scholarly journals Determination of bimolecular recombination constants in organic double-injection devices using impedance spectroscopy

2019 ◽  
Vol 114 (12) ◽  
pp. 123301 ◽  
Author(s):  
Makoto Takada ◽  
Takahiro Mayumi ◽  
Takashi Nagase ◽  
Takashi Kobayashi ◽  
Hiroyoshi Naito
Keyword(s):  
Impedance Spectroscopy ◽  
Double Injection ◽  
Bimolecular Recombination

Determination of Electrically Active Defect Profiles in Semiconductors Using a Photoelectrochemical Technique

1986 ◽  
Vol 82 ◽  
Author(s):  
F.D. Gealy ◽  
H.L. Tuller
Keyword(s):  
Impedance Spectroscopy ◽  
Liquid Electrolyte ◽  
Profile Measurement ◽  
Acceptor Concentration ◽  
Defect Profile ◽  
Profile Depth ◽  
Charge Capacitance ◽  
Substitutional Impurities ◽  
Good Agreement

ABSTRACTElectrically active defects are common in semiconductors. Such defects include easily ionized substitutional impurities, vacancies, and interstitials which can act as shallow donors or acceptors. If one type of defect predominates, its concentration corresponds directly to the local donor or acceptor concentration. Consequently, measurement of a carrier profile in a nonhomogeneous semiconductor is effectively the same as measurement of the defect profile.The photoelectrochemical profiling technique allows for carrier profile measurement with submicrometer spatial resolution. The sample is profiled by photoetching, then carrier measurement, and iterating this procedure until the desired profile depth is obtained.Derivation of the space charge capacitance by impedance spectroscopy is discussed. An analysis of the P-doped Si-liquid electrolyte interface is presented. Phosphorous diffusivity coefficients in good agreement with literature values are derived from photoelectrochemical derived profiles.

scholarly journals Determination of carrier lifetime and mobility in colloidal quantum dot films via impedance spectroscopy

2014 ◽  
Vol 104 (6) ◽  
pp. 063504 ◽  
Author(s):  
Arup K. Rath ◽  
Tania Lasanta ◽  
Maria Bernechea ◽  
Silke L. Diedenhofen ◽  
Gerasimos Konstantatos
Keyword(s):  
Impedance Spectroscopy ◽  
Quantum Dot ◽  
Carrier Lifetime ◽  
Colloidal Quantum Dot

scholarly journals Electrochemical Impedance Spectroscopy for the Measurement of the Corrosion Rate of Magnesium Alloys: Brief Review and Challenges

Metals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 775 ◽  
Author(s):  
Sebastián Feliu
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Corrosion Rate ◽  
Electrochemical Impedance ◽  
State Of The Art ◽  
Point Of View ◽  
Reliable Determination ◽  
Corrosion Rates ◽  
Non Destructive

From a technological point of view, measurement of the corrosion rate of magnesium (Mg) and its alloys is critical for lifetime predictions of Mg-based structures and for comparative assessments of their corrosion protection ability. Whilst weight loss, hydrogen evolution, and polarization curves methods are frequently used for measuring the corrosion rate, the determination of values by electrochemical impedance spectroscopy (EIS) is relatively scarce and has only been realized recently. This technique seems to be the most suitable for monitoring corrosion rate values due to its “non-destructive” character, its reproducibility, and its reliable determination of small corrosion rates, much lower than those measured by other techniques. This review aims to picture the state-of-the-art technique of using EIS for measuring the corrosion rate of Mg. This paper starts by introducing some fundamental aspects of the most widely used methods for monitoring the corrosion rate of Mg/Mg alloy and continues by briefly explaining some of the fundamental concepts surrounding EIS, which are essential for the user to be able to understand how to interpret the EIS spectra. Lastly, these concepts are applied, and different approaches that have been proposed to obtain quantitative values of corrosion rate since the 1990s are discussed.

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