A team of researchers led by Professor Biwu Ma from Florida State University demonstrated a new approach to building efficient and spectrally stable red perovskite LEDs. The team developed a simple solution processing method followed by thermal annealing to prepare highly luminescent ultra-smooth polymer–perovskite composite thin films with tunable emissions from red to deep-red.

Light emitting diodes (LEDs) incorporating inorganic, organic, or nanoscale materials are highly promising for solid-state lighting and displays. Despite the significant progress achieved in green emitting perovskite LEDs in recent years, blue or red emitting LEDs still remain a challenge with regards to their performance and spectral stability during operation.

A joint team of researchers led by Professor Federico Rosei at the Institut national de la recherche scientifique (INRS), and Dr. Riad Nechache from École de technologie supérieure (ÉTS), both located in Montreal, Canada, have developed a composite perovskite thin film made of two different inorganic oxide materials that significantly improves the performance of solar cells.

The team demonstrated a cell in which the open-circuit voltage and short-circuit photocurrent are tunable by varying the electrical resistance of the device, which in turn is controlled by externally applying voltage pulses. This provides an alternative way of achieving highly stable, high-efficiency conversion.

Researchers at Aalto University in Finland have designed a new, simplified method for testing solar cells based on perovskite and dye sensitized technologies for degradation. This presumably follows Aalto's findings from February 2018 regarding deficiencies in current aging tests performed on perovskite-based solar cells.

The researchers explain that their fast, low threshold photography method could detect even slight disintegration in a perovskite structure, with more reliable results than optical measurement devices, and lower complexity and labor requirements than more commonly used x-ray crystallography.

The Solar Energy Research Institute of Singapore (SERIS) at the National University of Singapore (NUS) has announced a new R&D goal to develop a commercially viable thin-film-on-silicon tandem solar cell with 30% conversion efficiencies.

SERIS researchers will collaborate with Nanyang Technological University (NTU) and Campus for Research Excellence and Technological Enterprise (CREATE) of NRF on both III-V and perovskite materials, while SERIS will develop optimized silicon bottom cells.