Engineering · Electrical and Electronic Engineering
Researchers used a chiral form of phosphoserine in the lead iodide precursor for perovskite solar cells. The best device reached 26.04% efficiency and retained 90.2% of its initial efficiency after 1,000 hours of maximum-power operation.
Researchers report an as-cast organic solar cell with a power-conversion efficiency of 20.11%, or 19.69% in certified testing. The approach also produced devices with 15.12% efficiency over an area of 20.17 square centimeters, pointing to a simpler route for making larger solar cells.
Researchers used a precursor additive called CGBA to control how wide-bandgap perovskite films formed. The resulting cell reached 21.43% efficiency, while an all-perovskite tandem reached 29.63%; unencapsulated target devices retained 93% of their starting efficiency after 4,500 hours in nitrogen.
A review examines why making large, uniform perovskite films is difficult even though small-area perovskite solar cells have reached certified efficiencies of around 28%. It finds that controlling crystal formation across the whole film is central to producing reliable modules at scale.
Researchers developed a two-zone continuous-flow reactor that made and surface-treated cesium lead bromide perovskite nanocrystals. In a three-hour run, it produced 1.8 liters of dispersion and 6.12 grams of purified powder, while increasing light-emission efficiency from 69% to 95%.
A compact near-infrared device uses lead-free perovskite materials to screen alcohol and water content in commercial samples. Its circuit turns optical signals into five visual levels, covering alcohol concentrations of 30–60% and water contents of 45–100%.
Nanopore confinement enabled delayed fluorescence in crystalline organic frameworks, allowing them to use energy that would otherwise be lost through non-emissive triplet states. The resulting materials formed high-efficiency light-emitting films and were used in solution-processed organic light-emitting diodes, although the abstract does not report detailed performance figures.
