Progression towards high efficiency perovskite solar cells via optimisation of the front electrode and blocking layer
| Autor: | Arnaud Walter, Björn Niesen, Davide Sacchetto, John L. Hodgkinson, Soo-Jin Moon, Sylvain Nicolay, Ian M. Povey, Matthias Bräuninger, Christophe Ballif, Mohammad Afzaal, Martyn E. Pemble, Heather M. Yates, Melissa McCarthy |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Spin coating
Materials science business.industry Nanotechnology 02 engineering and technology General Chemistry Chemical vapor deposition Sputter deposition 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 7. Clean energy 0104 chemical sciences Atomic layer deposition Sputtering Materials Chemistry Optoelectronics Thin film 0210 nano-technology business Sheet resistance Perovskite (structure) |
| ISSN: | 2050-7526 |
| Popis: | The effects of a fluorine doped tin oxide (FTO) electrode, titanium dioxide (TiO2-x) blocking layer (BL) and perovskite (methyl ammonium lead triiodide) preparation on the overall properties of the photovoltaic cells have been studied. The FTO electrode was deposited by atmospheric pressure chemical vapour deposition (APCVD) and the hole blocking layer by spin coating, atomic layer deposition (ALD) or sputtering. We have shown the importance of obtaining uniform thin films of FTO, with low sheet resistance to aid the formation of pin hole free uniform TiO2-x, blocking layers and hence well adhered, perovskite layers. The optimal BL thickness was 20 nm, while thicker films gave decreased shunt resistance and thinner a greater number of pin holes through the layers. We also showed that the conformal nature of ALD and magnetron sputtering, along with their increased uniformity control over spin coating again improved cell efficiency. The main improvement comes for the smaller R-oc. attributed to an improved electrical transport through particularly the sputtered TiO2-x blocking layer. After identifying the optimised parameters, all the properties were combined to fabricate large solar cells (1 cm(2)) yielding power conversion efficiencies beyond 16%. |
| Databáze: | OpenAIRE |
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