Analytic findings in the electroluminescence characterization of crystalline silicon solar cells

Fuyuki, Takashi; Kondō, Hayato; Kaji, Y.; Ogane, Akiyoshi; Takahashi, Yasuhiro

doi:10.1063/1.2431075

Cited by 115 publications

(51 citation statements)

References 4 publications

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“…Various methods such as photoluminescence (PL), 5 electroluminescence (EL), 6 electron beam induced current (EBIC), 7 and laser beam induced current (LBIC) 8 have been used for investigating solar cells. The PL method detects and images luminescence from a solar cell illuminated by light, and it can visualize the distribution of radiative defects and minority carrier lifetime in a solar cell.…”

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confidence: 99%

Comparison between laser terahertz emission microscope and conventional methods for analysis of polycrystalline silicon solar cell

et al. 2015

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A laser terahertz emission microscope (LTEM) can be used for noncontact inspection to detect the waveforms of photoinduced terahertz emissions from material devices. In this study, we experimentally compared the performance of LTEM with conventional analysis methods, e.g., electroluminescence (EL), photoluminescence (PL), and laser beam induced current (LBIC), as an inspection method for solar cells. The results showed that LTEM was more sensitive to the characteristics of the depletion layer of the polycrystalline solar cell compared with EL, PL, and LBIC and that it could be used as a complementary tool to the conventional analysis methods for a solar cell.

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confidence: 99%

Comparison between laser terahertz emission microscope and conventional methods for analysis of polycrystalline silicon solar cell

et al. 2015

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“…The resultant EL emmision is in proportion to the total excess minority carrier density of the material [22]. The reduced minority carrier density regions can be spatially detected as lower intensity regions or dark spots, which can be easily visualised.…”

Section: Methodsmentioning

confidence: 99%

Characterization of Degradation under Standard Environmental Testing Methods for Crystalline Silicon Photovoltaic Modules

Kumar¹,

Roy²,

Gupta³

2017

IJPER

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Abstract. Standard environmental tests have been developed for photovoltaic (PV) modules to assess the reliability of their performance in a short period of time. These tests generate different modes of degradation by combination of environmental stresses. There is a need to differentiate between the standard tests on the basis of severity. This helps to understand the individual and combined degradation effect occurred due to temperature and humidity stress, which is the focus of the present study. In this work, standard tests viz. humidity freeze (HF), thermal cycling (TC) and damp heat test (DH) have been performed on different batches of multi-crystalline silicon PV modules. One batch of modules was subjected to combined tests wherein the three tests were performed in succession and the other batch was separately subjected to the individual tests. Spatial characterization techniques i.e. electroluminescence (EL) and dark lock-in-thermography (DLIT) imaging were used in tandem with illuminated current voltage (I-V) analysis for detection and quantification of degradation under the standard tests. The information obtained from the comparison between the different tests, on a scale of time and severity can be helpful for preliminary investigations performed on effects of the common environmental degradation factors like high temperature, high humidity and thermal ramping. The presented findings can further aid research and development on different aspects of reliability testing on PV module performance under environmental effects.

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“…In particular, attention was paid to fill factor (FF) behaviors because an increase in series resistance and a decrease in shunt resistance markedly affect FF characteristics. Electroluminescence (EL) measurements 19) and photoluminescence (PL) measurements 20) were also carried out to detect visually the series resistance increase (by EL imaging) and the shunt resistance decrease (by PL imaging). The acetic acid concentration in the EVA encapsulant of the sample tested was measured by ion chromatography (IC) using an ultrapure water solvent solution in which acetic acid was eluted from the EVA encapsulant at approximately 90°C for 2 h.…”

Section: Experimental Methodsmentioning

confidence: 99%

Development of highly efficient, long-term reliable crystalline silicon solar cells and modules by low-cost mass production

Irie¹,

Tanabe²,

Atobe³

et al. 2018

Jpn. J. Appl. Phys.

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To reduce photovoltaic (PV) power generation costs, the reduction of PV module manufacturing costs, the improvement of cell and module efficiencies, and the long-term output power warranty of PV modules are necessary. Using the high-quality, low-cost crystal growth technology, we developed a high-quality casting process by the seed-cast method. Using a seed-cast wafer, an efficiency of 20.54% has been obtained with passivated emitter and rear cells (PERCs). The ohmic contact degradation of front electrodes and potential-induced degradation are the typical modes that significantly affect the module lifetime. Considering the field stresses induced by ultraviolet light, heat and humidity (H&H), and the electrical potential difference, sequentially combined stress tests of small modules and additional stress tests of field-aged modules are performed. The test results for the modules fabricated using our technology indicated that the modules have a sufficiently long lifetime of more than 30 years and are potential-induced degradation (PID)-free under these stresses in Japanese domestic environments.

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Analytic findings in the electroluminescence characterization of crystalline silicon solar cells

Cited by 115 publications

References 4 publications

Comparison between laser terahertz emission microscope and conventional methods for analysis of polycrystalline silicon solar cell

Comparison between laser terahertz emission microscope and conventional methods for analysis of polycrystalline silicon solar cell

Characterization of Degradation under Standard Environmental Testing Methods for Crystalline Silicon Photovoltaic Modules

Development of highly efficient, long-term reliable crystalline silicon solar cells and modules by low-cost mass production

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