Hydrogenation characteristics of p-type poly-Si passivating contacts on textured surface for double-sided TOPCon devices

IF 6.3 2区材料科学 Q2 ENERGY & FUELS

Solar Energy Materials and Solar Cells Pub Date : 2025-02-27 DOI:10.1016/j.solmat.2025.113542

Anna Damm , Mathias Bories , Jan Benick , Mario Hanser , Armin Richter , Anyao Liu , Zhongshu Yang , Stefan Lange , Paul-Tiberiu Miclea , Jana-Isabelle Polzin

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引用次数: 0

Abstract

An effective hydrogenation process for polycrystalline silicon based passivating contacts (TOPCon) is crucial to achieve a very high level of surface passivation. This work examines the hydrogenation characteristics of p-type TOPCon on textured surface morphology by applying dielectric layers such as AlO_x, SiN_x and stacks thereof followed by an activation in a furnace anneal or by fast-firing. In a direct comparison with n-type TOPCon, p-type TOPCon requires higher activation temperatures and a higher activation energy. For a successful integration of n-type and p-type TOPCon into bottom cell precursors with 726 mV implied V_oc for tandem devices, stacks featuring AlO_x are beneficial to increase the thermal stability especially for n-type TOPCon. With regards to fast-firing processes, the influence of an additional pre- or post-annealing step is investigated. The peak firing temperature can significantly be reduced when applying an annealing step beforehand and a post-firing anneal improves surface passivation to recombination current densities J_0s as low as 7.9 fA/cm² for p-type TOPCon on textured surface which is one of the lowest reported in literature.

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来源期刊

Solar Energy Materials and Solar Cells 工程技术-材料科学：综合

CiteScore

12.60

自引率

11.60%

发文量

513

审稿时长

47 days

期刊介绍： Solar Energy Materials & Solar Cells is intended as a vehicle for the dissemination of research results on materials science and technology related to photovoltaic, photothermal and photoelectrochemical solar energy conversion. Materials science is taken in the broadest possible sense and encompasses physics, chemistry, optics, materials fabrication and analysis for all types of materials.