21 Result(s)
within
Gerasimos Konstantatos
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Silver telluride colloidal quantum dot infrared photodetectors and image sensors
Photodetectors that are sensitive in the shortwave-infrared (SWIR) range (1–2 µm) are of great interest for applications such as machine vision, autonomous driving and three-dimensional, night and adverse weat...
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Author Correction: Cation disorder engineering yields AgBiS2 nanocrystals with enhanced optical absorption for efficient ultrathin solar cells
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Cation disorder engineering yields AgBiS2 nanocrystals with enhanced optical absorption for efficient ultrathin solar cells
Strong optical absorption by a semiconductor is a highly desirable property for many optoelectronic and photovoltaic applications. The optimal thickness of a semiconductor absorber is primarily determined by i...
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Open AccessRoom-temperature direct synthesis of semi-conductive PbS nanocrystal inks for optoelectronic applications
Lead sulphide (PbS) nanocrystals (NCs) are promising materials for low-cost, high-performance optoelectronic devices. So far, PbS NCs have to be first synthesized with long-alkyl chain organic surface ligands ...
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High-efficiency colloidal quantum dot infrared light-emitting diodes via engineering at the supra-nanocrystalline level
Colloidal quantum dot (CQD) light-emitting diodes (LEDs) deliver a compelling performance in the visible, yet infrared CQD LEDs underperform their visible-emitting counterparts, largely due to their low photol...
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Open AccessCurrent status and technological prospect of photodetectors based on two-dimensional materials
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Open AccessUltrasensitive all-2D MoS2 phototransistors enabled by an out-of-plane MoS2 PN homojunction
Two-dimensional transition metal dichalcogenide-based photodetectors have demonstrated potential for the next generation of 2-dimensional optoelectronics. However, to date, their sensitivity has not been super...
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Broadband image sensor array based on graphene–CMOS integration
Integrated circuits based on complementary metal-oxide–semiconductors (CMOS) are at the heart of the technological revolution of the past 40 years, enabling compact and low-cost microelectronic circuits and im...
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Solution-processed solar cells based on environmentally friendly AgBiS2 nanocrystals
AgBiS2 nanocrystals offer a route to solution-processed environmentally friendly solar cells.
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Open AccessIntegrating an electrically active colloidal quantum dot photodiode with a graphene phototransistor
The realization of low-cost photodetectors with high sensitivity, high quantum efficiency, high gain and fast photoresponse in the visible and short-wave infrared remains one of the challenges in optoelectroni...
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The role of surface passivation for efficient and photostable PbS quantum dot solar cells
For any emerging photovoltaic technology to become commercially relevant, both its power conversion efficiency and photostability are key parameters to be fulfilled. Colloidal quantum dot solar cells are a sol...
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Open AccessIntegrated colloidal quantum dot photodetectors with color-tunable plasmonic nanofocusing lenses
High-sensitivity photodetection is at the heart of many optoelectronic applications, including spectroscopy, imaging, surveillance, remote sensing and medical diagnostics. Achieving the highest possible sensit...
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Open AccessHeterovalent cation substitutional do** for quantum dot homojunction solar cells
Colloidal quantum dots have emerged as a material platform for low-cost high-performance optoelectronics. At the heart of optoelectronic devices lies the formation of a junction, which requires the intimate co...
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Solution-processed inorganic bulk nano-heterojunctions and their application to solar cells
In the last decade, solution-processed quantum dot/nanocrystal solar cells have emerged as a very promising technology for third-generation thin-film photovoltaics because of their low cost and high energy-har...
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Hybrid graphene–quantum dot phototransistors with ultrahigh gain
Graphene is an attractive material for optoelectronics1 and photodetection applications2,3,4,5,6 because it offers a broad spectral bandwidth and fast response times. However, weak light absorption and the absenc...
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Erratum: Nanostructured materials for photon detection
Nature Nanotechnology 5, 391–400 (2010); published online: 16 May 2010; corrected after print: 6 December 2010. In the version of this Review originally published, part of a sentence in Table 1 was missing. Th...
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Nanostructured materials for photon detection
The detection of photons underpins imaging, spectroscopy, fibre-optic communications and time-gated distance measurements. Nanostructured materials are attractive for detection applications because they can be...
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Fast, sensitive and spectrally tuneable colloidal-quantum-dot photodetectors
Solution-processed semiconductors are compatible with a range of substrates, which enables their direct integration with organic circuits1,2, microfluidics3,4, optical circuitry1,5 and commercial microelectronics...
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Sensitive solution-processed visible-wavelength photodetectors
One billion image sensors worldwide render optical images as digital photographs in video cameras, still cameras and camera phones. These silicon-based sensors monolithically integrate photodetection with elec...
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Ultrasensitive solution-cast quantum dot photodetectors
The best electronic and optoelectronic devices are built via semiconductor crystal growth on a single-crystal substrate. Over 100 papers have been published in recent years in Nature on alternative devices, produ...
