For decades, photovoltaic (PV) module yellowing caused by UV exposure has been observed on solar arrays in operation. More than an aesthetic inconvenience, this phenomenon can severely impair performance and promote other degradation mechanisms undermining the photoprotection provided encapsulation. To understand how reaction may affect current encapsulation materials, silicon heterojunction (S...

Abstract Narrow-line Seyfert 1 (NLS1) galaxies are an important type of active galactic nucleus (AGN), generally expected to be accreting at a high Eddington rate. The properties their outflows and importance AGN feedback remain intriguing. We report on the discovery fast outflowing warm absorbers (WAs) in NLS1 PG 1001+054 with velocities range ∼7000–9000 km s −1 . They identified blueshifted L...

HIRSCH M. PRENANT G. and POULIQUEN Y. INSERM lJ.86, H&e1 Dieu. Pari.v (France) Puroose. The objective was to determine the supramolecular organization of the cornea1 stroma extracellular matrix (ECM) and the changes which occured during the acquisition of transparency. Methods. Mature corneas and chicken embryo corneas were used. Samples were frozen against a metal block cooled at -18O”C, trans...

Using metamaterial absorbers, we have shown that metallic layers in the absorbers do not necessarily constitute undesired resistive heating problem for photovoltaics. Tailoring the geometric skin depth of metals and employing the natural bulk absorbance characteristics of the semiconductors in those absorbers can enable the exchange of undesired resistive losses with the useful optical absorban...

We present results from Keck HIRES, KPNO 4m/RC Spec and HST FOS spectra of a low-redshift, close QSO pair and a close, higher-redshift QSO triplet in order to explore the size evolution, shape and clustering of Ly α absorbers. The results we highlight here indicate that there is no strong evidence for evolution of Ly α cloud size with redshift, that strong (Wo > 0.4Å) Ly α forest absorbers are ...

We present the results from our search for C iv in the intergalactic medium at redshifts z = 5.3−6.0. We have observed four z ∼ 6 QSOs with Keck/NIRSPEC in echelle mode. The data are the most sensitive yet taken to search for C iv at these redshifts, being 50% complete at column densities logNC IV ≈ 13.4. We find no C iv systems in any of the four sightlines. Taking into account our completenes...

Far-UV echelle spectroscopy of the radio-quiet QSO H1821+643 (zem=0.297), obtained with the Space Telescope Imaging Spectrograph (STIS) at approximately 7 km s-1 resolution, reveals four definite O vi absorption-line systems and one probable O vi absorber at 0.15<zabs<0.27. The four definite O vi absorbers are located near galaxies and are highly displaced from the quasar in redshift; these are...

&lt;p&gt;&lt;strong&gt;Abstract:&lt;/strong&gt; Over the past decade, lead halide perovskite light absorbers have been conventionally used absorbers. However, there is an urgent call for alternative materials with toxicity levels and poor stability to UV radiations. Antimony-based perovskites proven be a material unique optoelectronic properties, conventional fabrication processes, low-toxicity...

In this study, a high-throughput experimental protocol was established for yellowing inhibition of transparent plastics on the basis solution film casting microplates and ultraviolet/visible (UV/Vis) spectroscopic evaluation using microplate reader. A combination genetic algorithm realized large-scale exploration stabilizer formulations that consist commercially available hindered amine stabili...