Stability | Perovskite-Info

KAUST team develops highly stable and industry-ready perovskite-silicon tandem solar cell

Researchers from King Abdullah University of Science and Technology (KAUST) have fabricated efficient, two-terminal monolithic perovskite-silicon tandem solar cells and tested them outdoors. The tandem device that resulted from this research was found to be more stable than conventional perovskite cells and, importantly, optimized for use in industry.

Perovskite/silicon cells under test at KAUST outdoor facility

The findings of KAUST Research Scientists Dr. Erkan Aydin and Dr. Thomas Allen, and colleagues in Professor Stefaan De Wolf's group, indicate that the temperature dependence of both the silicon and perovskite bandgaps—which follow opposing trends—shift the current-matching-optimization point away from that for two-terminal tandems under standard test conditions.

Read the full story | 1 comment | Posted: Sep 15, 2020

Surface engineering of perovskites can improve stability of perovskite solar cells

Researchers from East China University of Science and Technology and Australia-based Griffith University have examined the effects of surface decoration of perovskites on the stability of resulting perovskite solar cells. They reported that such configurations have shown to be more stable than the untreated surface of perovskites.

The team reported a chelation strategy for surface engineering of CsPbI₂Br perovskite, in which dithiocarbamate molecules can be coordinate to surface Pb sites via strong bidentate chelating bonding. Such chelated CsPbI₂Br perovskite can realize excellent passivation of surface under-coordinated defects, reaching a power conversion efficiency of 17.03% and an open-circuit voltage of 1.37 V of CsPbI₂Br solar cells.

Read the full story Posted: Aug 28, 2020

Novel graphene-based encapsulation opens door to robust perovskite solar cells

Researchers at Pusan National University, Gwangju Institute of Science and Technology and the Korea Institute of Machinery & Materials (KIMM) in South Korea have tackled perovskite solar cells' stability issues by designing a graphene-based encapsulation technique.

Roll-transferred graphene encapsulant for robust perovskite solar cells image

The team introduced a highly flexible and stable graphene encapsulant by adopting the dry transfer method based on a roll-based process.

Read the full story Posted: Jul 27, 2020

Researchers shed new light on the causes of the degradation perovskites undergo when exposed to sunlight

Research by scientists at the Eindhoven University of Technology and universities in China and the US sheds new light on the causes of the degradation perovskites undergo when exposed to sunlight and paves the way for designing new perovskite compositions for the ultimate stable solar cells.

New research by scientists at TU/e and universities in China and the US sheds light on the causes of perovskite solar cell degradation image

The new research focuses on perovskite solar cells made from formamidinium-caesium lead iodide, a halide compound that has become increasingly popular as it combines high efficiency and reasonable heat resistance with low manufacturing costs.

Read the full story Posted: Jul 15, 2020

Researchers shed light on the origin of perovskite instability

Researchers in the Cava Group at the Princeton University Department of Chemistry have lifted the mystery surrounding the reasons for instability in the inorganic perovskite cesium lead iodide (CsPbI₃), known for its potential in creating highly efficient solar cells.

Using single crystal X-ray diffraction performed at Princeton University and X-ray pair distribution function measurements performed at the Brookhaven National Laboratory, the Princeton researchers detected that the source of thermodynamic instability in the halide perovskite cesium lead iodide (CsPbI₃) is the inorganic cesium atom and its “rattling” behavior within the crystal structure.

Read the full story Posted: Jul 07, 2020