Now showing items 1-16 of 16

    • Beyond Quantum Confinement: Excitonic Nonlocality in Halide Perovskite Nanoparticles with Mie Resonances 

      Berestennikov, A. S.; Li, Y.; Iorsh, I. V.; Zakhidov, Anvar A.; Rogach, A. L.; Makarov, S. V.
      Halide perovskite nanoparticles have demonstrated pronounced quantum confinement properties for nanometer-scale sizes and strong Mie resonances for 10 2 nm sizes. Here we studied the intermediate sizes where the nonlocal ...
    • Effects of Nanostructure Geometry on Nanoimprinted Polymer Photovoltaics 

      Yang, Yi; Mielczarek, Kamil; Aryal, Mukti; Zakhidov, Anvar A.; Hu, Wenchuang (Walter) (RSC Pub, 2014-04-23)
      We demonstrate the effects of nanostructure geometry on the nanoimprint induced poly(3-hexylthiophene-2,5-diyl) (P3HT) chain alignment and the performance of nanoimprinted photovoltaic devices. Out-of-plane and in-plane ...
    • Electrochemically Gated Organic Photovoltaic with Tunable Carbon Nanotube Cathodes 

      Cook, Alexander B.; Yuen, Jonathan D.; Zakhidov, Anvar A. (2013-10-18)
      We demonstrate an organic photovoltaic (OPV) device with an electrochemically gated carbon nanotube (CNT) charge collector. Bias voltages applied to the gate electrode reconfigure the common CNT electrode from an anode ...
    • Halide-Perovskite Resonant Nanophotonics 

      Makarov, S.; Furasova, A.; Tiguntseva, E.; Hemmetter, A.; Berestennikov, A.; Pushkarev, A.; Zakhidov, Anvar A.; Kivshar, Y.
      Halide perovskites have emerged recently as promising materials for many applications in photovoltaics and optoelectronics. Recent studies of optical properties of halide perovskites suggest many novel opportunities for a ...
    • Lambertian White Top-Emitting Organic Light Emitting Device with Carbon Nanotube Cathode 

      Freitag, P.; Zakhidov, Al A.; Luessem, B.; Zakhidov, Anvar A.; Leo, K. (2012-12-04)
      We demonstrate that white organic light emitting devices (OLEDs) with top carbon nanotube (CNT) electrodes show almost no microcavity effect and exhibit essentially Lambertian emission. CNT top electrodes were applied by ...
    • Microwave Conductance of Aligned Multiwall Carbon Nanotube Textile Sheets 

      Brown, Brian L.; Bykova, Julia S.; Howard, Austin R.; Zakhidov, Anvar A.; Shaner, Eric A.; Lee, Mark (2014-12-30)
      Multiwall carbon nanotube (MWNT) sheets are a class of nanomaterial-based multifunctional textile with potentially useful microwave properties. To understand better the microwave electrodynamics, complex AC conductance ...
    • Nanoimprinted Perovskite Metasurface for Enhanced Photoluminescence 

      Wang, Honglei; Liu, Shih-Chia; Balachandran, Balasubramaniam; Moon, Jiyoung; Haroldson, Ross; Li, Zhitong; Ishteev, Artur; Gu, Qing; Zhou, Weidong; Zakhidov, Anvar A.; Hu, Wenchuang (Walter) (Optical Soc Amer, 2018-11-05)
      Recently, solution-processed hybrid halide perovskite has emerged as promising materials for advanced optoelectronic devices such as photovoltaics, photodetectors, light emitting diodes and lasers. In the mean time, ...
    • Photoinduced Migration of Ions in Optically Resonant Perovskite Nanoparticles 

      Gets, D. S.; Tiguntseva, E. Y.; Berestennikov, A. S.; Lyashenko, T. G.; Pushkarev, A. P.; Makarov, S. V.; Zakhidov, Anvar A.
      Organic–inorganic perovskites with a mixed anion composition are widely used in solar cells, light-emitting diodes, and nanophotonic structures. Light nanosources based on resonant perovskite nanoparticles are of particular ...
    • Resonant Silicon Nanoparticles for Enhanced Light Harvesting in Halide Perovskite Solar Cells 

      Furasova, A.; Calabró, E.; Lamanna, E.; Tiguntseva, E.; Ushakova, E.; Ubyivovk, E.; Mikhailovskii, V.; Zakhidov, Anvar A.; Makarov, S.; Di Carlo, A.
      Implementation of resonant nanoparticles (NPs) for improving performance of organometal halide perovskites solar cells is highly prospective approach, because it is compatible with the solution processing techniques used ...
    • Room Temperature Operation of Directly Patterned Perovskite Distributed Feedback Light Source under Continuous-Wave Optical Pumping 

      Gharajeh, Abouzar; Haroldson, Ross; Li, Zhitong; Moon, Jiyoung; Balachandran, Balasubramaniam; Hu, Wenchuang (Walter); Zakhidov, Anvar A.; Gu, Qing
      We report the first directly patterned perovskite distributed feedback (DFB) resonator with a narrow amplified spontaneous emission (ASE) at pump powers as low as 0.1W/cm², under continuous-wave (CW) optical pumping condition ...
    • Stable Doping of Carbon Nanotubes via Molecular Self Assembly 

      Lee, B.; Chen, Y.; Cook, Alex; Zakhidov, Anvar A.; Podzorov, V. (2014-10-13)
      We report a novel method for stable doping of carbon nanotubes (CNT) based on methods of molecular self assembly. A conformal growth of a self-assembled monolayer of fluoroalkyl tri-chloro-silane (FTS) at CNT surfaces ...
    • Superconductivity in an inhomogeneous bundle of metallic and semiconducting nanotubes 

      Grigorenko, I.; Zakhidov, Anvar A. (2013-09-06)
      Using Bogoliubov-de Gennes formalism for inhomogeneous systems, we have studied superconducting properties of a bundle of packed carbon nanotubes, making a triangular lattice in the bundle's transverse cross-section. The ...
    • Tunable Color Parallel Tandem Organic Light Emitting Devices with Carbon Nanotube and Metallic Sheet Interlayers 

      Oliva, Jorge; Papadimitratos, Alexios; Desirena, Haggeo; De la Rosa, Elder; Zakhidov, Anvar A. (American Institute of Physics, 2015-11-19)
      Parallel tandem organic light emitting devices (OLEDs) were fabricated with transparent multiwall carbon nanotube sheets (MWCNT) and thin metal films (Al, Ag) as interlayers. In parallel monolithic tandem architecture, the ...
    • Tunable Hybrid Fano Resonances in Halide Perovskite Nanoparticles 

      Tiguntseva, E. Y.; Baranov, D. G.; Pushkarev, A. P.; Munkhbat, B.; Komissarenko, F.; Franckevičius, M.; Zakhidov, Anvar A.; Shegai, T.; Kivshar, Y. S.; Makarov, S. V.
      Halide perovskites are known to support excitons at room temperatures with high quantum yield of luminescence that make them attractive for all-dielectric resonant nanophotonics and meta-optics. Here we report the observation ...
    • Tunable Organic PV Parallel Tandem with Ionic Gating 

      Saranin, Danila; Ishteev, Artur; Cook, Alexander B.; Yuen, Jonathan D.; Kuznetsov, Denis; Orlova, Marina; Didenko, Sergey; Zakhidov, Anvar (Amer Inst Physics, 2018-10-22)
      A novel type of tunable organic photovoltaic (OPV) tandem device with ionic gating by in-situ ionic liquid is presented. This device is comprised of two solution-processed polymeric OPV cells connected in parallel by a ...
    • Upper Critical Field and Kondo Effects in Fe(Te{0.9} Se{0.1}) Thin Films by Pulsed Field Measurements 

      Salamon, Myron B.; Cornell, N.; Jaime, M.; Balakirev, F. F.; Zakhidov, Anvar A.; Huang, J.; Wang, H. (Nature Publishing Group, 2016-02-10)
      The transition temperatures of epitaxial films of Fe(Te{0.9} Se {0.1}) are remarkably insensitive to applied magnetic field, leading to predictions of upper critical fields B{c2}(T = 0) in excess of 100 T. Using pulsed ...