The authors study exciton splitting at the interface of bilayer hybrid solar cells to better understand the physics controlling organic-inorganic device performance. Hydrogenated amorphous silicon a-Si:H /poly 3-hexylthiophene P3HT and a-Si:H/poly 2-methoxy-52 -ethyl-hexyloxy 1 ,4-phenylenevinylene MEH-PPV solar cells show photoresponse dominated by exciton production in the polymer. The a-Si:H...

An in-depth understanding of the excitation mechanism covalent organic frameworks (COF) materials is very important for preparation and modification two-dimensional materials. This paper investigates photoelectric properties poly(p-phenylenevinylene) (PPV)-based COFs using first principles quantum chemistry. Density functional theory (DFT) time-dependent DFT were employed to analyze state densi...

Bulk-heterojunction PPV (poly(p-phenylene vinylene))-CdSe submicron fibers have been prepared by introducing electrostatic interaction between thioglycolic acid capped CdSe nanocrystals and PPV precursor, subsequently with electrospinning and thermal conversion. The photoconductive device on a single PPV-CdSe fiber showed notable photoresponse, good response speed, wavelength-sensitivity, and r...

A complete genomic sequence of porcine parvovirus 2 (PPV-2) was detected by viral metagenome analysis on swine sera. A phylogenetic analysis of this genome reveals that it is highly similar to previously reported North American PPV-2 genomes. The complete PPV-2 sequence is 5,426 nucleotides long.

Advertising is one of the primary means for revenue generation for millions of websites and mobile apps. While the majority of online advertising revenues are based on payper-click, alternative forms such as impression-based display and video advertising have been growing rapidly over the past several years. In this paper, we investigate the problem of invalid traffic generation that aims to in...

Background. The use of echocardiography in intensive care settings impacts decision making. A prerequisite for the use of echocardiography is relative resistance to changes in volume status and levels of positive pressure ventilation (PPV). Studies on indices of diastolic function report conflicting results with regard to dependence on volume status. Evidence is scarce on PPV. Methods. Ten heal...

Diabetic cystoid macular oedema (DME) is a common cause of visual acuity (VA) decrease. Good anatomical results and VA of pars plana vitrectomy (PPV) in cases of macular hole internal limiting membrane (ILM) peeling leads to usage of this technique in DME. A favorable result even in a case without vitreoretinal traction leads to conclusion that pathogenesis of this disease is different. We anal...

BACKGROUND We investigated the outcome of 23-gauge transconjunctival pars plana vitrectomy (23G PPV) for the treatment of vitreoretinal disorder in patients with prior trabeculectomy. METHODS We retrospectively reviewed medical records of 23G PPV in 11 eyes that had functioning filtering blebs after trabeculectomy. The main outcome measures were the visual acuity, intraocular pressure (IOP) a...

In this work, a multifunctional platform based on the versatile function of cationic poly(p-phenylene vinylene) (PPV) derivative has been developed for white light-enhanced siRNA delivery in a remote control manner. Conjugated polyelectrolyte PPV, which possesses cationic and amphipathic features, can effectively self-assemble with siRNA and deliver siRNA into living cells. More importantly, PP...