| Autor: |
Yuan Q; Department of Physics, University of Oxford, Clarendon Laboratory, Parks Road, OxfordOX1 3PU, United Kingdom., Lohmann KB; Department of Physics, University of Oxford, Clarendon Laboratory, Parks Road, OxfordOX1 3PU, United Kingdom., Oliver RDJ; Department of Physics, University of Oxford, Clarendon Laboratory, Parks Road, OxfordOX1 3PU, United Kingdom., Ramadan AJ; Department of Physics, University of Oxford, Clarendon Laboratory, Parks Road, OxfordOX1 3PU, United Kingdom., Yan S; Department of Physics, University of Oxford, Clarendon Laboratory, Parks Road, OxfordOX1 3PU, United Kingdom., Ball JM; Department of Physics, University of Oxford, Clarendon Laboratory, Parks Road, OxfordOX1 3PU, United Kingdom., Christoforo MG; Department of Physics, University of Oxford, Clarendon Laboratory, Parks Road, OxfordOX1 3PU, United Kingdom., Noel NK; Department of Physics, University of Oxford, Clarendon Laboratory, Parks Road, OxfordOX1 3PU, United Kingdom., Snaith HJ; Department of Physics, University of Oxford, Clarendon Laboratory, Parks Road, OxfordOX1 3PU, United Kingdom., Herz LM; Department of Physics, University of Oxford, Clarendon Laboratory, Parks Road, OxfordOX1 3PU, United Kingdom.; Institute for Advanced Study, Technical University of Munich, Lichtenbergstrasse 2a, GarchingD-85748, Germany., Johnston MB; Department of Physics, University of Oxford, Clarendon Laboratory, Parks Road, OxfordOX1 3PU, United Kingdom. |
| Abstrakt: |
Vacuum deposition is a solvent-free method suitable for growing thin films of metal halide perovskite (MHP) semiconductors. However, most reports of high-efficiency solar cells based on such vacuum-deposited MHP films incorporate solution-processed hole transport layers (HTLs), thereby complicating prospects of industrial upscaling and potentially affecting the overall device stability. In this work, we investigate organometallic copper phthalocyanine (CuPc) and zinc phthalocyanine (ZnPc) as alternative, low-cost, and durable HTLs in all-vacuum-deposited solvent-free formamidinium-cesium lead triodide [CH(NH 2 ) 2 ] 0.83 Cs 0.17 PbI 3 (FACsPbI 3 ) perovskite solar cells. We elucidate that the CuPc HTL, when employed in an "inverted" p-i-n solar cell configuration, attains a solar-to-electrical power conversion efficiency of up to 13.9%. Importantly, unencapsulated devices as large as 1 cm 2 exhibited excellent long-term stability, demonstrating no observable degradation in efficiency after more than 5000 h in storage and 3700 h under 85 °C thermal stressing in N 2 atmosphere. |
