Fig. 1: Crystalline silicon solar cell champion results and the best result in this work. | Nature Communications

Fig. 1: Crystalline silicon solar cell champion results and the best result in this work.

From: 27%-efficiency silicon heterojunction cell with 98.6% cell-to-module ratio driving new momentum towards the 29.4% limit

Fig. 1: Crystalline silicon solar cell champion results and the best result in this work.

a Champion cell leads composed of two groups of cell technologies: FBCs are higher on VOC and FF because of full face passivated contact but lower on JSC, primarily because of front-side shading from fingers and busbars; BCs excel in monofacial efficiency measurement but typically run low on FF because of excessive processing steps. All the cell records come from Martin A. Green’s “Table” (from v30 to v65), with the exception of the work discussed in this paper. b Our recent SHJ (an FBC cell) result verified by ISFH CalTec. The measurement is based on an apertured (ap) calibration practice to eliminate edge effects, which is typical for rectangular half-cells. The wafer thickness is 140 µm, and the front side H-pattern has an 18-busbar design. c The reported cell has a monofacial design with a magnesium fluoride (MgF2) antireflection layer at the front and MgF2/silver film stacks at the rear side. More importantly, we have a rear-side-polished structure to further improve the surface passivation. The film thickness reported is for the textured surface (front) and polished surface (back). TCO refers to transparent conductive oxide films.

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