Hybrid organic-inorganic perovskites (HOIPs) exhibit long electronic carrier diffusion length, high optical absorption coefficient, and impressive photovoltaic device performance. At the core of any optoelectronic lie charge transport properties, especially microscopic mechanism scattering, which must efficiently affect function. In this work, CH3NH3PbI3 (MAPbI3) films were fabricated by a vapor solution reaction method. Temperature-dependent Hall measurements introduced to investigate...

MicroRNA-29b (miR-29b) is a member of the miR-29 family, which targets DNA methyltransferases (DNMTs) and ten eleven translocation enzymes (TETs), thereby regulating methylation. However, role miR-29b in porcine early embryo development has not been reported. In this study, we examined effects vitro fertilization (IVF) embryos to investigate mechanism by regulated The interference its special miRNA inhibitor significantly up-regulated Dnmt3a/b Tet1 but downregulated Tet2/3; meanwhile it...

Periodically nanopatterned Si structures have been prepared by using a nanosphere lithography technique. The formed exhibit good anti‐reflection and enhanced optical absorption characteristics. mean surface reflectance weighted AM1.5 solar spectrum (300–1200 nm) is as low 5%. By depositing quantum dot/SiO 2 multilayers (MLs) on the substrate, higher than 90%, which significantly improved compared with same deposited flat substrate. Furthermore, prototype n‐Si/Si MLs/p‐Si heterojunction cells...

The type and pattern of epigenetic modification in donor cells can significantly affect the developmental competency somatic cell nuclear transfer (SCNT) embryos. Here, we investigated capacity, gene expression, modifications SCNT embryos derived from porcine bone marrow‐derived mesenchymal stem (BMSCs) fetal fibroblasts (FFs) compared to obtained vitro fertilization (IVF). Compared FFs, BMSCs had more active markers (Histone H3 modifications: H3K9Ac, H3K4me3, H3K4me2) fewer repressive...

We propose a novel structure of graded-sized Si QDs/Si hetero-junction cell, which exhibits broadband spectral response and improved cell performance.

Over the past couple of decades, extensive research has been conducted on silicon (Si) based solar cells, whose power conversion efficiency (PCE) still limitations because a mismatched spectrum. Recently, down-shifting effect provided new way to improve cell performances by converting ultraviolet (UV) photons visible light. In this work, caesium lead bromide perovskite quantum dots (CsPbBr3 QDs) are synthesized with uniform size 10 nm. Exhibiting strong absorption near UV light and intense...

Si quantum dots (Si QDs)/SiC multilayers were fabricated by annealing hydrogenated amorphous Si/SiC prepared in a plasma-enhanced chemical vapor deposition system. The thickness of layer was designed to be 4 nm, and the SiC kept at 2 nm. Transmission electron microscopy observation revealed formation QDs after 900°C annealing. optical properties QDs/SiC studied, band gap deduced from absorption coefficient result is 1.48 eV. Moreover, p-i-n structure with n-a-Si/i-(Si multilayers)/p-Si...

We report herein on the effects of silicon nanowire with different morphology device performance n-SiNW/PEDOT:PSS hybrid solar cells. The power conversion efficiency (PCE) and external quantum (EQE) SiNW/PEDOT:PSS cells can be optimized by varying length nanowires. optimal nanowires is 0.23 μm, cell has V oc 569 mV, J sc 30.1 mA/cm(2), PCE 9.3 %. fabricated more isolated diluted etching solution. And a significant enhancement, from to 33.2 mA/cm(2). remarkable EQE in wavelength region 300...

Vertically aligned quasi two-dimensional (2D) ZnO nanorods (NRs) on carbon fiber paper were prepared by a modified hydrothermal approach, an individual nanorod has diameter of 100–200 nm and length ~1 µm. ZnO/ZnS core-hell hierarchal structures with outer ZnS shell ~25 fabricated under elaborate sulfidation treatment. Compared to NRs depressed near band emission at 380 significant enhanced visible light around 500 observed for the from photoluminescence spectra. XPS ESR measurements carried...

Si nanowires (Si NWs) structures with good antireflection and enhanced optical‐absorption properties are used to fabricate quantum dots/Si NWs heterojunction solar cells. The prepared by the metal‐assisted chemical‐etching technique exhibit a very low reflection in wide spectral range (300–1200 nm). Correspondingly, optical absorption reaches as high 88.9% weighting AM1.5G spectrum. Both short current density open voltage improved compared reference flat cell. However, photovoltaic degraded...

Recently, extensive studies have focused on exploring a variety of silicon (Si) nanostructures among which Si quantum dots (Si QDs) may be applied in all tandem solar cells (TSCs) for the time to come. By virtue its size tunability, optical bandgap QDs is capable matching spectra broad range and thus improving spectral response. In present work, size-controllable are successfully obtained through formation QDs/SiC multilayers (MLs). According absorption measurement, MLs shows red shift...

We deposited a p-i-n structure device with alternative amorphous Si (a-Si) and SiC (a-SiC) multilayers as an intrinsic layer in plasma-enhanced chemical vapor deposition (PECVD) system. A KrF pulsed excimer laser-induced crystallization of a-Si/a-SiC stacked structures was used to prepare quantum dots (Si QDs)/SiC multilayers. The formation QDs average size 4 nm confirmed by Raman spectra, whereas the layered were revealed cross-sectional transmission electron microscopy. Electroluminescence...

Microscopic charge injection into the SiC/Si nanocrystals/SiC sandwiched structures through a biased conductive AFM tip is subsequently characterized by both electrostatic force microscopy and Kelvin probe (KPFM). The retention characteristics are found to be affected not only band offset at Si interface but also doping type of substrate. On other hand, capacitance–voltage (C–V) measurements investigate macroscopic charging effect with thicker SiC capping layer, where charges injected from...

A dielectric anomaly induced by doping has been observed at about 340 K in chlorine-doped diisopropylammonium bromide. The a switchable behaviour, which indicates potential applications on switches and sensors. Temperature-dependent Raman spectrum, X-ray diffraction differential scanning calorimetry do not show any around the temperature, prove that does come from structure phase transition no specific heat variety. It is assumed this can be attributed to freezing of ferroelectric domain...

A robust radial junction (RJ) structure directly constructed upon the surface of a flexible Al foil substrate shows promising potential to boost wearable and portable applications, where silicon nanowire (SiNW) supported multilayer has proven beneficial in excellent mechanical stability sufficient light harvesting. Assigned backreflection contributed by foil, much larger current can be achieved than that on glass. While comprehensive understanding absorption under remains mainly unexplored....