Low-temperature processed efficient and colourful semitransparent perovskite solar cells for building integration and tandem applications

Mushfika Baishakhi Upama, Md Arafat Mahmud, Haimang Yi, Naveen Kumar Elumalai, Gavin Conibeer, Dian Wang, Cheng Xu, Ashraf Uddin

Research output: Contribution to journalArticle

Abstract

Due to excellent performance and low fabrication costs, perovskite solar cells have become an attractive choice for building integrated photovoltaics (BIPV), especially semitransparent windows. Semitransparent perovskite solar cells are also useful as the upper sub-cell in tandem applications. In this study, we demonstrate efficient perovskite solar cells with good transparency in the visible spectrum (400–800 nm). The device efficiency and transparency were controlled by varying the perovskite layer thickness, including devices with a perovskite thickness as low as 40 nm. A dielectric/metal/dielectric (D/M/D) electrode was used as the transparent back electrode. The best performing device exhibited >9% efficiency at 12.4% average visible transparency. By reducing the perovskite layer thickness, the transparency further increased to 20.5% at an efficiency of 3.5%. Furthermore, perovskite layer thickness-dependent hysteresis behaviour, colour perception in human eye and month-long systematic degradation patterns are investigated and discussed comprehensively. The resulting solar cells are one of the highest performing semitransparent perovskite solar cells using D/M/D back electrode and a significant step forward to BIPV and tandem applications.
Original languageEnglish
Pages (from-to)401-411
Number of pages11
JournalOrganic Electronics
Volume65
DOIs
Publication statusPublished - Feb 2019
Externally publishedYes

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