Contacting Interdigitated Back-Contact Solar Cells With Four Busbars for Precise Current–Voltage Measurements Under Standard Testing Conditions

Schinke, Carsten; Kiefer, Fabian; Offer, Matthias; Hinken, David; Schmidt, Arne; Harder, Nils‐Peter; Bock, Robert; Brendemühl, Till; Schmidt, Jan; Bothe, Karsten; Brendel, Rolf

doi:10.1109/jphotov.2012.2195637

Cited by 9 publications

(6 citation statements)

References 3 publications

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“…Bu çalışmada yenilikçi bir tasarımını ortaya konulmuştur [7] Bara temas geometrisine sahip IBC firması tarafından üretilen güneş pilleri alanının arttırılması, daha uzun parmakların kullanılmasını gerektirir. Metalizasyon kalınlığı sabit tutulursa parmak direnci artacağı gözlenmiştir [10]. İnce bir metalleşmeyi muhafaza etmek için, kontak başına baraların sayısını artırmak faydalı olduğu görülmüştür.…”

Section: Introductionunclassified

Investigation of Busbar Effect on Performance of Solar Cells

Ekinci

2018

Çukurova Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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ÖzGüneş ışınımın fotovoltaik paneldeki güneş hücrelerinde elektrik enerjisine dönüştürme işlemi, en bilinen ve kullanılan yenilenebilir enerjiden elektrik üretim yöntemidir. Bir fotovoltaik sistemin kalbi güneş modülüdür. Birçok güneş hücresi lehimle ile bir araya getirilerek bir fotovoltaik modülü oluşturulur. Modülde elektrik üretimi, çok katmanlı yarı iletken malzemeden oluşan güneş hücreleri tarafından üretilir. Güneş ışınımları hücrelerin üzerine geldiği zaman bu katmanlar arasındaki elektromotor kuvveti oluşturarak elektrik akışını meydana getirir. Güneş ışınımı şiddeti ne kadar yüksek olursa elektrik akışı da o kadar yüksek olur. Bu çalışmada, farklı ışınım değerlerinde güneş hücresindeki baraların sayısının elektrik üretim performansına etkisi MATLAB programı kullanılarak modellenmiş ve deneysel sonuçlarla ayrıntılı bir şekilde etkisi araştırılmıştır. Bu çalışma ile güneş hücrelerindeki baranın elektrik üretimine etkisi açık bir şekilde ortaya koyularak bu alanda çalışan araştırmacılara yön verilmesi amaçlanmıştır. Ayrıca, güneş enerjisi uygulamalarında çok baralı güneş hücrelerine geçilerek elektrik üretim performansının artırılması yanı sıra güneş hücrelerinde zamanla oluşan olumsuzlukların da azaltılması sağlanacaktır. Benzetim sonuçları ile deneysel çalışma kıyaslandığında; voltaj değerlerinde çok yakın sonuçlar elde edilirken akım değerlerinde biraz farklılık görülmektedir. Bu farklılık, seçilen direnç değerinden kaynaklanmaktadır. AbstractThe transformation of solar radiation into electricity in the solar cells of the photovoltaic panel is the most commonly used and renewable energy production method. A photovoltaic system is the heart of solar module. Many solar cells are combined with solder to form a photovoltaic module. Electricity generation in the module is produced by solar cells consisting of multi-layered semiconducting material. When the sun's rays reach their cells, the electromotive force between these layers occurs and the electric current flows. The higher the intensity of solar radiation, the higher the electric current flow. In this study, the * Sorumlu

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Section: Introductionunclassified

Investigation of Busbar Effect on Performance of Solar Cells

Ekinci

2018

Çukurova Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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“…However, due to the computational effort, the simulation domain is typically limited to a small element of symmetry, which does not account for finger and busbar effects. On the other hand, recently, different authors have shown modelling activities for solar cells, by simulating distributed electrical models [14][15][16]. In [15], two different IBC cell types (with broken and full line contact openings) are investigated by mixing experimental results and electrical simulations performed with a distributed model.…”

Section: Introductionmentioning

confidence: 99%

“…However, the effect of busbars is not accounted for. In [16], a distributed network is used to discuss different contacting schemes for IBC solar cells with four busbars and evaluate their impact on the fill factor evaluation. In [17], an IBC version of a Quokka model is presented, allowing for fast simulations by means of finite volume implementation in MATLAB.…”

Section: Introductionmentioning

confidence: 99%

“…The validity of the model was verified by means of comparison with experimental measurements in the case of a small area (4 cm 2 ) IBC solar cell with two busbars. With respect to [15][16][17][18], we perform a comprehensive study allowing us to investigate large-area (15.6 x 15.6 cm 2 ) IBC solar cell with multiple busbars. Moreover, the influence of important geometrical and electrical properties of the busbars (number, width, soldering pitch, metal sheet resistance) is analyzed.…”

Section: Introductionmentioning

confidence: 99%

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Understanding the Influence of Busbars in Large-Area IBC Solar Cells by Distributed SPICE Simulations

Magnone

Debucquoy

Giaffreda

et al. 2015

IEEE J. Photovoltaics

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In this paper, we model a large-area high-efficiency interdigitated back-contact (IBC) solar cell by means of a distributed electrical network. The simulation tool allows accounting for the distributed resistive effects in diffusions and metallization. The model also considers the electrical shading effect and resistive losses due to both back-surface field (BSF) and emitter busbars. A calibrated model is used to investigate the case of a large-area (15.6 × 15.6 cm2) IBC cell, in which we investigate the influence of key busbar parameters: number of busbars, busbar width, soldering pitch (for module connection), and metal sheet resistance. The predictive simulations allow finding out the optimum number of busbars, arising from a tradeoff between the electrical shading effect due to the BSF busbars and resistive losses due to the emitter busbars and the fingers. Moreover, we show how the distance between soldering points on the metal busbars influences the choice of the busbar width. We found out that if an adequate number (>7) of soldering points is adopted, the busbar width should be kept lower than 0.5 mm. On the other hand, the adoption of a thick Cu-plating (15 μm) leads to an increase of efficiency of 0.2%abs with respect to the case of sputtered Al metal (3 μm thick)

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“…Due to the interruptions of the contact finger grid, the outer busbars have to be located at the wafer edges in order to collect the current of the entire solar cell area. Schinke et al [5] transferred and investigated the single-layer metallization concept for BC-BJ solar cells with an edge length of 156 mm and evaporated contact finger metallization. For screen-printed BC-BJ solar cells, the major challenge for the single-layer concept is the electrical contacting property of the busbar metallization.…”

mentioning

confidence: 99%

Screen-Printed Metallization Concepts for Large-Area Back-Contact Back-Junction Silicon Solar Cells

Hendrichs

Padilla

Walter

et al. 2016

IEEE J. Photovoltaics

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In this study, we investigate three screen-printed metallization concepts for back-contact back-junction silicon solar cells with an edge length of 156 mm: 1) a busbar-less concept with periodically interrupted contact fingers for wire-based interconnection; 2) a single-layer concept with printed busbars and periodically interrupted contact fingers; and 3) a multilayer concept consisting of continuous contact fingers, an insulation layer, and busbar metallization. A comprehensive simulation study is presented for all investigated metallization concepts, yielding their respective performance loss mechanisms. The multilayer approach is found to provide superior conversion efficiencies η, compared with the single-layer approach. For the wire-based concept, we show that contact finger interruptions up to a width of 1 mm have no significant negative impact on cell performance (Δη < 0.1% ab s ). Furthermore, peel force measurements on test structures between soldered cell interconnectors and screen-printed metallization are discussed for the multilayer and the wire-based concept. Successful proof of principles with peel forces exceeding 1 N/mm are demonstrated for both investigated metallization concepts.

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Contacting Interdigitated Back-Contact Solar Cells With Four Busbars for Precise Current–Voltage Measurements Under Standard Testing Conditions

Cited by 9 publications

References 3 publications

Investigation of Busbar Effect on Performance of Solar Cells

Investigation of Busbar Effect on Performance of Solar Cells

Understanding the Influence of Busbars in Large-Area IBC Solar Cells by Distributed SPICE Simulations

Screen-Printed Metallization Concepts for Large-Area Back-Contact Back-Junction Silicon Solar Cells

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