Crystalline silicon perovskite tandem battery structure

What is the device structure of a 2T perovskite/Si tandem cell?

(C) Device structure of a 2T perovskite/Si tandem cell. The perovskite layer is deposited by solution processed on a double-side textured Si bottom cell. The cross-section SEM images shows the textured Si with pyramid morphology and it is fully covered by a perovskite top cell with thick perovskite film.

How efficient are perovskite/silicon tandem solar cells?

Tandem solar cells with a perovskite top cell and crystalline silicon (c-Si) bottom cell have reached certified efficiencies of 28% (on 1 cm2 by Oxford PV) in just about 4 years. This success is mainly attributed to the optimized design in the perovskite top cell and the crystalline silicon bottom cell.

What is a perovskite/silicon tandem?

The highest performance perovskite/silicon tandems are now in the positive–intrinsic–negative (p–i–n) configuration, implying that, for the top cell, first the hole transport layer (HTL, p -type) was deposited, followed by the perovskite (i layer) and the electron transport layer (ETL, n -type).

Where does a monolithic perovskite/silicon tandem rely on a silicon bottom cell?

Today, most monolithic perovskite/silicon tandems rely on the TCO top electrode of the silicon bottom cell as part of the interconnection junction 1, 6, 7, 8.

Do C-Si bottom cells improve the performance of perovskite/silicon tandem cells?

Our review will emphasize the important role of the C-Si bottom cell with different passivation structures for perovskite/silicon tandem cells, which provides a guidance to enhance the performance of tandem cells.

How do perovskite/c-Si tandem solar cells work?

Perovskite/c-Si tandem solar cells can be constructed as two configurations: two-terminal (2 T) and four-terminal (4 T). In the case of 2 T tandems,top and bottom subcells are electrically connected through interconnecting layers(ICLs), while the two subcells are independently connected for 4 T tandems.