Fast extraction of front ribbon resistance of silicon photovoltaic modules using electroluminescence imaging

Rajput, Amit Singh; Rodríguez-Gallegos, Carlos D.; Nalluri, Srinath; Raj, Samuel Paul; Aberle, Armin G.

doi:10.1016/j.solener.2019.11.013

Cited by 12 publications

(8 citation statements)

References 24 publications

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“…This section describes the carrier transport process after a finger is broken. From the perspective of solar cell carrier transport, the photo‐generated current moves laterally on the surface of the cell, is collected by the finger, flows to the busbar, and finally the carriers are drawn out of the solar cell through the bussing ribbon 36,37 . Figure 1 shows the schematic diagram of the carrier transport in the fracture of a finger.…”

Section: Carrier Transport Process and Model Of Finger Fracturementioning

confidence: 99%

“…From the perspective of solar cell carrier transport, the photo-generated current moves laterally on the surface of the cell, is collected by the finger, flows to the busbar, and finally the carriers are drawn out of the solar cell through the bussing ribbon. 36,37 Figure 1 shows the schematic diagram of the carrier transport in the fracture of a finger. The carriers of the finger are considered to be separated from the middle of the space, where they move to the adjacent finger and transport to the busbar through the finger.…”

Section: Carrier Transport Process and Model Of Finger Fracturementioning

confidence: 99%

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Study on the effect of finger fracture characteristics on the performance of crystalline silicon solar cell

Yang

et al. 2022

Intl J of Energy Research

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SUMMARY In this study, we established the relationship between the finger fracture position, finger fracture size and series resistance, and systematically analyzed the influence of the characteristics of finger fracture. Based on the carrier transport modes of the finger fracture, we distinguished the types of finger fracture, viz the area A‐type and the area B‐type and characteristic of finger fracture. The results showed that the closer the finger fracture was to the busbar, the greater the impact on the solar cell was for area A‐type finger fractures. The size of the finger fracture had no effect on the performance of the solar cell. The area B‐type finger fracture differed from the area A‐type finger fracture. The larger the finger fracture size was, the greater the drop in the solar cell power became. However, the position of the area B‐type finger fracture had no effect on the power of the solar cell. The contributions of four characteristics of finger fractures (total number of finger fractures, number of finger fracture groups, sizes of finger fractures, and positions of finger fractures) on the losses of the solar cells were 74.20%, 25.55%, 0.15%, and 0.10%, respectively. Revealing that the relationship between the finger fracture characteristics and the solar cell not only enables the calculation of the impact of a single factor of a finger fracture on a solar cell but also allows the design of the fingers of the solar cell to be improved based on the calculation results. Highlights According to the different carrier transport modes, the finger fracture types were distinguished, namely the area A‐type and the area B‐type. The influence of the finger fracture type (the area A‐type and the area B‐type) on the power of photovoltaic modules was studied. The contributions of four characteristics of finger fractures (total number of finger fractures, number of finger fracture groups, sizes of finger fractures, and positions of finger fractures) on the losses of the solar cells were 74.20%, 25.55%, 0.15%, and 0.10%, respectively.

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Section: Carrier Transport Process and Model Of Finger Fracturementioning

confidence: 99%

Section: Carrier Transport Process and Model Of Finger Fracturementioning

confidence: 99%

Study on the effect of finger fracture characteristics on the performance of crystalline silicon solar cell

Yang

et al. 2022

Intl J of Energy Research

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“…[26] and also several cells contain cracks (A6, B6, C4, etc.) [25][26][27][28][29][30]. Figure 9 shows the electroluminescence image of a solar panel (PV41140) that failed to meet the expected power level.…”

Section: Electroluminescence Testmentioning

confidence: 99%

“…[26] and also several cells contain cracks (A6, B6, C4, etc.) [25][26][27][28][29][30]. Figure 10 shows an electroluminescence snapping of a solar panel (PV64260) show ing signs of material defect due to dust deposition.…”

Section: Electroluminescence Testmentioning

confidence: 99%

Condition Assessment of Solar Modules by Flash Test and Electroluminescence Test

et al. 2021

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The Hungarian society and the Hungarian state are constantly increasing their solar capacity. More and more solar power plants are being put into operation. The largest of these has a 100 MW peak capacity. Such power plants do not require constant maintenance. However, in the case of low productivity, a conditional assessment is required. The reason for production loss can also be manufacturing, installation, and operational errors. A flying drone was used for finding failures by thermographic scouting. Furthermore, electroluminescent (EL) and flash tests give a comprehensive view of the real state of the modules in a mobile laboratory. We had the opportunity to summarize these test results of more than a thousand modules operating in a solar power plant. The report on the power plant shows that a significant part of the modules became unusable in a short time. After four years, 10% of the 260 Wp modules suffered a performance reduction of more than 10%.

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“…As a result, the solar generation market requires high-efficiency modules to generate power in a limited space. However, conventional PV modules are manufactured by connecting 6-inch solar cells with metal ribbons, and because this type of system requires space for installing insulation between solar cells, these modules experience spatial output loss [6,7]. The shingled technology of PV modules involves dividing each solar cell into a 3-6 pattern, applying an electrically conductive adhesives (ECA) to the front side of the divided cell, and bonding it to the rear side of another divided cell [8,9].…”

Section: Introductionmentioning

confidence: 99%

Simulation-Based Shading Loss Analysis of a Shingled String for High-Density Photovoltaic Modules

et al. 2021

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Shingled photovoltaic (PV) modules with increased output have attracted growing interest compared to conventional PV modules. However, the area per unit solar cell of shingled PV modules is smaller because these modules are manufactured by dividing and bonding solar cells, which means that shingled PV modules can easily have inferior shading characteristics. Therefore, analysis of the extent to which the shadow affects the output loss is essential, and the circuit needs to be designed accordingly. In this study, the loss resulting from the shading of the shingled string used to manufacture the shingled module was analyzed using simulation. A divided cell was modeled using a double-diode model, and a shingled string was formed by connecting the cell in series. The shading pattern was simulated according to the shading ratio of the vertical and horizontal patterns, and in the case of the shingled string, greater losses occurred in the vertical direction than the horizontal direction. In addition, it was modularized and compared with a conventional PV module and a shingled PV module. The results confirmed that the shingled PV module delivered higher shading output than the conventional PV module in less shade, and the result of the shading characteristic simulation of the shingled PV module was confirmed to be accurate within an error of 1%.

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Fast extraction of front ribbon resistance of silicon photovoltaic modules using electroluminescence imaging

Cited by 12 publications

References 24 publications

Study on the effect of finger fracture characteristics on the performance of crystalline silicon solar cell

Study on the effect of finger fracture characteristics on the performance of crystalline silicon solar cell

Condition Assessment of Solar Modules by Flash Test and Electroluminescence Test

Simulation-Based Shading Loss Analysis of a Shingled String for High-Density Photovoltaic Modules

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