期刊
NANO ENERGY
卷 95, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2021.106899
关键词
Contact resistivity; Surface passivation; Carrier selectivity; Charge transport; Thermal stability; Industrial firing
类别
资金
- Chinese Academy of Sciences (CAS)
- Zhejiang Energy Group [znk-2018-118]
- Ministry of Education of the P.R.C. (111 Project 2.0) [BP0719016]
- BK21 project of the Ministry of Education of Korea
- National Natural Science Foundation of China [61650110517]
- Natural Science Foundation of Ningbo [2017A610095]
- National Key Research and Development of China [2018 TFB1500103]
- [K-W.A.C]
- [2.0: BP0719016]
Carrier-selective crystalline silicon heterojunction solar cells have achieved high lab-scale efficiencies. Apart from wafer thickness design, selecting appropriate passivation schemes and materials is crucial for industrial adoption. Reducing process complexity and recombination losses are essential for maximizing performance.
Carrier-selective crystalline silicon heterojunction (SHJ) solar cells have already reached superior lab-scale ef-ficiencies. Besides judicious wafer thickness design, the optimal choice of passivation schemes and carrier-selective materials is essential for industry adoption. Appropriate reduction of process complexity and perfor-mance benefits through minimal recombination losses are key. Thus, along with well-designed back contacts, the development of low-temperature processable transparent passivating stacks that act as carrier-selective contacts (CSCs) is highlighted for their potential in circumventing the limited open-circuit photovoltage and contact-related losses in mainstream solar cells. In this review, effective passivation schemes deploying materials ranging from undoped metal oxides (MOs) to doped silicon are evaluated, with a focus on their significance for industrially viable passivating contact development. Passivation stack architectures with SiOx/heavily doped polycrystalline silicon (n(+)-/p(+)-poly-Si) realize the most attractive polysilicon-on-oxide (POLO) junctions and related schemes, e.g., combined with tunnel oxide passivated contact (TOPCon) and interdigitated back contact (IBC) solar cells. It is envisioned that the industrial trend is to eventually shift from the p-Si passivating emitter rear contact (PERC) and passivated emitter and rear polysilicon (PERPoly), towards TOPCon architectures, due to high manufacturing yields and compatibility with large-area metal screen printing and alternative bifacial designs.
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