Article
Energy & Fuels
Bruno Vicari Stefani, Moonyong Kim, Matthew Wright, Anastasia Soeriyadi, Dmitriy Andronikov, Ilya Nyapshaev, Sergey Abolmasov, Konstantin Emtsev, Alexey Abramov, Brett Hallam
Summary: This study compares silicon heterojunction (SHJ) solar cells made with different types of silicon wafers. It found that boron-doped SHJ cells are highly sensitive to BO-LID, while gallium-doped SHJ cells are stable and show improved efficiency. However, further research is needed to increase the fill factor and improve the efficiency of gallium-doped SHJ solar cells.
Article
Energy & Fuels
Dehang Lin, Zechen Hu, Qiyuan He, Deren Yang, Lihui Song, Xuegong Yu
Summary: This study investigated light-induced degradation experiments on p-type boron-doped Czochralski silicon wafers under different conditions, and found that peak firing temperature strongly influenced the regeneration rate of boron-oxygen related LID and the degradation kinetics of LeTID. Additionally, extending the duration of dark annealing pre-treatment was observed to decelerate the subsequent regeneration of BO defects, indicating a notable decrease in mobile hydrogen concentration during dark annealing. Based on this phenomenon, a hydrogen-related model based on reversible reaction was proposed to describe the behavior of LeTID in crystalline silicon.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Nanoscience & Nanotechnology
Saman Jafari, Yan Zhu, Fiacre Rougieux, Joyce Ann T. De Guzman, Vladimir P. Markevich, Anthony R. Peaker, Ziv Hameiri
Summary: Using the photoconductance decay measurement method, this study identified the precursor of the defect responsible for light-induced degradation in boron-doped Czochralski-grown silicon wafers. The presence of a minority carrier trap in the annealed state, which disappeared after degradation, was observed. The study also concluded that the detected trap has two or more energy levels, indicating that a single-level trap model cannot explain the doping-dependent measurements.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Review
Physics, Applied
Lihui Song, Zechen Hu, Dehang Lin, Deren Yang, Xuegong Yu
Summary: This paper introduces the application of hydrogenation engineering in crystalline silicon solar cells. By deactivating and inducing defects, hydrogenation can significantly improve the efficiency of passivated emitter rear contact, TOPCon, and SHJ solar cells.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Jianbo Shao, Xi Xi, Guilin Liu, Feng Luo
Summary: This paper reviews the role of hydrogen in crystalline silicon solar cells and discusses its effects on the performance and stability of the cells.
JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS
(2023)
Article
Energy & Fuels
Xin Ren Ng, Donny Lai, Puqun Wang, Armin G. Aberle, Rolf Stangl, Fen Lin
Summary: Thermally stable polysilicon-based tunnel junctions have been developed for passivating silicon wafers, selectively extracting holes, and being compatible with high-temperature firing process. These tunnel junctions show improved thermal stability and efficiency potential for both passivated-contact Si bottom cells and single-junction Si solar cells, enhancing cell efficiency in solar cell fabrication processes.
PROGRESS IN PHOTOVOLTAICS
(2022)
Article
Energy & Fuels
Daniel Chen, Moonyong Kim, Jianwei Shi, Bruno Vicari Stefani, Zhengshan (Jason) Yu, Shaoyang Liu, Roland Einhaus, Stuart Wenham, Zachary Holman, Brett Hallam
Summary: This study integrates defect engineering methods of gettering and hydrogenation into silicon heterojunction solar cells, demonstrating the potential of making high-efficiency solar cells using low-lifetime p-type silicon wafers.
PROGRESS IN PHOTOVOLTAICS
(2021)
Article
Energy & Fuels
Siqi Ding, Chen Yang, Cheng Qin, Bin Ai, Xiaopu Sun, Jianghai Yang, Quan Liu, Xueqin Liang
Summary: In this study, the effect of device structures and silicon wafer positions on light-induced degradation (LID) and regeneration was investigated. Five groups of industrial PERC and Al-BSF solar cells were fabricated using silicon wafers from different positions of a B-doped Czochralski silicon (Cz-Si) ingot. The results showed that the electrical injection regeneration can effectively reduce the efficiency losses during LID for both PERC and Al-BSF cells. The cells made from the middle of the ingot exhibited the best performance throughout the experiment.
Article
Chemistry, Multidisciplinary
Kyo Yamagata, Kento Ueta, Akito Nakai, Atsuhiro Osuka, Takayuki Tanaka
Summary: A recent study has reported that a mu-oxo-bridged dimer of Si(iv) corrole exhibits dual emissive properties depending on the solvent viscosity. In this study, the control of excited-state dynamics and dual emission was examined by introducing meso-aryl substituents. Different structures and emission behaviors were observed in the solid state and excited state, suggesting the importance of molecular structure on the dual emissive properties.
MATERIALS CHEMISTRY FRONTIERS
(2022)
Article
Physics, Applied
Moonyong Kim, Matthew Wright, Daniel Chen, Catherine Chan, Alison Ciesla, Malcolm Abbott, Brett Hallam
Summary: This study proposes a new formulation for a relative defect concentration, beta, which allows for lifetime analysis at arbitrary injection levels and enables meaningful comparison of degradation extent between different samples. It also provides a more accurate estimate of defect concentration and allows for extraction at the cross-over point and reduction of the impact of surface passivation modulation.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Lizhi Gai, Ruijing Zhang, Xiuguang Shi, Zhigang Ni, Sisi Wang, Jun-Long Zhang, Hua Lu, Zijian Guo
Summary: A boron-containing chromophore called BOINPY was developed using the concept of photoinduced nonadiabatic decay. BOINPY exhibited specific features that addressed concerns related to the design of photothermal agents, and showed efficient photothermal conversion for the treatment of solid tumors. This study provides theoretical guidance and practical chromophores for the development of high-performance photothermal therapy agents.
Review
Energy & Fuels
Olatz Arriaga Arruti, Alessandro Virtuani, Christophe Ballif
Summary: The SHJ technology has reached a level of maturity suitable for large-scale manufacturing, but its reliability and long-term performance still need to be proven to gain confidence from industry stakeholders. This study collects and examines performance data of SHJ modules from published literature, establishing median and average performance loss rates (PLRs) of 0.56%/year and 0.70%/year. By applying a filtering procedure, higher PLR values of 0.80%/year and 0.83%/year are obtained for median and average values, respectively. The study also identifies correlations between PLRs and climatic conditions, with a wide variability observed. The findings highlight the potential and challenges of the SHJ technology.
PROGRESS IN PHOTOVOLTAICS
(2023)
Article
Engineering, Electrical & Electronic
M. Sangeetha, T. S. Senthil, N. Senthilkumar, Misook Kang
Summary: A simple precipitation process was used to synthesize Bismuth and Boron co-doped TiO2 nanorods. The materials exhibited a highly crystalline anatase structure with varying particle sizes. Optical studies showed different band gap energies for the synthesized nanomaterials. The photocatalytic activity of Bi-B co-doped materials was found to be enhanced compared to pure TiO2 and singly-doped materials.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Physical
Shiwei Gao, Zheng Wang, Haoran Wang, Yannan Jia, Nannan Xu, Xue Wang, Jiahao Wang, Chenyue Zhang, Tian Tian, Wei Shen
Summary: In this study, B-doped biochar (BBC) materials with different B contents were prepared and used for the adsorption/degradation of oxytetracycline (OTC) through the activation of peroxydisulfate (PDS). The catalytic activity of BBC was improved to different degrees compared with that of pristine BC owing to enhanced OTC adsorption and PDS activation. Using free-radical-quenching experiments, two main pathways for OTC degradation were identified.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Zhuopeng Wu, Weiyuan Duan, Andreas Lambertz, Depeng Qiu, Manuel Pomaska, Zhirong Yao, Uwe Rau, Liping Zhang, Zhengxin Liu, Kaining Ding
Summary: This study demonstrates the implementation of trimethyl boron doped p-type a-Si:H film as a hole transport layer contacting with indium-free aluminum doped zinc oxide in silicon heterojunction solar cells. The research shows that moderate doping concentration can help achieve low defect density and high doping level in the film, resulting in improved cell performance with low contact resistivity.
APPLIED SURFACE SCIENCE
(2021)