Exploració per autor "Konstantatos, Gerasimos"

Ara es mostren els items 21-40 de 45

    • Integrated colloidal quantum dot photodetectors with color-tunable plasmonic nanofocusing lenses 

      Diedenhofen, Silke L.; Kufer, Dominik; Lasanta, Tania; Konstantatos, Gerasimos (Nature Publishin group, 2015-01-16)
      Article
      Accés obert
      High-sensitivity photodetection is at the heart of many optoelectronic applications, including spectroscopy, imaging, surveillance, remote sensing and medical diagnostics. Achieving the highest possible sensitivity for a ...

    • Interface Engineering in Hybrid Quantum Dot–2D Phototransistors 

      Kufer, Dominik; Lasanta, Tania; Bernechea, Maria; Koppens, Frank H. L.; Konstantatos, Gerasimos (ACS, 2016-05-31)
      Article
      Accés obert
      The hybridization of two-dimensional transition metal dichalcogenides (TMDCs) with colloidal quantum dots (QDs) has been demonstrated to be an ideal platform for low dark-current and highly sensitive photodetection due to ...

    • Large-Area Plasmonic-Crystal−Hot-Electron-Based Photodetectors 

      García de Arquer, Francisco Pelayo; Mihi, Agustín; Konstantatos, Gerasimos (ACS, 2015-06-11)
      Article
      Accés obert
      In view of their exciting optoelectronic light− matter interaction properties, plasmonic−hot-electron devices have attracted significant attention during the last few years as a novel route for photodetection and ...

    • Low-Cost RoHS Compliant Solution Processed Photovoltaics Enabled by Ambient Condition Synthesis of AgBiS2 Nanocrystals 

      Akgul, M. Zafer; Figueroba, Alberto; Pradhan, Santanu; Bi, Yu; Konstantatos, Gerasimos (ACS, 2020-03-04)
      Article
      Accés obert
      Two major challenges exist before colloidal nanocrystal solar cells can take their place in the market: So far, these devices are based on Pb/Cd-containing nanocrystals, and second, the synthesis of these nanocrystals takes ...

    • Low-temperature colloidal synthesis of CuBiS2 nanocrystals for optoelectronic devices 

      Wang, Jian-Jun; Akgul, Zafer; Bi, Yu; Christodoulou, Sotirios; Konstantatos, Gerasimos (Royal Society of Chemistry, 2017-11-11)
      Article
      Accés obert
      A new facile colloidal synthesis of CuBiS2 (CBS) nanocrystals with monodispersed size and good quality has been developed. The CBS nanocrystal films was deposited by solid-state ligand exchange and their field effect ...

    • Matildite Contact with Media: First-Principles Study of AgBiS2 Surfaces and Nanoparticle Morphology 

      Viñes, Francesc; Konstantatos, Gerasimos; Illas, Francesc (ACS, 2017-07-27)
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      Accés obert
      Motivated by the interest in AgBiS2 material for solar light harvesting applications, a detailed bulk first-principles quantum mechanical study of its surface properties is presented. Density functional theory based ...

    • Metal-insulator-semiconductor heterostructures for plasmonic hot-carrier optoelectronics 

      García de Arquer, Francisco Pelayo; Konstantatos, Gerasimos (OSA, 2015-06-01)
      Article
      Accés obert
      Plasmonic hot-electron devices are attractive candidates for light-energy harvesting and photodetection applications. For solid state devices, the most compact and straightforward architecture is the metalsemiconductor Schottky ...

    • Mid- and long-wave infrared optoelectronics via intraband transitions in PbS Colloidal Quantum Dots 

      Özdemir, Onur; Konstantatos, Gerasimos; Ramiro, Iñigo; Christodoulou, Sotirios; Gupta, Shuchi; Dalmases, Mariona; Torre, Iacopo (2020-02-12)
      Article
      Accés obert
      Optical sensing in the mid- and long-wave infrared (MWIR, LWIR) is of paramount importance for a large spectrum of applications including environmental monitoring, gas sensing, hazard detection, food and product manufacturing ...

    • Mixed AgBiS2 nanocrystals for photovoltaics and photodetectors 

      Burgués-Ceballos, Ignasi; Wang, Yongjie; Konstantatos, Gerasimos (Royal Society of Chemistry, 2022-03-03)
      Article
      Accés obert
      Heavy-metal-free colloidal nanocrystals are gaining due attention as low-cost, semiconducting materials for solution-processed optoelectronic applications. One common limitation of such materials is their limited carrier ...

    • Molecular interfaces for plasmonic hot electron photovoltaics 

      García de Arquer, Francisco Pelayo; Mihi, Agustín; Konstantatos, Gerasimos (Royal Society of Chemistry, 2015-01-02)
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      Accés obert
      The use of self-assembled monolayers (SAMs) to improve and tailor the photovoltaic performance of plasmonic hot-electron Schottky solar cells is presented. SAMs allow the simultaneous control of open-circuit voltage, ...

    • MoS2-HgTe Quantum Dot Hybrid Photodetectors beyond 2 µm 

      Huo, Nengjie; Gupta, Shuchi; Konstantatos, Gerasimos (Wiley, 2017-05-03)
      Article
      Accés obert
      Mercury telluride (HgTe) colloidal quantum dots (CQDs) have been developed as promising materials for the short and mid‐wave infrared photodetection applications because of their low cost, solution processing, and size ...

    • MoS2-HgTe Quantum Dot Hybrid Photodetectors beyond 2 μm 

      Huo, Nengjie; Gupta, Shuchi; Konstantatos, Gerasimos (Wiley, 2017-02-01)
      Article
      Accés obert
      Mercury telluride (HgTe) colloidal quantum dots (CQDs) have been developed as promising materials for the short and mid-wave infrared photodetection applications because of their low cost, solution processing and size ...

    • Near-Unity Photoluminescence Quantum Yield in CsPbBr3 Nanocrystal Solid-State Films via Postsynthesis Treatment with Lead Bromide 

      Stasio, Francesco Di; Christodoulou, Sotirios; Huo, Nengjie; Konstantatos, Gerasimos (ACS, 2017-09-12)
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      Accés obert
      Metal halide perovskite nanocrystals (NCs) possess high photoluminescence (PL) quantum yield (PL) and color tunability. Yet, until now, it has been difficult to maintain the high PL observed in solution in spin-coated films. ...

    • Photo-FETs: phototransistors enabled by 2D and 0D nanomaterials 

      Kufer, Dominik; Konstantatos, Gerasimos (ACS, 2016-10-27)
      Article
      Accés obert
      The large diversity of applications in our daily lives that rely on photodetection technology requires photodetectors with distinct properties. The choice of an adequate photodetecting system depends on its application, ...

    • Reducing Interface Recombination through Mixed Nanocrystal Interlayers in PbS Quantum Dot Solar Cells 

      Pradhan, Santanu; Stavrinadis, Alexandros; Gupta, Shuchi; Konstantatos, Gerasimos (ACS, 2017-08-08)
      Article
      Accés obert
      The performance of ZnO/PbS colloidal quantum dot (CQD)-based heterojunction solar cells is hindered by charge carrier recombination at the heterojunction interface. Reducing interfacial recombination can improve charge ...

    • Science and technology roadmap for graphene, related two-dimensional crystals, and hybrid systems 

      Ferrari, Andrea C; Bonaccorso, Francesco; Fal'ko, Vladimir; Novoselov, Konstantin S; Roche, Stephan; Boggild, Peter; Borini, Frank H L; Palermo, Vincenzo; Pugno, Nicola; Garrido, Jose A; Sordan, Roman; Bianco, Alberto; Ballerini, Laura; Prato, Maurizio; Lidorikis, Elefterios; Kivioja, Jani; Marinelli, Claudio; Ryhanen, Tapani; Morpurgo, Alberto; Coleman, Jonathan N; Nicolosi, Valeria; Colombo, Luigi; Fert, Albert; Garcia-Hernandez, Mar; Bachtold, Adrian; Schneider, Gregory F; Guinea, Francisco; Dekker, Cees; Barbone, Matteo; Sun, Zhipei; Galiotis, Costas; Grigorenko, Alexander N; Konstantatos, Gerasimos; Kis, Andras; Katsnelson, Mikhail; Vandersypen, Lieven; Loiseau, Annick; Morandi, Vittorio; Neumaier, Daniel; Treossi, Emanuele; Pellegrini, Vittorio; Polini, Marco; Tredicucci, Alessandro; Williams, Gareth M; Hee Hong, Byung; Ahn, Jong-Hyun; Min Kim, Jong; Zirath, Herbert; van Wees, Bart J; van der Zant, Herre; Occhipinti, Luigi; Di Matteo, Andrea; Kinloch, Ian A; Seyller, Thomas; Quesnel, Etienne; Feng, Xinliang; Teo, Ken; Rupesinghe, Nalin; Hakonen, Pertti; Neil, Simon R T; Tannock, Quentin; Lofwander, Tomas; Kinaret, Jari (Royal Society of Chemistry, 2015-09-22)
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      Accés obert
      We present the science and technology roadmap for graphene, related two-dimensional crystals, and hybrid systems, targeting an evolution in technology, that might lead to impacts and benefits reaching into most areas of ...

    • Single-exciton gain and stimulated emission across the infrared telecom band from robust heavily doped PbS colloidal quantum dots 

      Christodoulou, Sotirios; Ramiro, Iñigo; Othonos, Andreas; Özdemir, Onur; Dalmases Solé, Mariona; Özdemir, Onur; Pradhan, Santanu; Itskos, Grigorios; Konstantatos, Gerasimos (2020-08-12)
      Article
      Accés obert
      Materials with optical gain in the infrared are of paramount importance for optical communications, medical diagnostics, and silicon photonics. The current technology is based either on costly III-V semiconductors that are ...

    • Size- and temperature-dependent intraband optical properties of heavily n-doped PbS colloidal quantum dot solid-state films 

      Ramiro, Iñigo; Kundu, Biswajit; Dalmases, Mariona; Özdemir, Onur; Pedrosa, María; Konstantatos, Gerasimos (2020-06-23)
      Article
      Accés obert
      Steady-state access to intraband transitions in colloidal quantum dots (CQDs), via heavy doping, allows exploiting the electromagnetic spectrum at energies below the band gap. CQD intraband optoelectronics opens up a new ...

    • Solid-State Colloidal CuInS2 Quantum Dot Solar Bulk Heterojunctions 

      So, David; Pradhan, Santanu; Konstantatos, Gerasimos (Royal Society of Chemistry, 2016-08-29)
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      Accés obert
      Colloidal copper indium sulfide (CIS) nanocrystals (NCs) are Pb- and Cd-free alternatives for use as absorbers in quantum dot solar cells. In a heterojunction with TiO2, non-annealed ligand-exchanged CIS NCs form solar ...

    • Solid-State Thin-Film Broadband Short-Wave Infrared Light Emitters 

      Pradhan, Santanu; Dalmases, Mariona; Konstantatos, Gerasimos (2020-09-30)
      Article
      Accés obert
      Solid-state broadband light emitters in the visible have revolutionized today's lighting technology achieving compact footprints, flexible form factors, long lifetimes, and high energy saving, although their counterparts ...