Tailoring protective metals for high-efficient and stable dopant-free crystalline silicon solar cells

Liu, Zhaolang; Lin, Hao; Wu, Taojian; Wang, Zhong Lin; Pang, Yicong; Wang, Genshun; Cui, Zhiyang; Qiao, Shan; Yu, Tianbao; Gao, Pingqi; Peng, Shanglong

doi:10.1016/j.solmat.2023.112343

Cited by 5 publications

(2 citation statements)

References 39 publications

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“…1–4 Owing to their extraordinary advantages of high chemical stability, excellent photostability, narrow-band peak emission, no background, and deep tissue penetration, 5–7 UCNPs have found important applications in solar cells and high-performance biolabeling. 8–10 However, the increase in the efficiency of UCNPs remains a challenge, which is fundamentally limited by the forbidden nature of f–f in lanthanide elemental ions and non-radiative processes mediated by the bulk and surface defects. 11,12 In recent years, the surface plasmon-enhanced upconversion strategy has attracted considerable attention as it produces extraordinary performance with a high enhancement factor and flexible tunability.…”

Section: Introductionmentioning

confidence: 99%

Efficient monodisperse upconversion composite prepared using high-density local field and its dual-mode temperature sensing

Li,

Zhao,

Liu

et al. 2024

Phys. Chem. Chem. Phys.

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Section: Introductionmentioning

confidence: 99%

Efficient monodisperse upconversion composite prepared using high-density local field and its dual-mode temperature sensing

Li,

Zhao,

Liu

et al. 2024

Phys. Chem. Chem. Phys.

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“…[4][5][6] These materials induce band bending at the c-Si surface based on the band alignment and interfacial defect density, facilitating the accumulation of one type of carrier and the formation of a carrier-selective HJ. Various hole transport materials have been used in solar cells, including MoO x , [2,3,7,8] VO x , [9][10][11] and WO x , [12][13][14] due to their high WFs. The use of MoO x as hole-selective contacts has resulted in a remarkable power conversion efficiency (PCE) of 23.83% in dopantfree solar cells, [15] demonstrating the tremendous potential of dopant-free HJ solar cells for applications.…”

Section: Introductionmentioning

confidence: 99%

Study on the Thermal Stability of Molybdenum Oxide‐Passivated Silicon Solar Cells

Cui,

Pang,

Tang

et al. 2024

Solar RRL

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Dopant‐free heterojunction (HJ) solar cells are known for their simple process conditions and low parasitic absorption. However, stability issues remain one of the major obstacles for further development of cells with transition metal oxides (TMOs). Therefore, this research demonstrates the mechanism of thermal annealing degradation effects on TMOs/silicon (Si) HJ, namely, the infiltration of oxygen from air and the bidirectional diffusion of oxygen from TMOs, by investigating a typical molybdenum oxide (MoOx)/Si contact. A dense Au interlayer is introduced to block the interdiffusion of oxygen from the MoOx/Si interface and its surrounding environment. As a result, the dense layer slows down the interfacial oxidation of MoOx/Si and the degradation of the MoOx work function, thus improving the stability of the MoOx/Si HJ to 200 °C. The diffusion of oxygen from MoOx to the MoOx/Si interface will be critical to further promote the thermal stability of the devices thereafter, especially for the cells with i‐a‐Si:H layer as the passivation layer. To attain stable dopant‐free cells with MoOx, it is crucial to prevent oxygen diffusion into Si while maintaining a high MoOx work function and a thin SiOx layer at the interface.

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Self‐Diffusion Effect Assisted TiO₂/Li₃PO₄ Electron Selective Passivating Contact in Silicon Solar Cells Approaching 23% Efficiency

Xu,

Yan,

et al. 2024

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Carrier selective contacts with passivation effects are considered to have a significant influence on the performance of crystalline silicon (c‐Si) solar cells. It is essential for electron selective contact materials to meet the requirements of ultra‐low contact resistance and excellent passivation effects. This work introduces a stack layer of Lithium Phosphate (Li3PO4) /Titanium Dioxide (TiO2) as a new electron selective passivating contact. It is found that the stack achieves an impressive contact resistivity (ρc) of 0.128 mΩ cm2 on n‐type c‐Si substrates with resistivity ranging from 1 to 3 Ω cm (14.6 mΩ cm2 for the n‐Si/a‐Si:H/Li3PO4/TiO2/Al contact). Furthermore, it effectively reduces the surface recombination parameter (J0) to less than 4 fA by incorporating a 6 nm a‐Si:H(i) layer. The characterization of the n‐Si/Li3PO4/TiO2 interface reveals that phosphorus diffusion into silicon plays a crucial role in achieving the ultra‐low contact resistivity, while the presence of PO43− groups helps in fixing hydrogen atoms to maintain the desired chemical passivation effect. Finally, a silicon heterojunction solar cell (SHJ) with a rear full‐area configuration of a‐Si:H/Li3PO4/TiO2/Al is successfully demonstrated achieving an impressive power conversion efficiency of 22.89%. The result proves the efficacy of employing hydrogen‐rich low‐work function metal oxide stacks as electron selective passivating contacts.

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Tailoring protective metals for high-efficient and stable dopant-free crystalline silicon solar cells

Cited by 5 publications

References 39 publications

Efficient monodisperse upconversion composite prepared using high-density local field and its dual-mode temperature sensing

Efficient monodisperse upconversion composite prepared using high-density local field and its dual-mode temperature sensing

Study on the Thermal Stability of Molybdenum Oxide‐Passivated Silicon Solar Cells

Self‐Diffusion Effect Assisted TiO₂/Li₃PO₄ Electron Selective Passivating Contact in Silicon Solar Cells Approaching 23% Efficiency

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Tailoring protective metals for high-efficient and stable dopant-free crystalline silicon solar cells

Cited by 5 publications

References 39 publications

Efficient monodisperse upconversion composite prepared using high-density local field and its dual-mode temperature sensing

Efficient monodisperse upconversion composite prepared using high-density local field and its dual-mode temperature sensing

Study on the Thermal Stability of Molybdenum Oxide‐Passivated Silicon Solar Cells

Self‐Diffusion Effect Assisted TiO2/Li3PO4 Electron Selective Passivating Contact in Silicon Solar Cells Approaching 23% Efficiency

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Self‐Diffusion Effect Assisted TiO₂/Li₃PO₄ Electron Selective Passivating Contact in Silicon Solar Cells Approaching 23% Efficiency