Efficient perovskite solar cells processed in supercritical carbon dioxide
| Autor: | Gilbert Annohene, Gary Tepper |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Supercritical carbon dioxide Scanning electron microscope Annealing (metallurgy) General Chemical Engineering Photovoltaic system Energy conversion efficiency 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Chemical engineering Physical and Theoretical Chemistry 0210 nano-technology Absorption (electromagnetic radiation) Layer (electronics) Perovskite (structure) |
| Zdroj: | The Journal of Supercritical Fluids. 171:105203 |
| ISSN: | 0896-8446 |
| Popis: | Perovskite-based solar cells with high power conversion efficiency were produced by annealing the perovskite layer at low temperature in the presence of supercritical carbon dioxide (scCO2). Photovoltaic devices were produced with perovskite layers annealed at either 50 ℃ or 100 ℃, with and without the assistance of scCO2. For devices annealed at 50 ℃, the use of scCO2 resulted in an 88% increase in the power conversion efficiency (from 9.17% to 17.22%) in comparison to devices annealed without scCO2. For devices annealed at 100 ℃ the use of scCO2 resulted in a smaller (3%) improvement in power conversion efficiency (from 16.94% to 17.52%). The quality of the perovskite layer at each condition was analyzed using x-ray diffraction, scanning electron microscopy and optical absorption. It was determined that the improvement in the observed device power conversion efficiency corresponds to an improvement in the quality of the photoactive perovskite layer. |
| Databáze: | OpenAIRE |
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