Influence of laser condition on the electrical and mechanical performance of bifacial half‐cutting PERC solar cell and module

Zhang, Caixia; Shen, Honglie; Liu, Hongzhi; Zhang, Wei; Li, Hua

doi:10.1002/er.8229

Cited by 10 publications

(5 citation statements)

References 24 publications

(39 reference statements)

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“…It is characterized by a compact footprint (as shown in Figure 7A) and a very high degree of freedom in terms of wafer format (M2 to M12) and cutting layouts thanks to the use of a flexible chuck design and the possibility to add up to five process stations (see Figure 7B). This tool retains all the major benefits of TLS technology including high yield, reduced generation of microcracks, and hot spots, 51 and smooth cut edges which are key for subsequent edge re‐passivation. It can be inserted inline (with additional automation) or operated as standalone using high‐throughput automatic loading/unloading equipment also developed by 3D‐Micromac in HighLite (see Figure 7C).…”

Section: Resultsmentioning

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

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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%

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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“…From a reliability perspective, the smaller cells resulting from cutting are less susceptible to cracking than larger cells [38]. However, the cutting process introduces the potential for cell cracking due to defects along the cut edges [51], [52], [53].…”

Section: Cell Cuttingmentioning

confidence: 99%

“…Bosco et al [53] demonstrated that an optimized cutting process can essentially eliminate cracked cells due to static and dynamic mechanical loading, compared with nonoptimized processes that result in significant cell cracking. Researchers have also demonstrated that cutting cells via thermal laser separation produces less damage than cutting them via laser scribing and cleavage [51], [52]. [17], [18], [19], [20], [21], [22].…”

Section: Cell Cuttingmentioning

confidence: 99%

Getting Ahead of the Curve: Assessment of New Photovoltaic Module Reliability Risks Associated With Projected Technological Changes

Zuboy,

Springer,

Palmiotti

et al. 2024

IEEE J. Photovoltaics

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Maintaining the reliability of photovoltaic (PV) modules in the face of rapidly changing technology is critical to maximizing solar energy's contribution to global decarbonization. Our review describes expected changes in PV technology and their impacts on performance and reliability. We leverage PV market reports, interviews with PV researchers and other industry stakeholders, and peer-reviewed literature to narrow the multitude of possible changes into a manageable set of 11 impactful trends likely to be incorporated in near-term crystalline-silicon module designs. We group the trends into four categories (module architecture, interconnect technologies, bifacial modules, and cell technology) and explore the drivers behind the changes, their interactions, and associated reliability risks and benefits. Our analysis identifies specific areas that would benefit from accelerating the PV reliability learning cycle to assess emerging module products and designs more accurately. We recommend that researchers continue tracking module technologies and their reliability implications, so efforts can be focused on the most impactful trends. As the rapid technological turnover continues, it is also critical to incorporate fundamental knowledge into models that can predict module reliability. Predictive capabilities complete the PV reliability learning cycle-reducing the time required to assess new designs and mitigating the risks associated with large-scale deployment of new products.

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“…[23,24] In addition, the industry trend of using ever-larger wafer sizes, such as M10 and G12 formats (length of 182 and 210 mm, respectively), implies the necessity of cutting them into smaller cells before module integration. [25] During this process, the stress induced by the cleavage could generate defects and lead to delamination. The rationale for encapsulating metallized samples was that previously for c-Si cells, contraction of encapsulant around the busbars has been shown to result in a local high tensile stress being applied to the cells.…”

Section: Delamination In Encapsulated Samplesmentioning

confidence: 99%

Mitigating Delamination in Perovskite/Silicon Tandem Solar Modules

Bristow,

Li,

Babics

et al. 2024

Solar RRL

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As perovskite/silicon tandem solar cells head toward industrialization, one emerging challenge relates to the mechanical reliability of these organic–inorganic multilayer devices. Herein, the fracture toughness and interfacial strength of monolithic p–i–n perovskite/silicon tandems are assessed in the context of module integration. While the weakest layer in the tandem stack investigated is found to be C60, used here as electron‐transport layer (interfacial tensile strength of 0.64 MPa), more concerningly, the fracture energy of the C60/tin‐oxide interface is found to be only 1.2 J m−2. The low fracture toughness of perovskite/silicon tandems can encourage crack propagation and large‐scale delamination during processes used for their integration into modules such as cell cutting, interconnection, and vacuum lamination. By improving the tin oxide buffer layer properties and reducing sputtering‐induced internal stress (associated with the transparent top electrode deposition onto the tin the oxide buffer layer), the fracture energy is improved to over 160 J m−2. A second strategy to mitigate delamination due to the low fracture toughness of the cells is tailoring encapsulation and cell processing techniques specifically toward the perovskite/silicon tandem technology. In this work, a critical reliability issue, relevant for any perovskite‐based optoelectronic technology requiring device packaging, is addressed.

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Influence of laser condition on the electrical and mechanical performance of bifacial half‐cutting PERC solar cell and module

Cited by 10 publications

References 24 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

Getting Ahead of the Curve: Assessment of New Photovoltaic Module Reliability Risks Associated With Projected Technological Changes

Mitigating Delamination in Perovskite/Silicon Tandem Solar Modules

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