Infrared photocurrent management in monolithic perovskite/silicon heterojunction tandem solar cells by using a nanocrystalline silicon oxide interlayer

• Published in: Optics express Vol. 26; no. 10; pp. A487 - A497
• Main Authors: Mazzarella, Luana, Werth, Matteo, Jäger, Klaus, Jošt, Marko, Korte, Lars, Albrecht, Steve, Schlatmann, Rutger, Stannowski, Bernd
• Format: Journal Article
• Language: English
• Published: United States 14-05-2018
• ISSN: 1094-4087; 1094-4087
• DOI: 10.1364/OE.26.00A487

We performed optical simulations using hydrogenated nanocrystalline silicon oxide (nc-SiO
:H) as n-doped interlayer in monolithic perovskite/c-Si heterojunction tandem solar cells. Depending on the adjustable value of its refractive index (2.0 - 2.7) and thickness, nc-SiO
:H allows to optically manage the infrared light absorption in the c-Si bottom cell minimizing reflection losses. We give guidelines for nc-SiO
:H optimization in tandem devices in combination with a systematic investigation of the effect of the surface morphology (flat or textured) on the photocurrent density. For full-flat and rear textured devices, we found matched photocurrents higher than 19 and 20 mA/cm
, respectively, using a 90 nm nc-SiO
:H interlayer with a refractive index of 2.7.