Researchers Propose Metric for Stability of Perovskite Solar Cells

Published Date : Aug 31, 2018

The focus of the scientific fraternity on perovskite solar cells has increased massively in the recent years owing to the high efficiency of solar power conversion of these cells, which has been demonstrated to be over 22% in several studies so far. The lower base costs and capital expenditure incurred in the production of these cells also make up a good case for them when compared with the conventional varieties of silicon-based solar cells.

Now, scientists have demonstrated a way through which perovskites can be made with features that prove to be ideal for the material’s use in solar power cells. The larger application of this experiment can allow the easy development of solar cells that demonstrate much better conversion efficiencies and are much more resistant to environmental elements. However, researchers suggest that to be commercially viable, perovskite solar cells must demonstrate efficiency over a span of at least 25 years of consistent service. If the cells undergo significant degradation over this span, they may not prove to be as viable in a long-term scenario as demonstrated by several studies.

While research activities are underway aimed at the improvement of stability of perovskite, the fact that no general standards are available at present which can be used to measure the stability of solar cells made from perovskite also presents vast challenges ahead of the commercial use of perovskite solar cells. But research activities undertaken by researchers at the EPFL University seem to have resolved this challenge to a certain extent.

The researchers have examined the impact of a variety of environmental factors on the aging of these cells, include the effect of temperature, impact of atmosphere, electrical load, illumination of the level of sunlight, and the combined impact of all these factors together. This data-driven methodology proposed for the standardization of the process of measuring degradation, aging, and stability of perovskite solar cells could improve the applicability of perovskite solar cells in the near future. The study has been published in this week in the Nature Communications journal.