A solution processed MoO3/PEDOT:PSS bilayer structure is used as the hole transporting layer to improve efficiency and stability of planar heterojunction perovskite solar cells. Increased extraction restrained erosion ITO by PSS are demonstrated in optimized device due incorporation an MoO3 layer.

Inorganic semiconductor-based photodetectors have been suffering from slow response speeds, which are caused by the persistent photoconductivity of semiconductor materials. For realizing high speed optoelectronic devices, organometal halide perovskite thin films were applied onto interdigitated (IDT) patterned Au electrodes, and symmetrical structured photoconductive detectors achieved. The sensitive to incident light signals, photocurrents devices 2–3 orders magnitude higher than dark...

Salient object detection (SOD) in optical remote sense images (ORSIs) is a valuable and challenging task. The factors ORSI, such as background clutter, lighting shadows, imaging blur, low resolution, significantly degrade the completeness accuracy of salient objects. To handle this problem, we propose novel model to learn robust multiscale region features objects by simultaneously optimizing their boundaries. First, extract through hierarchical attention module. Second, generate boundary...

The synthesis and upconversion luminescence properties upon a 980 nm pump of cubic Lu1.88Yb0.1Er0.02O3 nanocrystals with various shapes, e.g., nanorods, nanosheets, nanoparticles, are studied. It is observed that decreasing size the nanocrystals, relative intensity upconverted red emission (Er3+: 4F9/2 → 4I15/2) to green one (2H11/2, 4S3/2) increased, three-photon process involved in upconversion, as described by (Er) + 2F5/2 (Yb) 2H9/2 2F7/2 (Yb), synchronously enhanced. An analysis based...

ZnWO4:Eu3+ nanocrystals were prepared by the hydrothermal method at various temperatures and pH values. Their luminescent properties including excitation emission processes, dynamics, local environments surrounding Eu3+ ions systemically studied. The results indicate that particle size of grows with increasing temperature, while it rarely changes value. bands for Eu3+, which are contributed different components, shift considerably to blue relative intensity blue-green caused tungstate groups...

An ultraviolet photodetector was fabricated on MgZnO thin film grown by metal-organic chemical vapor deposition. The peak response of the device centers at 238 nm and cutoff wavelength is 253 nm. responsivity 129 mA/W 15 V bias, UV/visible reject ratio 4 orders magnitude. Internal gain due to hole trapping interface that brings low speed. Native defects Au/MgZnO degrade barrier effect, which caused large dark current high visible response.

Recent investigations indicate that the performance of organic-inorganic perovskite optoelectronic devices can be improved by combining perovskites and inorganic materials. However, very few studies have focused on investigation perovskites/inorganic semiconductor hybrid UV photodetectors their detailed performance-enhancement mechanism is still not clear. In this work, a CH3NH3PbCl3/ZnO photodetector has been first demonstrated investigated. Both photoresponsivity response speed device are...

Abstract Nowadays, the conflict between supply and demand of water resources in many regions is becoming increasingly prominent. Scientific allocation regional has become key to solving contradiction. In this study, a multi-objective optimization model considering social, economic, ecological objectives established, four improvement spots are introduced sparrow search algorithm (SSA) form an improved (ISSA). By testing nine benchmark functions including monotonic multi-peaked, efficiency...

The upconversion (UC) enhancement with size decrease has been realized through Y3+ ions doping in β-NaLuF4:Yb3+/Er3+ nanocrystals (NCs) by a solvothermal process. X-Ray diffraction (XRD), scanning electron microscopy (SEM) and UC luminescence spectra were used to characterize the resulting samples. With an increase of concentration, NCs is continuously decreased no phase transition. Meanwhile, intensity firstly increased then it decreases when concentration over 30 mol%....

Cu2ZnSn(S,Se)4 (CZTSSe) thin-film solar cells have been encountering a bottleneck period since the champion power conversion efficiency (PCE) of 12.7% was achieved by Kim et al. in 2014. One critical factors that impede its further development is relatively low open-circuit voltage (VOC) caused serious interface carrier recombination. In this regard, back surface field (BSF) employment feasible strategy to address VOC issue CZTSSe some extent. Here, we demonstrated self-organized BSF...

Many previous researchers have converted background knowledge as constraints to obtain accurate clustering. These clustering methods are usually called constrained Previous ordering instance level non-hierarchical constraints, like must-link and cannot-link which do not provide hierarchical information. In order incorporate the into agglomerative clustering, we extend instance-level constraint in this paper. We name it constraint. Ordering can be used capture side information they allow user...

Abstract In this work, we describe the performance of organic Schottky barrier solar cells with structure ITO/molybdenum oxide (MoOx)/boron subphthalocyanine chloride (SubPc)/bathophenanthroline (BPhen)/Al. The SubPc-based exhibited a short-circuit current density (Jsc) 2.59 mA/cm 2 , an open-circuit voltage (Voc) 1.06 V, and power conversion efficiency (PCE) 0.82% under simulated AM1.5 G illumination at 100 mW/cm . Device was substantially enhanced by simply inserting thin hole transport...

Nanosized Yb(3+) and Er(3+) co-doped β-NaYF4 cores coated with multiple shell layers were synthesized by a solvothermal process. X-ray diffraction scanning electron microscopy used to characterize the crystal structure morphology of materials. The visible near-infrared spectra as well decay curves also measured. A 40-fold intensity increase for green upconversion 34-fold red observed are three layers. origin enhancement was studied on basis photoluminescence times. Our results indicate that...

In this paper, we tackle the problem of ground-view panorama image generation conditioning on top-view aerial image, which is a challenging due to large gap between domains associated with different view-points. Instead learning underlying cross-view mapping by feedforward network as previous methods, propose novel adversarial feedback GAN framework named PanoGAN consisting two key components: an module and dual branch discrimination strategy. First, fed into generator produce segmentation...

The three-dimensionally ordered macroporous (3DOM) ZrO2: Er(3+), Yb(3+) materials were successfully synthesized by the sol-gel method combined with a polystyrene latex sphere templating technique, and their morphologies, surface physicochemical properties, upconversion photoluminescence (UC-PL) properties studied. results indicate that exhibited both porosity strong UC-PL under excitation of 978 nm diode laser. In comparison nonporous samples, relative intensity red ((4)F(9/2)-(4)I(15/2)) to...

Hexagonal LaF3 nanoplates have been successfully prepared via a polyol-mediated route with ethylene glycol (EG) as solvent. NaNO3, which was introduced into the reaction system mineralizer, played an important role in formation process of these nanoplates. The size as-prepared could be tuned by changing NaNO3 content and NH4F content. A possible mechanism has proposed. effects other alkali metal nitrates (LiNO3, KNO3, RbNO3 CsNO3) solvents (water, methanol, diethylene glycol, glycerol) on...

An underlying assumption in bearing fault diagnosis is that the training data from a source domain and test target obey same distribution. But this can be easily violated practical industrial environments due to shift, which leads significant performance degradation. To overcome issue, we propose novel convolutional neural network model identify cross-domain types based on 1-D vibration signals. Different current single-network-based approaches, our comprises student teacher simultaneously...

In the sign language fingerspelling scheme, letters in alphabet are presented by a distinctive finger shape or movement. The work is conducted for autokinetic translating signs to text. A recognition framework using intensity and depth information proposed compared with some distinguished works. Histogram of Oriented Gradients (HOG) Zernike moments used as discriminative features due their simplicity good performance. Deep Belief Network (DBN) composed three Restricted Boltzmann Machines...