Progress in emitter wrap-through solar cell fabrication on boron doped Czochralski-grown silicon

Hermann, Sonja; Merkle, Agnes; Ulzhöfer, Christian; Dorn, Silke; Feilhaber, Ilka; Berger, M. N.; Friedrich, Thomas; Brendemühl, Till; Harder, Nils‐Peter; Ehlers, Lotte; Weise, Katrin; Meyer, Rüdiger; Brendel, Rolf

doi:10.1016/j.solmat.2010.12.004

Cited by 16 publications

(4 citation statements)

References 16 publications

(15 reference statements)

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“…In the following, we focus on the impact of the four edges of the cell—the two busbars and the two “non‐busbar”‐edges—on the main cell parameters. Simulations and different measurements have shown that the busbar regions lead to a strong reduction of the efficiency of the BJBC solar cell, due to the reduction of the short‐circuit current density and the fill factor caused by increased recombination and series resistance in these regions.…”

Section: Solar Cells Resultsmentioning

confidence: 99%

From high‐efficiency n‐type solar cells to modules exceeding 20% efficiency with aluminum‐based cell interconnection

Merkle

Schulte‐Huxel

Blankemeyer

et al. 2012

Progress in Photovoltaics

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We present the integrated development of back-contacted solar cells and an adequate module interconnection for a highefficiency photovoltaic module. We report on a large area (125 Â 125) mm 2 back-junction back-contact n-type solar cell metallized with aluminum having a total area conversion efficiency of 20.7%. To transfer the high conversion efficiency to the module, we use the laser welding process named aluminum-based mechanical and electrical laser interconnection for module integration of these back-contacted solar cells. We further analyze the impact of the busbars of our back-junction back-contact cells on the cell performance and report on optimization of the cell/module interface. The new cells have an adapted rear-side geometry by omitting the emitter busbar. A proof-of-concept module consisting of these cells is presented.

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Section: Solar Cells Resultsmentioning

confidence: 99%

From high‐efficiency n‐type solar cells to modules exceeding 20% efficiency with aluminum‐based cell interconnection

Merkle

Schulte‐Huxel

Blankemeyer

et al. 2012

Progress in Photovoltaics

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“…Hence, the highest reported efficiency of silicon solar cells was achieved with a back-contact structure . Various back-contact configurations have been proposed for silicon solar cells. − Among them, the interdigitated back-contact (IBC) cell , is the most optimized back-contact configuration designed with an emitter, back surface field, and respective contacts formed as an interdigitated finger pattern. Swanson et al improved the IBC cell by introducing an improved version of point-contact, in which the backside diffusion is arranged in the form of points .…”

Section: Introductionmentioning

confidence: 99%

First Demonstration of Top Contact-Free Perovskite/Silicon Two-Terminal Tandem Solar Cells for Overcoming the Current Density Hurdle

Pyun

Lee

Kim

et al. 2023

ACS Appl. Energy Mater.

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Current density plays a substantial role in monolithic tandem solar cells; however, it is difficult to control because subcells and auxiliary layers are stacked and serially connected vertically to obtain higher voltages. The vertically stacked structure intrinsically triggers inevitable parasitic absorption. In current typical perovskite/silicon two-terminal (2-T) tandem solar cells, 5−10 layers are placed on the light path, even though they are not current generating layers. These layers usually include transparent window layers, buffer layers, carrier extraction layers, and recombination layers. Therefore, the development of top contact-free architectures to reduce parasitic absorption in 2-T tandem solar cells is required for achieving high efficiency. In this study, a top contact-free perovskite/silicon 2-T tandem solar cell with quasi-interdigitated intermediate electrodes (Q-IDIEs) is reported for the first time. Several layers placed above the perovskite layer in conventional devices are relocated to the backside of the perovskite. The Q-IDIE, composed of a patterned Ni/NiO X shell above the full-deposited TiO 2 , was fabricated by the following processes: photolithography, lift-off, and oxidation. The device results in 4.23% efficiency with an open-circuit voltage of 1.54 V. This tandem architecture is expected to be a breakthrough for overcoming the theoretical efficiency limit of single-junction solar cells with further optimization.

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“…The common concept for the structure of MWT and EWT is the wrap through, from the front side to the rear side of the solar cell, as shown in figure 2 [14,15]. The main purpose of the wrap through is to collect much more current from the front side of the cell to the back side, without the need for many holes in the silicon wafer.…”

Section: Introduction Of Pv Materials and The Back-contact Solar Cellsmentioning

confidence: 99%

Back-contact perovskite solar cells

Lin¹,

Lin²,

Li³

et al. 2021

Semicond. Sci. Technol.

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Organic-inorganic hybrid perovskites have emerged as a promising light absorber for solar cells due to their remarkable optoelectronic properties. High-efficiency perovskite solar cells mainly employ a sandwich architecture in which the perovskite active layer is sandwiched between two selective contact layers. However, there is an inevitable optical loss in the sandwiched structure when the light propagates through the transparent conductive substrate and selective contact layer. In order to prevent the transmission loss, novel designs of back-contact structures are demonstrated for light illumination upon the perovskite. To achieve the back-contact structure, the selective contact layers and electrode are deposited and patterned on the substrate. The perovskite light absorber is finally deposited on top of the patterned electrode to complete the back-contact device. The photogenerated carriers (holes and electrons) are transported in the same direction and extracted by the selective contact layers. In this paper, we summarize recent advances in back-contact perovskite solar cells.

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Progress in emitter wrap-through solar cell fabrication on boron doped Czochralski-grown silicon

Cited by 16 publications

References 16 publications

From high‐efficiency n‐type solar cells to modules exceeding 20% efficiency with aluminum‐based cell interconnection

From high‐efficiency n‐type solar cells to modules exceeding 20% efficiency with aluminum‐based cell interconnection

First Demonstration of Top Contact-Free Perovskite/Silicon Two-Terminal Tandem Solar Cells for Overcoming the Current Density Hurdle

Back-contact perovskite solar cells

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