 Silicon heterojunction back-contact solar cells by laser patterningHua Wu,
Feng Ye,
Miao Yang,
Fei Luo,
Xiyan Tang,
Qing Tang,
Haoran Qiu,
Zhipeng Huang,
Genshun Wang,
Zhaoqing Sun,
Hao Lin,
Junzhe Wei,
Yunpeng Li,
Xiaoqiang Tian,
Jinsheng Zhang,
Lei Xie,
Xiaoyu Deng,
Tuan Yuan,
Mingzhe Yu,
Yong Liu,
Ping Li,
Hao Chen,
Shenghou Zhou,
Qishu Xu,
Peng Li,
Jun Duan,
Jiansheng Chen,
Chunxiu Li,
Shi Yin,
Bo Liu,
Chang Sun,
Qiao Su,
Yichun Wang,
Hao Deng,
Tian Xie,
Pingqi Gao,
Qian Kang,
Yongzhe Zhang,
Hui Yan,
Ningyi Yuan,
Fuguo Peng,
Yunlai Yuan,
Xiaoning Ru,
Bo He,
Lan Chen,
Jianbo Wang,
Junxiong Lu,
Minghao Qu,
Chaowei Xue (),
Jianning Ding (),
Liang Fang (),
Zhenguo Li () and
Xixiang Xu ()
Nature, 2024, vol. 635, issue 8039, 604-609 Abstract: Abstract Back-contact silicon solar cells, valued for their aesthetic appeal because they have no grid lines on the sunny side, find applications in buildings, vehicles and aircraft and enable self-power generation without compromising appearance1–3. Patterning techniques arrange contacts on the shaded side of the silicon wafer, which offers benefits for light incidence as well. However, the patterning process complicates production and results in power loss. We employed lasers to streamline the fabrication of back-contact solar cells and enhance the power-conversion efficiency. Using this approach, we produced a silicon solar cell that exceeded 27% efficiency. Hydrogenated amorphous silicon layers were deposited onto the wafer for surface passivation and to collect light-generated carriers. A dense passivating contact, which differs from conventional technology practice, was developed. Pulsed picosecond lasers operating at different wavelengths were used to create the back-contact patterns. The approach developed is a streamlined process for producing high-performance back-contact silicon solar cells, with a total effective processing time of about one-third that of the emerging mainstream technology. To meet the terawatt demand, we developed indium-less cells at 26.5% efficiency and precious silver-free cells at 26.2% efficiency. Thus, the integration of solar solutions into buildings and transportation is poised to expand with these technological advances. Date: 2024 Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:nat:nature:v:635:y:2024:i:8039:d:10.1038_s41586-024-08110-8 Ordering information: This journal article can be ordered from DOI: 10.1038/s41586-024-08110-8 Access Statistics for this article Nature is currently edited by Magdalena Skipper More articles in Nature from Nature |
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