Mesoscopic solar cells, based on solution-processed organic–inorganic perovskite absorbers, are a promising avenue for converting solar to electrical energy
Scientist in laboratory examinates samples and chemical fluids.
Eran Edri, Saar Kirmayer, David Cahen, and Gary Hodes
Mesoscopic solar cells, based on solution-processed organic–inorganic perovskite absorbers, are a promising avenue for converting solar to electrical energy. We used solution-processed organic–inorganic lead halide perovskite absorbers, in conjunction with organic hole conductors, to form high voltage solar cells. There is a dire need for low-cost cells of this type, to drive electrochemical reactions or as the high photon energy cell in a system with spectral splitting. These perovskite materials, although spin-coated from solution, form highly crystalline materials. Their simple synthesis, along with high chemical versatility, allows tuning their electronic and optical properties. By judicious selection of the perovskite lead halide-based absorber, matching organic hole conductor, and contacts, a cell with a ∼ 1.3 V open circuit voltage was made. While further study is needed, this achievement provides a general guideline for additional improvement of cell performance.
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