Thermally Stimulated Polarization and Depolarization Currents

Chen, R.

doi:10.1016/b978-0-08-022930-0.50009-8

Cited by 9 publications

(3 citation statements)

References 69 publications

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“…The background current curve measured without trap filling at the liquid nitrogen temperature was confirmed to be negligible compared with the TSC levels, indicating that the measured TSC curves originate from carriers released from traps. The trap depths and densities were calculated from the TSC curves using the methods reported in the literature. ,, …”

Section: Methodsmentioning

confidence: 99%

Centrifugal-Coated Quasi-Two-Dimensional Perovskite CsPb₂Br₅ Films for Efficient and Stable Light-Emitting Diodes

Qin

Matsushima

Sandanayaka

et al. 2017

J. Phys. Chem. Lett.

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The optical, structural, and electroluminescent (EL) characteristics of pure quasi-2D CsPbBr were reported. We fabricated continuous, compact, well-crystallized CsPbBr films by centrifugal coating from a colloidal solution containing CsPbBr nanoparticles. The centrifugal-coated CsPbBr films have a photoluminescence quantum yield (PLQY) of ∼35% because of its low-dimensional structure. Taking advantage of the high PLQY, we fabricated perovskite light-emitting diodes (PeLEDs) with a centrifugal-coated CsPbBr emitting layer exhibiting bright green EL, a maximum luminance of 7317 cd m, an and external quantum efficiency of 1.1%. Additionally, the EL color could be changed easily from green to red using a halogen exchange method. The half lifetime of our CsPbBr PeLEDs reached around 6 h under continuous operation at 10 mA cm.

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Section: Methodsmentioning

confidence: 99%

Centrifugal-Coated Quasi-Two-Dimensional Perovskite CsPb₂Br₅ Films for Efficient and Stable Light-Emitting Diodes

Qin

Matsushima

Sandanayaka

et al. 2017

J. Phys. Chem. Lett.

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“…Later, their thermal depolarization will give rise to a spectra where the discharge current is recorded in terms of temperature. This technique is known as thermally stimulated depolarization currents (TSDC) [1].…”

Section: Introductionmentioning

confidence: 99%

“…TSDC has been extensively applied to the study of dielectric relaxation in a large number of materials, many of them polymers. Presently, there are excellent treateses on this subject [1][2][3][4]. The application of this technique to XL-PE gives spectra of certain complexity.…”

Section: Introductionmentioning

confidence: 99%

A Model to Explain the TSDC Spectrum of XLPE Insulation in Mid Voltage Cables Based on a Virtual Electrode

Belana

Diego

Orrit

et al. 2007

2007 IEEE International Conference on Solid Dielectrics

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The analysis by TSDC of a large variety of cables subjected to long annealing times, has resulted in spectra that sometimes show an oscillation of the current peak observed at 99°C. This process has been observed in some cables only and it is scarcely reproducible. We present an explanation of this behavior based on the formation of charge packets and some other assumptions: charge injection occurs mainly from the negative electrode, and chemical components that act as trapping centers are diffused continously from the semiconducting layers into the bulk during annealing. When the field is applied the negative electrode injects charge that get trapped in these centers, so that a virtual electrode is formed. The electric field created by this layer results in a decrease of the field in the gap between the injecting and virtual electrodes, preventing new charge injection. On the other hand, during polarization the virtual electrode shifts through the insulation bulk towards the opposite electrode. This layer that acts as a virtual electrode becomes neutral by means of recombination when it reaches the opposite electrode, so that the electric field in the region between the electrodes recovers its initial value and the whole process happens again cyclically. This model can explain the observed TSDC oscillating spectra of annealed samples. It can also explain why the oscillations can not be observed in most cases.

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Degradation Mechanisms of Solution‐Processed Planar Perovskite Solar Cells: Thermally Stimulated Current Measurement for Analysis of Carrier Traps

et al. 2015

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Thermally Stimulated Polarization and Depolarization Currents

Cited by 9 publications

References 69 publications

Centrifugal-Coated Quasi-Two-Dimensional Perovskite CsPb₂Br₅ Films for Efficient and Stable Light-Emitting Diodes

Centrifugal-Coated Quasi-Two-Dimensional Perovskite CsPb₂Br₅ Films for Efficient and Stable Light-Emitting Diodes

A Model to Explain the TSDC Spectrum of XLPE Insulation in Mid Voltage Cables Based on a Virtual Electrode

Degradation Mechanisms of Solution‐Processed Planar Perovskite Solar Cells: Thermally Stimulated Current Measurement for Analysis of Carrier Traps

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Thermally Stimulated Polarization and Depolarization Currents

Cited by 9 publications

References 69 publications

Centrifugal-Coated Quasi-Two-Dimensional Perovskite CsPb2Br5 Films for Efficient and Stable Light-Emitting Diodes

Centrifugal-Coated Quasi-Two-Dimensional Perovskite CsPb2Br5 Films for Efficient and Stable Light-Emitting Diodes

A Model to Explain the TSDC Spectrum of XLPE Insulation in Mid Voltage Cables Based on a Virtual Electrode

Degradation Mechanisms of Solution‐Processed Planar Perovskite Solar Cells: Thermally Stimulated Current Measurement for Analysis of Carrier Traps

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Centrifugal-Coated Quasi-Two-Dimensional Perovskite CsPb₂Br₅ Films for Efficient and Stable Light-Emitting Diodes

Centrifugal-Coated Quasi-Two-Dimensional Perovskite CsPb₂Br₅ Films for Efficient and Stable Light-Emitting Diodes