Stretchable micro-scale concentrator photovoltaic module with 15.4% efficiency for three-dimensional curved surfaces

Sato, Daisuke; Masuda, Taizo; Araki, Kiyomichi; Yamaguchi, Masafumi; Okumura, Ko; Sato, Akinori; Tomizawa, Ryota; Yamada, Noboru

doi:10.1038/s43246-020-00106-x

Cited by 15 publications

(6 citation statements)

References 48 publications

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“…The torn gr-PSA film after the tensile test shows that a crack occurred at the interface of the graphite patterns and the s-PSA matrix (figure 7(b)). This indicates that the crack initiated at the vertices where stress was concentrated [23] and propagated along the edge of the patterns.…”

Section: Resultsmentioning

confidence: 97%

Fabrication and peeling behavior of thermally conductive pressure-sensitive adhesive films with embedded graphite composite patterns

Oh,

Baek,

Yun

et al. 2023

Funct. Compos. Struct.

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Thermal interface materials (TIMs) have been widely employed to address the thermal issues arising in electronics. Given that heat generated at heat sources is dissipated into heat sinks through TIMs, the softer they are, the more efficient the heat transfer is. In this paper, a thermally conductive pressure-sensitive adhesive film (gr-PSA film) in which graphite composites patterns were embedded was fabricated and its thermal conductivity and peeling behavior were investigated. Because of its low storage modulus (2.4 × 104 Pa), a mixture of soft polyurethane acrylate, butyl acrylate, and 2-ethylhexyl acrylate was used to fabricate a pressure-sensitive adhesive. The in-plane and through-plane thermal conductivity of the gr-PSA film were measured as 1.56 (± 0.37) Wm−1K−1 and 0.25 (± 0.03) Wm−1K−1, respectively. The peeling behavior of the gr-PSA tape was investigated by a 90º peel test and the results were compared with simulation results obtained by cohesive zone modeling implemented in the finite element method. Both results show that the peel force oscillated when the gr-PSA tape was peeled. Because the gr-PSA tape comprises alternating stiff and compliant segments, more force is needed peeling when bending the stiff segments.

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Section: Resultsmentioning

confidence: 97%

Fabrication and peeling behavior of thermally conductive pressure-sensitive adhesive films with embedded graphite composite patterns

Oh,

Baek,

Yun

et al. 2023

Funct. Compos. Struct.

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“…Lightweight and flexible PVs are mostly vital for integration scheme with weight restrictions and curved surfaces such as in vehicles, greenhouses, wearable electronics and aerospace applications. [19,29,[196][197][198][199][200][201][202] While, stretchable SCs are relevant for wearable textile and portable devices. [41,[203][204][205] Furthermore, the size of PV devices can be adapted from upscaled integrated systems to miniature micro-cells.…”

Section: Further Tuning Capabilities Beyond Spectrum-sensitive Aspectsmentioning

confidence: 99%

Tunable Photovoltaics: Adapting Solar Cell Technologies to Versatile Applications

Meddeb

Götz‐Köhler

Neugebohrn

et al. 2022

Advanced Energy Materials

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solar, wind, hydro, geothermal, and biomass, to enable a steady mitigation of greenhouse gas emissions, which are causing the planetary climate change and global warming. [5][6][7] Additionally, due to the economic development and the worldwide urbanization, a continuous rise of the global energy consumption across all key sectors, that is, power, heating, industry, and transport is occurring. This is expressed by an increase in the annual global electricity demand by 4.5% in 2021 corresponding to additional 1000 TWh. [4] Hence, strict criteria for the selection of competitive and abundant energy alternatives are imposed, requiring high yield at affordable prices. [8] The share of total renewables power generation excluding hydropower exceeded 3000 TWh in 2020, corresponding to almost 12% of the global electricity generation. [3] Considering an effective synergy between various sustainable energy candidates, solar photovoltaics (PV) have demonstrated great capabilities that can satisfy the requirements in the pathway towards 100% renewable electricity. [9][10][11][12] Owing to the research and development activities over the last decades, the power conversion efficiencies of solar cells (SC) have skyrocketed with a prolonged operation lifetime (>15 years) and a drastic plummeting in manufacturing costs (global average module selling price below $0.25 per W). [6,[13][14][15] The rapid universal deployment of PV resulted in a contribution of about 3.4% in the worldwide electricity generation in 2020. [3] Presently, the global installed PV capacity is approaching 1 TW and it is envisioned to reach ≈10 TW by 2030 and 30 to 70 TW by 2050. [16] Interestingly, along with massive electricity production using conventional solar power plants and rooftop solar panels, ancillary concepts of PV offer new strategies for supplying modern systems in versatile applications. [17][18][19] Moreover, diverse functionalities beyond solar energy harvesting can be afforded by adaptive PV, including aesthetic appearance, visual comfort and thermal management. [17,18,20,21] The distributed nature and the ubiquitous accessibility of multifunctional PV products are substantial features of solar PV in contrast to other renewable energies. However, traditional SCs dominating the market impose intrinsic optoelectronic and thermomechanical limitations, that prohibit their multifunctional utilization. To overcome these drawbacks, novel functional materials and innovative device architecture Solar photovoltaics (PV) offer viable and sustainable solutions to satisfy the growing energy demand and to meet the pressing climate targets. The deployment of conventional PV technologies is one of the major contributors of the ongoing energy transition in electricity power sector. However, the diversity of PV paradigms can open different opportunities for supplying modern systems in a wide range of terrestrial, marine, and aerospace applications. Such ubiquitous and versatile applications necessitate the development of PV technologies with customized desig...

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“…Therefore, covering curved surfaces causes problems such as mechanical stress and mismatching losses [58][59][60]. Several innovative PVs suitable for enclosing curved surfaces have been developed recently [61,62]. VIPVs were evaluated recently, including the curved surface and impact from temperature [63,64].…”

Section: Introductionmentioning

confidence: 99%

Vector-Based Advanced Computation for Photovoltaic Devices and Arrays: Numerical Reproduction of Unusual Behaviors of Curved Photovoltaic Devices

Araki,

Ota,

Nishioka

2024

Applied Sciences

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Most equations and models for photovoltaics are based on the assumption that photovoltaic (PV) devices are flat. Therefore, the actual performance of nonplanar PV devices should be investigated and developed. In this study, two algorithms were developed and defined using vector computations to describe a curved surface based on differential geometry and the interaction with non-uniform solar irradiance (i.e., non-uniform shading distribution in the sky). To validate the computational model, the power output from a commercial curved solar panel for the Toyota Prius 40 series was monitored at four orientation angles and in various climates. Then, these were compared with the calculation results obtained using the developed algorithm. The conventional calculation used for flat PV devices showed an overestimated performance due to ignorance of inherent errors due to curved surfaces. However, the new algorithms matched the measured trends, particularly on clear-sky days. The validated computation method for curved PV devices is advantageous for vehicle-integrated photovoltaic devices and PVs including building-integrated photovoltaics (BIPVs), drones, and agriphotovoltaics.

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Stretchable micro-scale concentrator photovoltaic module with 15.4% efficiency for three-dimensional curved surfaces

Cited by 15 publications

References 48 publications

Fabrication and peeling behavior of thermally conductive pressure-sensitive adhesive films with embedded graphite composite patterns

Fabrication and peeling behavior of thermally conductive pressure-sensitive adhesive films with embedded graphite composite patterns

Tunable Photovoltaics: Adapting Solar Cell Technologies to Versatile Applications

Vector-Based Advanced Computation for Photovoltaic Devices and Arrays: Numerical Reproduction of Unusual Behaviors of Curved Photovoltaic Devices

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