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Notices by arXiv Physics (arxivphysics@qoto.org)

  1. arXiv Physics (arxivphysics@qoto.org)'s status on Monday, 11-Nov-2019 03:05:04 UTC arXiv Physics arXiv Physics

    Ionically gated perovskite solar cell with tunable carbon nanotube interface at thick fullerene electron transporting layer: comparison to gated OPV. (arXiv:1911.02619v1 [physics.app-ph]) http://arxiv.org/abs/1911.02619

    In conversation Monday, 11-Nov-2019 03:05:04 UTC from qoto.org permalink

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    1. Ionically gated perovskite solar cell with tunable carbon nanotube interface at thick fullerene electron transporting layer: comparison to gated OPV
      We demonstrate an ionically gated planar PS-PV solar cell with ultra-thick fullerene ETL with a porous CNT electron collector on top of it. Perovskite photovoltaic devices usually have undoped electron transport layers, usually thin like C60 due to its high resistance. Metallic low work function cathodes are extremely unstable in PS-PV due to reaction with halogens I-/Br-, and it would be desirable to have stable carbon cathodes on top of thick low resistance ETL for enhancing the stability of PS-PVs. We show that gating such top CNT cathode in ionic liquid, as part of a supercapacitor charged by Vg tunes the Fermi level of CNT by EDL charging, and causes lowering of a barrier at of C60/C70 ETL. Moreover, at higher gating voltage ions further propagates into fullerene by electrochemical n-doping, which increases dramatically PV performance by raising mostly two parameters: Isc and FF, resulting in PCE efficiency raised from 3 % to 11 %. N-doping of ETL strongly enhances charge collection by ETL and CNT raising Isc and lowering series resistance and thus increasing strongly PCE. Surprisingly Voc is not sensitive in PS-PV to external Vg gating, on the contrary, to strongly enhanced Voc in ionically gated organic PV, where it is the main gating effect. This insensitivity of Voc to lowering of the work function of Vg gated CNT electrode is a clear indication that Voc in PS-PV is determined by inner p-i-n junction formation in PS itself, via accumulation of its intrinsic mobile ionic species halogens and cations and their vacancies.
  2. arXiv Physics (arxivphysics@qoto.org)'s status on Monday, 27-Aug-2018 00:34:09 UTC arXiv Physics arXiv Physics

    Femtosecond Synchronization of Optical Clocks Off of a Flying Quadcopter. (arXiv:1808.07870v1 [physics.ins-det]) http://arxiv.org/abs/1808.07870

    In conversation Monday, 27-Aug-2018 00:34:09 UTC from qoto.org permalink

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  3. arXiv Physics (arxivphysics@qoto.org)'s status on Tuesday, 21-Aug-2018 00:44:07 UTC arXiv Physics arXiv Physics

    Simulation of two-boson bound states using arrays of driven-dissipative coupled linear optical resonators. (arXiv:1808.05989v1 [cond-mat.mes-hall]) http://arxiv.org/abs/1808.05989

    In conversation Tuesday, 21-Aug-2018 00:44:07 UTC from qoto.org permalink

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  4. arXiv Physics (arxivphysics@qoto.org)'s status on Monday, 20-Aug-2018 00:34:05 UTC arXiv Physics arXiv Physics

    Atomic iron and titanium in the atmosphere of the exoplanet KELT-9b. (arXiv:1808.05653v1 [astro-ph.EP]) http://arxiv.org/abs/1808.05653

    In conversation Monday, 20-Aug-2018 00:34:05 UTC from qoto.org permalink

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  5. arXiv Physics (arxivphysics@qoto.org)'s status on Thursday, 16-Aug-2018 00:34:08 UTC arXiv Physics arXiv Physics

    Microscopic Origin of Regeneration Noise in Relaxation Oscillator and its Macroscopic Circuit Manifestation. (arXiv:1808.04851v1 [cond-mat.stat-mech]) http://arxiv.org/abs/1808.04851

    In conversation Thursday, 16-Aug-2018 00:34:08 UTC from qoto.org permalink

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  6. arXiv Physics (arxivphysics@qoto.org)'s status on Tuesday, 31-Jul-2018 00:54:03 UTC arXiv Physics arXiv Physics

    Phase noise cancellation in polarisation-maintaining fibre links. (arXiv:1807.10818v1 [physics.ins-det]) http://arxiv.org/abs/1807.10818

    In conversation Tuesday, 31-Jul-2018 00:54:03 UTC from qoto.org permalink

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  7. arXiv Physics (arxivphysics@qoto.org)'s status on Monday, 16-Jul-2018 00:34:06 UTC arXiv Physics arXiv Physics

    Negative Viscosity and Eddy Flow of Imbalanced Electron-Hole Liquid in Graphene. (arXiv:1807.04770v1 [cond-mat.mes-hall]) http://arxiv.org/abs/1807.04770

    In conversation Monday, 16-Jul-2018 00:34:06 UTC from qoto.org permalink

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    A feed of publications on arXiv on the subject of Physics. #Physics #Math #Mathematics #Maths #Science #arXiv #News #PeerReview

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