Carbon Nanoparticles in High‐Performance Perovskite Solar Cells |
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| Authors: | Mozhgan Yavari Mohammad Mazloum‐Ardakani Somayeh Gholipour Nevena Marinova Juan Luis Delgado Silver‐Hamill Turren‐Cruz Konrad Domanski Nima Taghavinia Michael Saliba Michael Grätzel Anders Hagfeldt Wolfgang Tress |
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| Affiliation: | 1. école Polytechnique Fédérale de Lausanne, Laboratory of Photomolecular Science, Lausanne, Switzerland;2. Department of Chemistry, Faculty of Science, Yazd University, Yazd, Iran;3. Department of Physics, Alzahra University, Tehran, Iran;4. Non‐metallic Materials Research Department, Niroo Research Institute (NRI), Tehran, Iran;5. POLYMAT, University of the Basque Country UPV/EHU, Avenida de Tolosa 72 & Faculty of Chemistry, Donostia – San Sebastián, Spain;6. Ikerbasque, Basque Foundation for Science, Bilbao, Spain;7. Benemérita Universidad Autónoma de Puebla. CIDS, Av. San Claudio y 18 Sur, Col. San Manuel, Ciudad Universitaria, Puebla, Pue, México;8. école Polytechnique Fédérale de Lausanne, Laboratory for Photonics and Interfaces, Lausanne, Switzerland;9. Department of Physics, Sharif University of Technology, Tehran, Iran;10. Institute for Nanoscience and Nanotechnology, Sharif University of Technology, Tehran, Iran |
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| Abstract: | In the past few years, organic–inorganic metal halide ABX3 perovskites (A = Rb, Cs, methylammonium, formamidinium (FA); B = Pb, Sn; X = Cl, Br, I) have rapidly emerged as promising materials for photovoltaic applications. Tuning the film morphology by various deposition techniques and additives is crucial to achieve solar cells with high performance and long‐term stability. In this work, carbon nanoparticles (CNPs) containing functional groups are added to the perovskite precursor solution for fabrication of fluorine‐doped tin oxide/TiO2/perovskite/spiro‐OMeTAD/gold devices. With the addition of CNPs, the perovskite films are thermally more stable, contain larger grains, and become more hydrophobic. NMR experiments provide strong evidence that the functional groups of the CNPs interact with FA cations already in the precursor solution. The fabricated solar cells show a power‐conversion efficiency of 18% and negligible hysteresis. |
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| Keywords: | carbon nanoparticles perovskite solar cells photovoltaic devices thermal stability |
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