Article Synopsis
- Enhancing the efficiency and stability of perovskite/silicon tandem solar cells is achieved by reducing charge transport losses and non-radiative recombination.
- The study implemented a hybrid two-step perovskite deposition with a surface treatment that improved charge carrier concentration, reducing recombination and increasing conductivity.
- The resulting high-performance solar cells achieved a conversion efficiency of 33.1% and demonstrated strong outdoor stability, particularly along the Red Sea Coast.
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Article Abstract
Reducing charge carrier transport losses, improving selectivity, and minimizing non-radiative recombination are essential for enhancing the efficiency and stability of perovskite/silicon tandem solar cells. We used a hybrid two-step perovskite deposition method that is compatible with industry-standard textured silicon, incorporating a perovskite surface treatment based on 1,3-diaminopropane dihydroiodide. The interaction of this molecule with the perovskite surface increased the majority charge carrier concentration at the electron-selective contact, which reduced interfacial recombination. Simultaneously, this field-effect passivation increased the electron concentration across the entire intrinsic perovskite absorber, which increased conductivity and reduced transport losses. Combined, this yields high-performance, fully-textured perovskite/silicon tandem solar cells, achieving a 1-sun AM1.5G conversion efficiency of 33.1% with an open-circuit voltage of 2.01 volts, and an extended outdoor stability in the Red Sea Coast.
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