High-Efficiency Si Perovskite Tandem Solar Cells

Publieke samenvatting

Crystalline silicon PV technology is reaching its practical efficiency limit. The emergence of perovskite solar cells presents an opportunity for high efficiency modules of a stack (“tandem”) of perovskite on crystalline silicon solar cells. Dutch industry is well positioned to play a strong role in this novel technology.

The goal of the project is to combine development of a novel advanced industrial crystalline silicon cell with state of the art perovskite solar cell and module technology, resulting in tandem cell efficiency of 28% and module efficiency of 25% (area 6x6 inch2), at Technology Readiness Level 5.

Korte omschrijving
Tempress and ECN will develop a novel silicon cell, with polysilicon passivating contacts on both front and rear side, advantageous and uniquely suited for tandem operation. The performance as bottom cell in a tandem can be very high, while it can be manufactured with a lean process flow. TNO and ECN will develop efficient semi-transparent perovskite solar cells and modules using scalable deposition processes and laser-based monolithic interconnection. TU/e will develop and contribute ALD processes for selective charge transport layers and highly transparent conductive oxides, as well as ultra-thin chemical passivation layers directly on the perovskite absorber to improve the perovskite’s performance and stability to subsequent processes. TNO and ECN will perform integration to 4-terminal tandems.
This project is part of an international SOLAR-ERA.NET proposal. Partner projects will contribute high quality perovskites made by vacuum processing, and 2-terminal applications.

The project will deliver industrial processes for a 6 inch bottom cell with efficiency >10.4% in filtered operation, and semitransparent perovskite cells with efficiency >18%. Minimodules will be produced with aperture area efficiency >25% and area of 6x6 inch2. Industrial feasibility and barriers for commercial exploitation will be analysed.