Edge recombination analysis of silicon solar cells using photoluminescence measurements

Stolzenburg, Hannah; Fell, Andreas; Schindler, Florian; Kwapil, Wolfram; Richter, Armin; Baliozian, Puzant; Schubert, Martin C.

doi:10.1063/1.5123822

Cited by 10 publications

(2 citation statements)

References 6 publications

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“…Fraunhofer ISE focused on injection dependent photoluminescence (PL( I )) measurements of precursors, host cells, and cut cells and simulated the circumstances in Quokka3. The approach distinguishes between cut bulk and cut junction recombination described by edge surface recombination velocity ( S eff,edge ) and dark saturation current ( J 02,edge ), respectively 45 . This allows evaluation of different cutting techniques as well as a sensitivity study of performance parameters' decrease due to different cut edges.…”

Section: Resultsmentioning

confidence: 99%

“…The approach distinguishes between cut bulk and cut junction recombination described by edge surface recombination velocity (S eff,edge ) and dark saturation current (J 02,edge ), respectively. 45 This allows evaluation of different cutting techniques as well as a sensitivity study of performance parameters' decrease due to different cut edges. ISC also used PL(I) and Quokka3 simulations but focused on IBC cells and a variety of different cut cell sizes (1/1, 1/2, 1/4, 1/8) including 1 or 2 side cut and cut over n + or p + region.…”

Section: Advanced Characterization Of Edge Losses Before and After Ed...mentioning

confidence: 99%

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Overview of key results achieved in H2020 HighLite project helping to raise the EU PV industries' competitiveness

Tous

Govaert

Harrison

et al. 2023

Progress in Photovoltaics

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The EU crystalline silicon (c‐Si) PV manufacturing industry has faced strong foreign competition in the last decade. To strive in this competitive environment and differentiate itself from the competition, the EU c‐Si PV manufacturing industry needs to (1) focus on highly performing c‐Si PV technologies, (2) include sustainability by design, and (3) develop differentiated PV module designs for a broad range of PV applications to tap into rapidly growing existing and new markets. This is precisely the aim of the 3.5 years long H2020 funded HighLite project, which started in October 2019 under the work program LC‐SC3‐RES‐15‐2019: Increase the competitiveness of the EU PV manufacturing industry. To achieve this goal, the HighLite project focuses on bringing two advanced PV module designs and the related manufacturing solutions to higher technology readiness levels (TRL). The first module design aims to combine the benefits of n‐type silicon heterojunction (SHJ) cells (high efficiency and bifaciality potential, improved sustainability, rapidly growing supply chain in the EU) with the ones of shingle assembly (higher packing density, improved modularity, and excellent aesthetics). The second module design is based on the assembly of low‐cost industrial interdigitated back‐contact (IBC) cells cut in half or smaller, which is interesting to improve module efficiencies and increase modularity (key for application in buildings, vehicles, etc.). This contribution provides an overview of the key results achieved so far by the HighLite project partners and discusses their relevance to help raise the EU PV industries' competitiveness. We report on promising high‐efficiency industrial cell results (24.1% SHJ cell with a shingle layout and 23.9% IBC cell with passivated contacts), novel approaches for high‐throughput laser cutting and edge re‐passivation, module designs for BAPV, BIPV, and VIPV applications passing extended testing, and first 1‐year outdoor monitoring results compared with benchmark products.

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Section: Resultsmentioning

confidence: 99%

Section: Advanced Characterization Of Edge Losses Before and After Ed...mentioning

confidence: 99%

Overview of key results achieved in H2020 HighLite project helping to raise the EU PV industries' competitiveness

Tous

Govaert

Harrison

et al. 2023

Progress in Photovoltaics

Self Cite

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Simulation Analyses of High‐Efficiency Monolithic Solar Cells with Reduced Shunt and Lateral Forward Bias Current

Xue

Goryll

Bowden

2022

Physica Status Solidi (a)

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Larger solar cells are preferred for higher power output. However, they produce higher current and lead to higher ohmic loss. This loss has prompted manufacturers to laser cut cells into halved cells, resulting in lower current, higher voltage string‐cells. While these techniques reduce ohmic loss, they introduce cutting‐edge recombination. The monolithic solar cell resembles halved cell but without requiring cutting the original cell into strings of cells which saved the cutting‐edge recombination loss. However, we observed that the interconnection of base regions of the string‐cells on the same wafer leads to problems such as lateral forward bias current, resulting in severe degradation of the fill factor (FF) and open‐circuit voltage (VOC). Solutions to these issues are proposed including depassivated surfaces between string‐cells, optimized spacing between the string‐cells, lowered base doping density, thinner wafers, and shading regions between the string‐cells. According to simulation results, these methods could increase the efficiency of the monolithic cell to very close to the baseline cell. With the consideration of the reduced shading, ohmic loss, and module blank areas on the cell‐to‐module process, the efficiency of a module with monolithic cells could exceed that of a module with baseline cells or a module of halved/shingling cells.

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Addressing separation and edge passivation challenges for high efficiency shingle heterojunction solar cells

Martel

Albaric

Harrison

et al. 2023

Solar Energy Materials and Solar Cells

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Edge recombination analysis of silicon solar cells using photoluminescence measurements

Cited by 10 publications

References 6 publications

Overview of key results achieved in H2020 HighLite project helping to raise the EU PV industries' competitiveness

Overview of key results achieved in H2020 HighLite project helping to raise the EU PV industries' competitiveness

Simulation Analyses of High‐Efficiency Monolithic Solar Cells with Reduced Shunt and Lateral Forward Bias Current

Addressing separation and edge passivation challenges for high efficiency shingle heterojunction solar cells

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