Identification of embedded nanotwins at c-Si/a-Si:H interface limiting the performance of high-efficiency silicon heterojunction solar cells
Article
Article Title | Identification of embedded nanotwins at c-Si/a-Si:H interface limiting the performance of high-efficiency silicon heterojunction solar cells |
---|---|
ERA Journal ID | 211130 |
Article Category | Article |
Authors | Qu, Xianlin, He, Yongcai, Qu, Minghao, Ruan, Tianyu, Chu, Feihong, Zheng, Zilong, Ma, Yabin, Chen, Yuanping, Ru, Xiaoning, Xu, Xixiang, Yan, Hui, Wang, Lihua, Zhang, Yongzhe, Hao, Xiaojing, Hameiri, Ziv, Chen, Zhi-Gang, Wang, Lianzhou and Zheng, Kun |
Journal Title | Nature Energy |
Journal Citation | 6 (2), pp. 194-202 |
Number of Pages | 10 |
Year | 2021 |
Publisher | Nature Publishing Group |
Place of Publication | United Kingdom |
ISSN | 2058-7546 |
Digital Object Identifier (DOI) | https://doi.org/10.1038/s41560-020-00768-4 |
Web Address (URL) | https://www.nature.com/articles/s41560-020-00768-4 |
Abstract | The interface of high-quality crystalline silicon/hydrogenated amorphous silicon (c-Si/a-Si:H) is indispensable for achieving the ideal conversion efficiency of Si heterojunction solar cells. Therefore, it is extremely desirable to characterize and control the interface at the atomic scale. Here, we employ spherical aberration-corrected transmission electron microscopy to investigate the atomic structure of the c-Si/a-Si:H interface in high-efficiency Si heterojunction solar cells. Their structural evolution during in situ annealing is visualized at the atomic scale. High-density embedded nanotwins, detrimental to the device performance, are identified in the thin epitaxial layer between c-Si and a-Si:H. The nucleation and formation of these nanotwins are revealed via ex situ and in situ high-resolution transmission electron microscopy. Si heterojunction solar cells with low-density nanotwins are fabricated by introducing an ultra-thin intrinsic a-Si:H buffer layer and show better performance, indicating that the strategy to restrain embedded nanotwins can further enhance the conversion efficiency of Si heterojunction solar cells. |
Keywords | Crystalline silicons; Device performance; Silicon heterojunctions; In-situ annealing; Heterojunction solar cells; Spherical aberrations |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 400402. Chemical and thermal processes in energy and combustion |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Beijing University of Technology, China |
Hanergy Chengdu Research and Development Center, China | |
Jiangsu University, China | |
University of New South Wales | |
Centre for Future Materials | |
University of Queensland |
https://research.usq.edu.au/item/zq5q0/identification-of-embedded-nanotwins-at-c-si-a-si-h-interface-limiting-the-performance-of-high-efficiency-silicon-heterojunction-solar-cells
2
total views0
total downloads2
views this month0
downloads this month