Researchers from Lithuania improve the efficiency of perovskite cells through passivation

A group of chemists from Kaunas University of Technology (KTU) in Lithuania, together with researchers from China, Italy, Switzerland and Luxembourg, were able to improve the stability of perovskite solar cells using a novel passivation method. Various isomers of phenylethylammonium iodide synthesized by KTU were used here.
The perovskite solar cells treated in this way achieved efficiencies of up to 23.9, although a measurement of efficiency after 1,008 hours showed a drop in output of around 15 percent. Three-quarters of the passivated cells achieved initial efficiencies above 22 percent, while the control group without passivation was about two percentage points lower. The mini-solar module made from the best nine cells, with an area of 26 square centimeters, achieved an efficiency of 21.4 percent on the active area for an overall module efficiency of 19.3 percent. Measurements of the module were conducted at the Swiss Federal Institute of Technology in Lausanne (EPFL), Switzerland. The results were published in the journal Nature Communications.
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