Commercial carbon nanotube as rear contacts for industrial p-type silicon solar cells with an efficiency exceeding 23%

Gao, Qing; Yan, Jun; Li, Han; Chen, Jingwei; Yang, Xueliang; Bai, Yuhua; Zhang, Xuning; Chen, Bingbing; Guo, Jianxin; Duan, Weiyuan; Han, Kaixin; Li, Feng; Wang, Jianming; Song, Dengyuan; Wang, Shufang; Flavel, Benjamin S.; Chen, Jianhui

doi:10.1016/j.carbon.2022.11.020

Cited by 7 publications

(8 citation statements)

References 24 publications

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“…Furthermore, a PCE of 20.1% with an industrial size (245.71 cm 2 ) was also achieved and this represented a breakthrough for CNT/Si solar cells in terms of area and efficiency. [56,[107][108][109] In addition, a commercially available CNT soot was mixed with Nafion and used to replace the traditional Hebei University [ 114] CNT/Si 18.9 3 631 38.8 77.2 2019 Karlsruhe Institute of Technology [ 106] 21.4 4.8 654 39.9 82 2020 Hebei University and Karlsruhe Institute of Technology [ 105] 20.1 245.71 646 39.5 78.9 2020 Hebei University and Karlsruhe Institute of Technology [ 105] 22.04 4.4 683.4 40.38 79.9 2021 Hebei University and Karlsruhe Institute of Technology [ 115] 22.04 669.4 40.3 81.7 2022 Hebei University and Karlsruhe Institute of Technology [ 116] 23.03 6.2 679.4 41.3 82.1 2022 Hebei University and Karlsruhe Institute of Technology [ 117] back structure of PERC solar cells. [110][111][112][113] A record efficiency of 23.03% was achieved for the CNT/p-Si solar cell.…”

Section: Conductive Passivating Contact Assisted Cnt/si Solar Cells I...mentioning

confidence: 99%

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The Development of Carbon/Silicon Heterojunction Solar Cells through Interface Passivation

Chen,

Zhang,

Gao

et al. 2024

Advanced Science

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Passivating contactsin heterojunction (HJ) solar cells have shown great potential in reducing recombination losses, and thereby achieving high power conversion efficiencies in photovoltaic devices. In this direction, carbon nanomaterials have emerged as a promising option for carbon/silicon (C/Si) HJsolar cells due to their tunable band structure, wide spectral absorption, high carrier mobility, and properties such as multiple exciton generation. However, the current limitations in efficiency and active area have hindered the industrialization of these devices. In this review, they examine the progress made in overcoming these constraints and discuss the prospect of achieving high power conversion efficiency (PCE) C/Si HJ devices. A C/Si HJ solar cell is also designed by introducing an innovative interface passivation strategy to further boost the PCE and accelerate the large area preparationof C/Si devices. The physical principle, device design scheme, and performanceoptimization approaches of this passivated C/Si HJ cells are discussed. Additionally, they outline potential future pathways and directions for C/Si HJ devices, including a reduction in their cost to manufacture and their incorporation intotandem solar cells. As such, this review aims to facilitate a deeperunderstanding of C/Si HJ solar cells and provide guidance for their further development.

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Section: Conductive Passivating Contact Assisted Cnt/si Solar Cells I...mentioning

confidence: 99%

Section: Perspectivesmentioning

confidence: 99%

The Development of Carbon/Silicon Heterojunction Solar Cells through Interface Passivation

Chen,

Zhang,

Gao

et al. 2024

Advanced Science

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“…The CNTs are commercially available under the names SG65i, which are cost‐effective and have been proved to be able to achieve industrial CNT–silicon solar cells with an efficiency exceeding 23%. [ 52 ]…”

Section: Introductionmentioning

confidence: 99%

“…In our recent work, a passivation scheme involving organic thin films and a CNT ink was developed and this increased the efficiency up to >23% and was used to realize industrial size (245.71 cm 2 ) device. [50][51][52] However, despite the efficient and scalable breakthrough, the geometry used was still not state of art. The currently state of art device geometry in photovoltaics is IBC cell structure, where the emitter and contact are on the back of the wafer.…”

mentioning

confidence: 99%

“…Figure 1e commercially available under the names SG65i, which are costeffective and have been proved to be able to achieve industrial CNT-silicon solar cells with an efficiency exceeding 23%. [52] The absorption spectroscopy of the materials is seen in Figure S4, Supporting Information. It is found that ultrasonication of the CNT:Nafion leads to a lower conductivity than its pristine state (Figure 2a) due to the reduction of the length of the nanotubes or their bundles and the reduced possibility of kinking (Figure 2b).…”

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confidence: 99%

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Interdigitated Back‐Contacted Carbon Nanotube–Silicon Solar Cells

et al. 2023

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Carbon/silicon heterojunctions provide a new perspective for silicon solar cells and in particular those made from carbon nanotubes (CNTs) have already achieved industrial‐level power conversion efficiency and device size when using organic passivation and a back‐junction design. However, the current state of the art device geometry for silicon photovoltaics is the interdigitated back contact (IBC) cell and this has yet to be demonstrated for CNT/Si solar cells due to the complexity of fabricating the required patterns. Herein, IBC‐CNT solar cells are demonstrated via the simple spin coating of a conductive hole‐selective passivating film and the evaporation of buried silicon oxide/magnesium electron‐selective contacts for both polarities. The CNT coverage area fraction (fCNT) and the gap between the two polarities are optimized to minimize electrical shading loss and ensure high photocarrier collection. Large‐area (4.76 cm2) highly efficient (17.53%) IBC‐CNT solar cells with a Voc of 651 mV and Jsc of 40.56 mA cm−2 are demonstrated and are prepared with one alignment step for the CNT/Si contact, and photolithographic‐free and room‐temperature processes. These performance parameters are among the best for solution‐processed dopant‐free IBC schemes and indicate the feasibility of using low‐dimensional carbon materials in IBC solar cells.

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Industrial Scale Production, Commercialization, and Global Market of Functionalized Carbon Nanostructures

Punetha,

Bhagat,

Pathak

et al. 2024

Handbook of Functionalized Carbon Nanostructures

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Commercial carbon nanotube as rear contacts for industrial p-type silicon solar cells with an efficiency exceeding 23%

Cited by 7 publications

References 24 publications

The Development of Carbon/Silicon Heterojunction Solar Cells through Interface Passivation

The Development of Carbon/Silicon Heterojunction Solar Cells through Interface Passivation

Interdigitated Back‐Contacted Carbon Nanotube–Silicon Solar Cells

Industrial Scale Production, Commercialization, and Global Market of Functionalized Carbon Nanostructures

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