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Origin of apparent light-enhanced and negative capacitance in perovskite solar cells

Publications associées (33)

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Effect of state feedback coupling on the transient performance of voltage source inverters with LC filter

Federico De Bosio

State feedback coupling between the capacitor voltage and inductor current deteriorates notably the performance during transients of voltage and current regulators in stand-alone systems based on voltage source inverters. A decoupling technique is proposed ...

Ieee2016

Graphene quantum capacitors for high-Q tunable LC-tanks for RF ICs

Juan Ramon Mosig, Mihai Adrian Ionescu, Clara-Fausta Moldovan, Michele Tamagnone, Wolfgang Amadeus Vitale

We propose and characterize graphene quantum capacitors, tunable with voltage by the control of their charge density, for tunable LC tanks as essential building blocks for Radio-Frequency (RF) functions in densely integrated circuits. We fabricate and inve ...

IEEE2016

Electron Kinetics in Dye Sensitized Solar Cells Employing Anatase with (101) and (001) Facets

Michael Graetzel, Mohammad Khaja Nazeeruddin, Pascal Comte, Ladislav Kavan, Thomas Moehl, Aswani Yella

Two phase-pure nanocrystalline anatase materials differing in the exposed crystal facets (001) or (101) are studied by electrochemical impedance spectroscopy and by transient photovoltage and photocurrent decay in dye sensitized solar cells. A larger chemi ...

Elsevier2015

Capacitance behavior of InAlN Schottky diodes in presence of large concentrations of shallow and deep states related to oxygen

Nicolas Grandjean, Jean-François Carlin, Marcel Py, Lorenzo Lugani

The capacitance-voltage-temperature characteristics of nonintentionally doped In0.16Al0.84 N/n+- GaN Schottky diodes were measured at 1 MHz and in the 90–400 K range. They are discussed in the framework of existing theories, which properly treat the Poiss ...

American Institute of Physics2015

A low power SAR logic-based resistive sensor readout circuit is proposed. A high sensitivity thermistor is used for local temperature measurements. The need for a low-noise front-end voltage amplifier is avoided by employing time-domain operation. In each ...

Institute of Electrical and Electronics Engineers2014

We present a transmission line model for TM plasmon propagation along a graphene strip, and derive closed-form expressions for the kinetic and Faraday inductance, resistance, and electrostatic capacitance of the equivalent circuit as a function of graphene ...

2013

An adaptive system for the suppression of vibration transmission using a single piezoelectric actuator shunted by a negative capacitance circuit is presented. It is known that by using a negative-capacitance shunt, the spring constant of a piezoelectric ac ...

Ieee-Inst Electrical Electronics Engineers Inc2012

It has been already proved that electrical capacitance increases at the electrode surface due to binding of highly charged antigens on the biointerface. In this paper, this capacitance change was used to demonstrate a novel detection for cardiac troponin I ...

2012

Single Phase Resonant LC Circuit Using a Bank of Self-Switched Capacitors

Alfred Rufer, Daniel Siemaszko, Christian Rod

This paper presents a preliminary work on the feeding of an AC dipole using a resonant circuit with a varying resonant frequency. A single phase LC oscillator containing a variable capacitor is fed by a wide band amplifier or a voltage source inverter. For ...

Institute of Electrical and Electronics Engineers2011

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This paper presents a novel high-frequency tunable band-stop filter concept based on a single MEMS capacitive shunt device which uses meander arm anchoring inductors and with a total size of 300 × 600 μm. Tuning ranges of the central frequency in the order ...

Elsevier2010