Scientists have developed a recent generation of perovskite solar cells capable of generating electricity even in rainy conditions, a breakthrough that could significantly expand the potential of renewable energy sources. The innovation, detailed in the scientific journal Nano Energy, involves a novel nanolayer applied to existing perovskite solar cell technology.
The key to the advancement lies in the nanolayer’s ability to capture energy from the kinetic forces created when raindrops impact the panel. This phenomenon, known as the triboelectric effect, converts physical deformation of the material into electrical current. While the amount of energy generated is currently small – several milliwatts per square centimeter – researchers say it represents a significant contribution, offsetting energy losses typically experienced during rainfall.
“This is a significant step towards creating solar panels that function practically independently of the weather,” said a researcher involved in the project, as reported by Zive.aktuality.sk. The nanolayer also serves a protective function, shielding the perovskite cells from external influences and preventing chemical degradation, while simultaneously improving light absorption.
Perovskite solar cells have long been touted as a potential successor to traditional silicon-based panels due to their lower cost and potentially higher efficiency. According to Smartenergyforum.sk, Oxford PV has produced perovskite silicon tandem solar cells with a record efficiency of 26.8% in the M6 format, manufactured in small series in Brandenburg, Germany. However, a major drawback of perovskite technology has been its relatively short lifespan compared to silicon.
This new development aims to address that challenge. By extending the lifespan of perovskite panels and harnessing energy from rainfall, the research team hopes to enhance the overall efficiency and viability of this emerging technology. Oxford PV’s CEO, David Ward, stated that the company’s tandem solar cells are “demonstrating record performance when assembled into solar panels,” according to solarninovinky.cz. The tandem panels currently achieve a power output of up to 421 watts per 1.68 square meters.
The research builds on previous efforts to improve perovskite technology. While perovskites were expected to disrupt the solar panel market, full-scale adoption has been hampered by durability concerns. The team’s work represents a continuing effort to refine the technology and unlock its full potential.
