Researchers at Pusan National University and the University of Oxford have made an advanced in the field of perovskite nanosheets as promising new laser materials. The team overcame the inherent limitations of CsPbBr quantum dots using perovskite nanosheets, which provide enhanced light amplification abilities. 

The researchers introduced an innovative waveguide pattern, which increased the gain and thermal stability of the perovskite nanosheets. This pattern improved the optical confinement and heat dissipation, offering a solution to the limitations previously faced with quantum dots. The research team also pioneered a new ‘gain analysis’ method known as the ‘gain contour’. This novel technique provides a more in-depth understanding of gain saturation across various spectrum energies and optical stripe lengths.

Perovskite/perovskite/silicon triple-junction cells can deliver higher efficiencies than single- or dual-junction solar cells, but achieving this is not without its challenges. In a recent study, researchers from King Abdullah University of Science and Technology (KAUST), Northwestern University, University of Toledo and University of Toronto combined with a synergistic additive strategy (using potassium thiocyanate and methylammonium iodide), to stabilize the top perovskite, thus addressing a major hurdle. The team fabricated a perovskite-perovskite-silicon triple-junction solar cell with a new passivation strategy based on the utilization of potassium and thiocyanate.

This approach leads to an efficiency of over 26% for 1 cm² triple-junction solar cells. The triple-junction solar cell is based on a 15.0%-efficient top perovskite solar cell modified with potassium thiocyanate (KSCN) and methylammonium iodide (MAI). According to the team, the triple-junction device displays a remarkable power conversion efficiency improvement compared to state-of-the-art devices.

Researchers at Imec have reported a metal halide perovskite LED (PeLED) stack that emits 1,000x more light “than state-of-the-art OLEDs”. The team developed a transparent PeLED architecture, that combines low optical losses with excellent current-injection properties. 

In this work, the team showed that perovskite semiconductor optical amplifiers and injection lasers are within reach using this type of transparent PeLED.

Chinese energy company Akcome has announced an investment of approximately 1 billion RMB (~USD 140 million) to establish a research and production base for heterojunction-perovskite tandem solar cells.

The initiative will be led by Akcome’s wholly-owned subsidiary, Zhejiang Akcome Future Technology Co., Ltd., in collaboration with the Hangzhou Qianjiang Economic Development Zone Management Committee.

Researchers from China's Qingdao University of Science and Technology, Beijing Huairou Laboratory and the Chinese Academy of Sciences have developed an additive with a conjugated structure, 2,2′-diamino-[1,1′-biphenyl]-4,4′-dicarboxylic acid (DBDA), containing amino and carboxyl groups. The additive was introduced to convert tensile strain to compressive strain in perovskite films. 

Lattice tensile strain generated during the preparation of perovskite thin films has detrimental effects on the efficiency and stability of perovskite solar cells (PSCs). The scientists in this work examined this additive as a way to mitigate these harmful effects.