Abstract：
:Multi-junction solar cells made by assembling semiconductor materials with different bandgap energies have hold the record conversion efficiencies for many years and are currently approaching 50%. Theoretical efficiency limits make use of optimum designs with the right lattice constant-bandgap energy combination, which requires a 1.0-1.15 eV material lattice-matched to GaAs/Ge. Nevertheless, the lack of suitable semiconductor materials is hindering the achievement of the predicted efficiencies, since the only candidates were up to now complex quaternary and quinary alloys with inherent epitaxial growth problems that degrade carrier dynamics. Here we show how the use of strain-balanced GaAsSb/GaAsN superlattices might solve this problem. We demonstrate that the spatial separation of Sb and N atoms avoids the ubiquitous growth problems and improves crystal quality. Moreover, these new structures allow for additional control of the effective bandgap through the period thickness and provide a type-II band alignment with long carrier lifetimes. All this leads to a strong enhancement of the external quantum efficiency under photovoltaic conditions with respect to bulk layers of equivalent thickness. Our results show that GaAsSb/GaAsN superlattices with short periods are the ideal (pseudo)material to be integrated in new GaAs/Ge-based multi-junction solar cells that could approach the theoretical efficiency limit.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Gonzalo A,Utrilla AD,Reyes DF,Braza V,Llorens JM,Fuertes Marrón D,Alén B,Ben T,González D,Guzman A,Hierro A,Ulloa JMdoi
10.1038/s41598-017-04321-4subject
Has Abstractpub_date
2017-06-21 00:00:00pages
4012issue
1issn
2045-2322pii
10.1038/s41598-017-04321-4journal_volume
7pub_type
杂志文章abstract：:Hemodialysis patients are a special group of patients with higher mortality rates. Hemodialysis patients with vitamin D deficiency {plasma levels of 25-hydroxyvitamin D [25(OH)D] below 20 ng/mL} are associated with even higher mortality rates. The prognostic importance of vitamin D deficiency in hemodialysis patients ...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-020-64359-9
更新日期：2020-05-05 00:00:00
abstract：:A primary cilium is a hair-like structure with a width of approximately 200 nm. Over the past few decades, the main challenge in the study of the ultrastructure of cilia has been the high sensitivity of cilia to chemical fixation, which is required for many imaging techniques. In this report, we demonstrate a combined...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/srep15982
更新日期：2015-11-02 00:00:00
abstract：:Self-assembly of biological molecules on solid materials is central to the "bottom-up" approach to directly integrate biology with electronics. Inspired by biology, exquisite biomolecular nanoarchitectures have been formed on solid surfaces. We demonstrate that a combinatorially-selected dodecapeptide and its variants...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/srep33778
更新日期：2016-09-22 00:00:00
abstract：:Broadband acoustic absorbers with thin thickness are highly desired in practical situations such as architectural acoustics, yet it is still challenging to achieve high absorption by using structure with limited thickness. Here we report the theoretical optimal design, numerical simulation and experimental demonstrati...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-020-67688-x
更新日期：2020-07-01 00:00:00
abstract：:This study was conducted to identify risk factors associated with AIV infections in live bird retail stalls (LBRS) in Lahore District, Pakistan. A cross-sectional survey of LBRS was conducted from December 2009-February 2010 using two-stage cluster sampling based on probability proportional to size. A total of 280 oro...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-018-23895-1
更新日期：2018-04-04 00:00:00
abstract：:(1) Objective: Greenhouse workers are considered a special occupational group who are exposed to more toxic and harmful substances than ordinary farmers. The health problem of this group is a public health problem that warrants attention. Taking greenhouse workers in Ningxia, China, as the research sample, this study ...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-020-65662-1
更新日期：2020-05-26 00:00:00
abstract：:Accurate species identification is fundamental when recording ecological data. However, the ability to correctly identify organisms visually is rarely questioned. We investigated how experts and non-experts compared in the identification of bumblebees, a group of insects of considerable conservation concern. Experts a...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/srep33634
更新日期：2016-09-20 00:00:00
abstract：:How exponentially growing cells maintain size homeostasis is an important fundamental problem. Recent single-cell studies in prokaryotes have uncovered the adder principle, where cells add a fixed size (volume) from birth to division, irrespective of their size at birth. To mechanistically explain the adder principle,...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/srep30229
更新日期：2016-07-26 00:00:00
abstract：:Efficient inactivation of Escherichia coli (E. coli) under visible (532 nm) pulsed light irradiation was achieved by fusion of a visible light-absorbing dye with E. coli. Inactivation experiments showed that 3-log inactivation of E. coli was obtained within 20 min under a 50 kJ/cm2 dose. This treatment time and dose m...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-020-74714-5
更新日期：2020-10-20 00:00:00
abstract：:Recently, amorphous Hf-B-Si-C-N coatings found to demonstrate superior high-temperature oxidation resistance. The microstructure evolution of two coatings, Hf7B23Si22C6N40 and Hf6B21Si19C4N47, annealed to 1500 °C in air is investigated to understand their high oxidation resistance. The annealed coatings develop a two-...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-019-40428-6
更新日期：2019-03-05 00:00:00
abstract：:CDK5 Regulatory Subunit-Associated Protein 1-like 1 (CDKAL1) was identified as a susceptibility gene for type 2 diabetes and body mass index in genome-wide association studies. Although it was reported that CDKAL1 is a methylthiotransferase essential for tRNALys(UUU) and faithful translation of proinsulin generated in...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-017-06469-5
更新日期：2017-08-04 00:00:00
abstract：:Protein degradation is an essential mechanism for maintaining proteostasis in response to internal and external perturbations. Disruption of this process is implicated in many human diseases. We present a new technique, QUAD (Quantification of Azidohomoalanine Degradation), to analyze the global degradation rates in t...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-020-72410-y
更新日期：2020-09-29 00:00:00
abstract：:Proton irradiation is often used as a proxy for neutron irradiation but the irradiated layer is typically <50 μm deep; this presents a problem when trying to obtain mechanical test data as a function of irradiation level. Two novel methodologies have been developed to record stress-strain curves for thin proton-irradi...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-020-62241-2
更新日期：2020-03-24 00:00:00
abstract：:This study investigated the effect of various prebiotics (indigestible dextrin, α-cyclodextrin, and dextran) on human colonic microbiota at a dosage corresponding to a daily intake of 6 g of prebiotics per person (0.2% of dietary intake). We used an in vitro human colonic microbiota model based on batch fermentation s...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-017-18877-8
更新日期：2018-01-11 00:00:00
abstract：:The non-invasive high-resolution spatial mapping of cell metabolism within tissues could provide substantial advancements in assessing the efficacy of stem cell therapy and understanding tissue development. Here, using two-photon excited fluorescence microscopy, we elucidate the relationships among endogenous cell flu...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/srep03432
更新日期：2013-12-05 00:00:00
abstract：:Cardiac magnetic resonance (CMR) has emerged as a powerful tool for in vivo assessments of cardiac parameters in experimental animal models of cardiovascular diseases, but its reproducibility in this setting remains poorly explored. To address this issue, we investigated the test-retest reproducibility of preclinical ...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-017-07083-1
更新日期：2017-07-27 00:00:00
abstract：:While much of memory research takes an observer-centric focus looking at participant performance, recent work has pinpointed important item-centric effects on memory, or how intrinsically memorable a given stimulus is. However, little is known about the neural correlates of memorability during memory retrieval, or how...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-018-26467-5
更新日期：2018-06-06 00:00:00
abstract：:A theoretical investigation of the unique electronic transport properties of the junctions composed of boron nitride atomic chains bridging symmetric graphene electrodes with point-contacts is executed through non-equilibrium Green's function technique in combination with density functional theory. Compared with carbo...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/srep26389
更新日期：2016-05-23 00:00:00
abstract：:An amendment to this paper has been published and can be accessed via a link at the top of the paper. ...
journal_title：Scientific reports
pub_type： 已发布勘误
doi：10.1038/s41598-020-58618-y
更新日期：2020-01-28 00:00:00
abstract：:We found that the coagulation and cytokine pathways were important mechanisms involve in the degeneration of intervertebral discs (IVD) using a microarray approach to analyze gene expression in different grades of specimens. Furthermore, using a cytokine/chemokine array, a significant increase in CXCL8 expression was ...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-017-09122-3
更新日期：2017-08-17 00:00:00
abstract：:Administration of dibutyl phthalate (DBP) to pregnant rats causes reproductive disorders in male offspring, resulting from suppression of intratesticular testosterone, and is used as a model for human testicular dysgenesis syndrome (TDS). DBP exposure in pregnancy induces focal dysgenetic areas in fetal testes that ap...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-017-02684-2
更新日期：2017-05-31 00:00:00
abstract：:Aim of this retrospective analysis was to evaluate the survival times after percutaneous irreversible electroporation (IRE) in inoperable liver tumors not amenable to thermal ablation. 71 patients (14 females, 57 males, median age 63.5 ± 10.8 years) with 103 liver tumors were treated in 83 interventions using IRE (Nan...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/srep43687
更新日期：2017-03-07 00:00:00
abstract：:Epilepsy, that comprises a wide spectrum of neuronal disorders and accounts for about one percent of global disease burden affecting people of all age groups, is recognised as apasmara in the traditional medicinal system of Indian antiquity commonly known as Ayurveda. Towards exploring the molecular level complex regu...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-019-46715-6
更新日期：2019-07-22 00:00:00
abstract：:The topical application of lactic acid bacteria (LAB) is recognized as a useful approach to improve skin health. This work aims to characterize by a multidisciplinary approach, the wound healing, anti-inflammatory, anti-pathogens and proteomic effects of six LAB lysates, belonging to the genus Lactobacillus. Our resul...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-020-68483-4
更新日期：2020-07-14 00:00:00
abstract：:Night-workers, transcontinental travelers and individuals that regularly shift their sleep timing, suffer from circadian desynchrony and are at risk to develop metabolic disease, cancer, and mood disorders, among others. Experimental and clinical studies provide evidence that food intake restricted to the normal activ...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-020-63227-w
更新日期：2020-04-10 00:00:00
abstract：:Rice (Oryza sativa L.) is one of the essential staple food crops and tillering, panicle branching and grain filling are three important traits determining the grain yield. Although miRNAs have been reported being regulating yield, no study has systematically investigated how miRNAs differentially function in high and ...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-018-26438-w
更新日期：2018-05-31 00:00:00
abstract：:The moist savanna zone covers 0.5 × 106 km2 in West Africa and is characterized by very low soil N levels limiting primary production, but the ecology of nitrifiers in these (agro)ecosystems is largely unknown. We compared the effects of six agricultural practices on nitrifier activity, abundance and diversity at nine...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-017-10185-5
更新日期：2017-08-31 00:00:00
abstract：:We fabricate a nonlinear optical device based on a fiber pigtail cross-section coated with a single-layer graphene grown by chemical vapor deposition (CVD) method. Using the fabricated graphene-assisted nonlinear optical device and employing Nyquist 16-ary quadrature amplitude modulation (16-QAM) signal, we experiment...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/srep22379
更新日期：2016-03-02 00:00:00
abstract：:Survivors of Ebola virus infection may become subclinically infected, but whether animal models recapitulate this complication is unclear. Using histology in combination with immunohistochemistry and in situ hybridization in a retrospective review of a guinea pig confirmation-of-virulence study, we demonstrate for the...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-018-19638-x
更新日期：2018-01-19 00:00:00
abstract：:Sunitinib (ST), a multitargeted receptor tyrosine kinase inhibitor, has been demonstrated to be effective for the treatment of renal carcinoma. It has been reported that ST is involved in the mediation of autophagy; however, its regulatory role in the autophagic process remains controversial. Furthermore, the mechanis...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-019-47597-4
更新日期：2019-07-31 00:00:00
