Here we present a disruptive, flexible, low cost, broadband, and high sensitivity direct X-ray transduction technology produced by embedding high atomic number bismuth oxide nanoparticles in an organic bulk heterojunction. These hybrid detectors demonstrate sensitivities of 1712 µC mGy−1 cm−3 for “soft” X-rays and ~30 and 58 µC mGy−1 cm−3 under 6 and 15 MV “hard” X-rays generated from a medical linear accelerator; strongly competing with the current solid state detectors, all achieved at low bias voltages (−10 V) and low power, enabling detector operation powered by coin cell batteries.

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“…Lead chalcogenide (PbE, E = S, Se) quantum dots (QDs) are desirable materials for implementation in photodetectors because of their potential for improving upon current technologies in the near-infrared (near-IR) and mid-IR spectral regions [1][2][3][4]. Improving capabilities in this region is of great consequence for applications in environmental monitoring [5][6][7], motion sensing [8], fiber-optic communications [9,10], X-ray detection [11], and biological imaging [12], where Pb-based QDs have been shown to be less destructive to cells than there Cd-based counterparts when coated with silica. PbE QDs have size-tunable bandgaps from 800 to 4000 nm (1.55-0.31 eV) [13,14], as shown in Figure 1A, and their solution processability allows for facile integration onto both rigid and flexible substrates through spin-coating, dip-coating, and ink-jet printing [4,15].…”

Section: Introductionmentioning

confidence: 99%

PbE (E = S, Se) Colloidal Quantum Dot-Layered 2D Material Hybrid Photodetectors

2020

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Hybrid lead chalcogenide (PbE) (E = S, Se) quantum dot (QD)-layered 2D systems are an emerging class of photodetectors with unique potential to expand the range of current technologies and easily integrate into current complementary metal-oxide-semiconductor (CMOS)-compatible architectures. Herein, we review recent advancements in hybrid PbE QD-layered 2D photodetectors and place them in the context of key findings from studies of charge transport in layered 2D materials and QD films that provide lessons to be applied to the hybrid system. Photodetectors utilizing a range of layered 2D materials including graphene and transition metal dichalcogenides sensitized with PbE QDs in various device architectures are presented. Figures of merit such as responsivity (R) and detectivity (D*) are reviewed for a multitude of devices in order to compare detector performance. Finally, a look to the future considers possible avenues for future device development, including potential new materials and device treatment/fabrication options.

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PbS quantum dot based hybrid-organic photodetectors for X-ray sensing

Cited by 48 publications

References 31 publications

Self‐Powered Photodetectors Based on 2D Materials

Self‐Powered Photodetectors Based on 2D Materials

High sensitivity organic inorganic hybrid X-ray detectors with direct transduction and broadband response

PbE (E = S, Se) Colloidal Quantum Dot-Layered 2D Material Hybrid Photodetectors

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