Improving near-infrared luminescence in Er doped CsPbBr quantum dots glasses through a certain energy transfer process.

Er has received extensive attention due to its excellent optical properties, especially its emission at 1535 nm in atmospheric propagation window. Enhancement and regulation of 1535 nm emission of Er is of great significance to optical communication. In this work, growing of CsPbBr QDs has been controlled through adjusting annealing time which would precisely regulate conduction band of CsPbBr QDs to match energy levels of Er enabling energy transfer between Er and CsPbBr QDs.

Extraction of polysaccharides from by fermentation with response surface methodology.

is a kind of traditional Chinese medicine used to treat weak spleens, stomach problems, anemia, and fatigue. Polysaccharide is one of main components of . In this study, response surface methodology (RSM) was used to optimize the extraction parameters of polysaccharides (CPP) by fermentation.