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Scientist working in a laboratory and plants

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

Scientist working in a laboratory and plants

Scientist in laboratory examinates samples and chemical fluids.

Authors
Eran Edri, Saar Kirmayer, David Cahen, and Gary Hodes

Abstract
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.

Full Article

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