A joint research team including scientists from the Chinese Academy of Scinces (CAS), Shijiazhuang Tiedao University in China and Chiao Tung University in Taiwan has developed a novel type of highly flexible and stable perovskite-based solar cell that could be used in wearable electronics.

The team stated that current PSCs are mainly made of a polymer substrate, which has been proven fragile, unstable and not adequately waterproof. The team built a new type of PSC based on an inorganic mica substrate, which could reduce the strain in the device even under large bending deformation. Mica is a mineral that separates easily into small flat transparent pieces of rock.

The mica-based PSCs exhibit a high-efficiency conversion of sunlight into electricity, with a photovoltaic conversion efficiency of 18%. It can also retain more than 91.7% of the original conversion efficiency after 5,000 cycles of large deformation bending, according to researchers.

In addition, the new PSCs are relatively stable against humidity under elevated temperatures.