Impedance spectroscopy of amorphous/crystalline silicon heterojunction solar cells under dark and illumination

Panigrahi, Jagannath; Pandey, Ashutosh Kumar; Bhattacharya, Shrestha; Pal, Alok K.; Mandal, Sourav; Komarala, Vamsi K.

doi:10.1016/j.solener.2023.05.030

Cited by 3 publications

(2 citation statements)

References 39 publications

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“…The results showed the importance of IS in investigating dynamic characteristics of high-efficiency c-Si solar cells. Panigrahi et al employed IS to analyze the electrical characteristics of solar cells with an a-Si:H/c-Si heterojunction (SHJ) both in the dark and under illumination [26]. According to their findings, the required dispersion parameter for modeling the IS of an SHJ cell indicated a broad distribution of time constants, i.e., a shallow distribution of exponential tailing trap centers in the amorphous layer and/or at the c-Si/a-Si:H interface.…”

Section: Introductionmentioning

confidence: 99%

Characterization of a Heterojunction Silicon Solar Cell by Means of Impedance Spectroscopy

Aimaganbetov,

Yerezhep,

Kishkenebayev

et al. 2024

Micromachines

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Impedance spectroscopy provides relevant knowledge on the recombination and extraction of photogenerated charge carriers in various types of photovoltaic devices. In particular, this method is of great benefit to the study of crystalline silicon (c-Si)-based solar cells, a market-dominating commercial technology, for example, in terms of the comparison of various types of c-Si devices. This study investigates the dark and light electrophysical characteristics of a heterojunction silicon solar cell fabricated using plasma-enhanced chemical vapor deposition. The measurements are performed at various applied biases, enabling the determination of complex resistance, characteristic time, capacitive response and impurity concentration within the semiconductor junction and to correlate them with the device performance. In addition, the impedance spectra of the studied cell were investigated as a function of temperature. Studies of the frequency and temperature dependences of capacitance do not reveal a significant presence of thermally activated centers of free carrier capture, concomitant with a very small value of the activation energy extracted from an Arrhenius-type analysis. This leads to a conclusion that these centers are likely not impactful on the device operation and efficiency.

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Section: Introductionmentioning

confidence: 99%

Characterization of a Heterojunction Silicon Solar Cell by Means of Impedance Spectroscopy

Aimaganbetov,

Yerezhep,

Kishkenebayev

et al. 2024

Micromachines

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show abstract

“…6 For a better understanding of the non-ideal response of the impedance spectra, represented by a distorted semicircle in the Nyquist domain, models with physical descriptions and better fitting of the distortion have been suggested. Several potential properties such as surface roughness, 10,11 porous materials, 12,13 adsorbed intermediates, 14,15 trapping and relaxing process at junction interface, 16 and grain boundaries 17,18 have been reported according to the CPE concept. Models based on the distributions of physical properties in one dimension have also been proposed to understand the non-ideal impedance spectra of various systems, including polymer coating, according to the distributions of the dielectric constant, 19 electrical resistivity, [20][21][22] and surface reactivity, 23 which are attributed to the distributions of time constants.…”

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confidence: 99%

Impedance Response Influenced by Variability in the Random Distribution of Physical Properties of Coated Materials in Two-Dimensional Space

Cho,

Kim,

Castaneda

2023

J. Electrochem. Soc.

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Heterogeneous physical characteristics of a system featuring a single-layer film on a metallic surface have been explored via its impedance response. The Nyquist plot showed a distorted semicircle, indicative of the system's unique distribution characteristics. Utilizing a copula-based probability method, a two-dimensional deterministic impedance model was successfully integrated, accounting for spatial physical properties such as permittivity and electrical conductivity. This strategy enabled in-depth exploration and mechanistic quantification of a broad spectrum of properties. A quantitative understanding of impedance signal alterations, characterized by normally or log-normally correlated variables, was achieved through the variation in aspect ratio and characteristic frequency of the impedance spectra. Log-normally distributed electrical properties provided a superior representation of the distorted impedance spectra. As coefficient of variation values fluctuated, the aspect ratio and characteristic frequency showed heightened sensitivity to log-normal permittivity compared to log-normal electrical conductivity. Notably, a marked positive linear correlation between electrical properties resulted in an impedance response that approximated perfect semicircular spectra. The variability in the electrical properties' distribution was demonstrated by considering the correlation coefficient between electrical conductivity and the z-direction position. The highest aspect ratio of the impedance spectra was observed when the electrical conductivity was randomly distributed across the z-direction space.

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Investigation of bandgap grading on performances of perovskite solar cell using SCAPS-1D and impedance spectroscopy

Mortadi,

El Hafidi,

Nasrellah

et al. 2024

Solar Energy Advances

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Impedance spectroscopy of amorphous/crystalline silicon heterojunction solar cells under dark and illumination

Cited by 3 publications

References 39 publications

Characterization of a Heterojunction Silicon Solar Cell by Means of Impedance Spectroscopy

Characterization of a Heterojunction Silicon Solar Cell by Means of Impedance Spectroscopy

Impedance Response Influenced by Variability in the Random Distribution of Physical Properties of Coated Materials in Two-Dimensional Space

Investigation of bandgap grading on performances of perovskite solar cell using SCAPS-1D and impedance spectroscopy

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