On the low-temperature efficiency of photoluminescence in a-Si: H and other materials

Abstract

We present new results on the excitation intensity and temperature dependence of the photoluminescence efficiency below lOOK in a range of materials, largely but not exclusively based on a-Si : H. The results indicate that radiative rates which increase with increasing temperature, along with non-radiative rates which increase with intensity, are present in doped and undoped a-Si:H, a-Si:N:H, microcrystalline Si : H and crystalline As,Se,. A range of a-Si : H and a-Si: N : H films with different photoluminescence efficiencies has been investigated and provides further evidence for an intensity-dependent radiative rate, as well as for a sample-dependent competing non-radiative path. We discuss the mechanisms of these processes in terms of currrent models, suggesting links between the two intensity-dependent processes.

Mitochondrial‐morphology‐targeted breeding of industrial yeast strains for alcohol fermentation

“…Indeed, O 2 addition is used to increase the fermentation rate in the case of sluggish fermentation under oenological (winemaking) conditions, and it has been confirmed that this effect is efficient only at the end of the cell growth phase [7]. O 2 is required for sterol biosynthesis and fatty acid desaturation, leading to the production of sterols and desaturated fatty acids within yeast cells [8][9][10][11]. However, even without O 2 , fermentation still advances, maybe through the incorporation of sterols and fatty acids into yeast cells from the medium.…”

Extracting Kinship from Obituary to Enhance Electronic Health Records for Genetic Research

“…Usually, NER and RE are considered as two separate and sequential tasks (NER precedes RE). Most information extraction systems in biomedicine, including those mining biomedical literature to extract adverse drug events, and molecular interactions between drug, gene and proteins, are built on a battery of pipeline modules integrating NER and RE tasks (Miwa et al, 2012;Kang et al, 2014;Yildirim et al, 2014;Sun et al, 2017;Li et al, 2013;Li et al, 2017). However, pipeline models have inherent limitations: (i) The error from NER will propagate to RE.…”