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In this viewpoint, recent hot topics in the photovoltaic community, interdigitated back contact (IBC) cells, are systematically reviewed from the view of device configuration. Two categories of IBC designs on the most popular perovskite solar cells (PSCs) were discussed, and a planar back-contact perovskite module was first proposed. The device configuration, fabrication methods, working mechanism, optimization strategies, and future development directions of this novel PSC module were put forward to show its superiorities in the module performance, processing difficulty, and extensible functionality among present perovskite modules, presenting promising potential to improve the competitiveness of perovskite technology in the photovoltaic market.
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