High Open-Circuit Voltage Solar Cells Based on Organic-Inorganic Lead Bromide Perovskite.
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.
Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot, 76100, Israel.
Eran
E
Edri
Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot, 76100, Israel.
Saar
S
Kirmayer
Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot, 76100, Israel.
David
D
Cahen
Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot, 76100, Israel.
Gary
G
Hodes
high open-circuit voltage cells; mesoscopic solar cells; organic−inorganic hybrids; perovskite lead-halide absorbers