Browsing by Author "Konstantatos, Gerasimos"

Now showing items 1-20 of 26

  • Ag2ZnSnS4 Nanocrystals Expand the Availability of RoHS Compliant Colloidal Quantum Dots 

    Saha, Avijit; Figueroba, Alberto; Konstantatos, Gerasimos (ACS, 2020)
    Article
    Open Access
    The demonstration of the quantum confinement effect in colloidal quantum dots (QDs) has been extensively studied and exploited mainly in Pb and Cd chalcogenide systems. There has been an urgent need recently for the ...

  • Breaking the Open-Circuit Voltage Deficit Floor in PbS Quantum Dot Solar Cells through Synergistic Ligand and Architecture Engineering 

    Pradhan, Santanu; Stavrinadis, Alexandros; Gupta, Shuchi; Christodoulou, Sotirios; Konstantatos, Gerasimos (ACS, 2017-05-24)
    Article
    Open Access
    To realize the full potential of colloidal quantum dot (CQD) based solar cells, it is important to address the issue of large open-circuit voltage (VOC) deficit which is a major roadblock in reaching higher efficiencies. ...

  • Colloidal Quantum Dot Tandem Solar Cells Using CVD Graphene as An Atomically Thin Intermediate Recombination Layer 

    Bi, Yu; Pradhan, Santanu; Akgul, Mehmet Zafer; Gupta, Shuchi; Stavrinadis, Alexandros; Wang, Jianjun; Konstantatos, Gerasimos (ACS, 2018-06-28)
    Article
    Open Access
    Two-terminal tandem cell architectures are believed to be an effective way to further improve the power conversion efficiency in solution processed photovoltaics. To design an efficient tandem solar cell, two key issues ...

  • High Efficiency Colloidal Quantum Dot Infrared Light Emitting Diodes via Engineering at the Supra-Nanocrystalline Level 

    Pradhan, Santanu; DiStasio, Francesco; Bi, Yu; Gupta, Shuchi; Christodoulou, Sotirios; Stavrinadis, Alexandros; Konstantatos, Gerasimos (Nature, 2018-12-03)
    Article
    Open Access
    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 photoluminescence ...

  • High-Efficiency Light-Emitting Diodes Based on Formamidinium Lead Bromide Nanocrystals and solution processed transport layers 

    Stasio, Francesco Di; Ramiro, Íñigo; Bi, Yu; Christodoulou, Sotirios; Stavrinadis, Alexandros; Konstantatos, Gerasimos (ACS, 2018-09-11)
    Article
    Open Access
    Perovskite nanocrystal light-emitting diodes (LEDs) employing architecture comprising a ZnO nanoparticles electron-transport layer and a conjugated polymer hole-transport layer have been fabricated. The obtained LEDs ...

  • Highly Sensitive, Encapsulated MoS2 Photodetector with Gate Controllable Gain and Speed 

    Kufer, Dominik; Konstantatos, Gerasimos (ACS, 2015-10-26)
    Article
    Restricted access - publisher's policy
    Semiconducting, two-dimensional molybdenum disulfide (MoS2) is considered a promising new material for highly sensitive photodetection, because of its atomically thin profile and favorable bandgap. However, reported ...

  • High Open Circuit Voltage Solar Cells based on bright mixed-halide CsPbBrI2 Perovskite Nanocrystals Synthesized in Ambient Air Conditions 

    Christodoulou, Sotirios; Stasio, Francesco Di; Pradhan, Santanu; Stavrinadis, Alexandros; Konstantatos, Gerasimos (ACS, 2018-03-19)
    Article
    Open Access
    Lead halide perovskite nanocrystals (NCs) are currently emerging as one of the most interesting solution processed semiconductors since they possess high photoluminescence quantum yield (PLQY), and colour tunability through ...

  • Improved electronic coupling in hybrid organic–inorganic nanocomposites employing thiol-functionalized P3HT and bismuth sulfide nanocrystals 

    Martínez, Luis; Higuchi, S.; MacLachlan, A. J.; Stavrinadis, A.; Miller, N. C.; Diedenhofen, Silke L.; Bernechea, María; Sweetnam, S.; Nelson, J.; Haque, S. A.; Tajima, K.; Konstantatos, Gerasimos (Royal Society of Chemistry, 2014-06-19)
    Article
    Open Access
    In this study, we employ a thiol-functionalized polymer (P3HT-SH) as a leverage to tailor the nanomorphology and electronic coupling in polymer–nanocrystal composites for hybrid solar cells. The presence of the thiol ...

  • 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
    Open Access
    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
    Open Access
    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, F. Pelayo; Mihi, Agustín; Konstantatos, Gerasimos (ACS, 2015-06-11)
    Article
    Open Access
    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-temperature colloidal synthesis of CuBiS2 nanocrystals for optoelectronic devices 

    Wang, Jian-Jun; Akgul, Zafer; Bi, Yu; Christodouloua, Sotirios; Konstantatos, Gerasimos (Royal Society of Chemistry, 2017-11-11)
    Article
    Open Access
    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)
    Article
    Open Access
    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 ...

  • Molecular interfaces for plasmonic hot electron photovoltaics 

    García de Arquer, Francisco Pelayo; Mihi, Agustín; Konstantatos, Gerasimos (Royal Society of Chemistry, 2015-01-02)
    Article
    Open Access
    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
    Open Access
    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
    Open Access
    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, Sotiros; Huo, Nengjie; Konstantatos, Gerasimos (ACS, 2017-09-12)
    Article
    Open Access
    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
    Open Access
    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
    Open Access
    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)
    Article
    Open Access
    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 ...