Abstract Self‐powered broadband photodetectors exhibit excellent self‐powered and wide‐band photoresponse from visible to infrared region attract enormous attention due their promising applications in imaging, sensing, optical communication. PbSe colloidal quantum dots (CQDs) halide perovskites nanocrystals (NCs) are commonly used for strong absorption capability, tunable bandgap, high aspect ratio. However, suffering low charge carrier mobility trap density, the performance of individual...

Heterojunctions based on low dimensional semiconducting materials are one of the most promising alternatives for next-generation optoelectronic devices. By choosing different dopants in high-quality nanomaterials, p-n junctions can be realized with tailored energy band alignments. Also, bulk-heterojunctions (BHJs) photodetectors have shown high detectivity because suppressed dark current and photocurrent, which due to larger built-in electric potential within depletion region significantly...

The article explores the enhanced performance of photodetectors based on nanocomposites CsPbI 3 nanorods and PbSe QDs by studying their impact charge carrier dynamics optoelectronic properties, thus to understand underlain mechanism.

With its properties of bandgap tunability, low cost, and substrate compatibility, colloidal quantum dots (CQDs) are becoming promising materials for optoelectronic applications. Additionally, solution-processed organic, inorganic, hybrid ligand-exchange technologies have been widely used in PbS CQDs solar cells, currently the maximum certified power conversion efficiency 9.9% has reported by passivation treatment molecular iodine. Presently, there still some challenges, basic physical...

Currently, colloidal quantum dots (CQDs)-based photodetectors are widely investigated due to their low cost and easy integration with optoelectronic devices. The requirements for a high-performance photodetector dark current high photocurrent. Normally, also possess photocurrent, or reduced resulting in detectivity. In this paper, solution suppress maintain i.e., use of poly(methyl methacrylate) doped Au nanoparticles (NPs) (i.e., PMMA:Au) as an interlayer enhanced-performance tandem...

All-inorganic lead halide perovskites and quantum dots (QDs) have gained significant attention since their emergence, owing to immense potential for applications in optoelectronic devices. Here, enhanced-performance broadband photodetectors based on the bulk-heterostructure of a CsPbBr

Abstract All‐inorganic lead halide perovskites with good surface morphology show substantial prospect for optoelectronic devices. However, the anion exchange of coordinated alkylamine ligands (e.g., oleic acid and oleylamine) can detach induce more interface trap sites, subsequently to reduce device performance. In this paper, therefore, a simple solution‐processed route is presented synthesize quasi coreshell CsPbBr 3 formamidinium iodide (FAI = CH(NH 2 ) I) colloidal quantum dots (CQDs),...

Abstract In general, the fabrication of high‐performance, self‐powered broadband photodetectors based on traditional semiconducting thin films is tedious and costly. Here, in this paper a solution‐processed, CH 3 NH PbI (MAPbI ) nanocrystal photodetector ITO/MAPbI /Ag presented, it shows photoresponse from visible to near‐infrared wavelength region. The pronounced enhanced performance due taking advantage built‐in electric field induced by work function difference two electrodes. optimized...

Abstract All‐inorganic halide perovskites have recently emerged as a promising candidate for new‐generation optoelectronics. The device performance of solution‐processed photodetectors critically depends on the surface morphology and film features, however, behind mechanism is not clear till now. In this paper, feasible method surface‐passivating all‐inorganic with poly(3‐hexylthiophene) (P3HT) photoactive layer field‐effect transistor (FET)‐based presented, underlying mechanisms to enhance...

Abstract The emerging flexible device technologies have fascinated the modern optoelectronic industry owing to their invincible properties such as wearable, stretchable, smart, energy‐efficient, scalability, cost‐effective, and high performance. However, there is still room for improvements performance, reliability, mass production. This research work fabricates laser‐induced graphene (LIG) interdigitated electrodes based on UV photodetectors over polyimide substrate, using...

Abstract The detection of different types concept drift has wide applications in the fields cloud computing and security information detection. Concept can indeed assist promptly identifying instances where model performance deteriorates or when there are changes data distribution. This paper focuses on problem order to conduct frequent pattern mining. To address limitation fixed sliding windows adapting evolving streams, we propose a variable window mining algorithm, which dynamically...

High-performance, self-driven broadband photodetectors on flexible silicon nanowires (Si-NWs) substrate, in which Si-NWs are covered with reduced graphene oxide to form heterojunctions, presented.

Narrow band-gap colloidal quantum dots (CQDs) are promising materials for flexible electronic, such as infrared light photodetectors and solar cells.

The poor stability of CsPbX₃ quantum dots (QDs-CsPbX₃) under wet conditions is still considered to be a key issue. In order overcome this problem, study presents high molecular weight polymer matrix (polymethylmethacrylate, PMMA) incorporated into the QDs-CsPbBr₃ improve its and maintain excellent optical properties. study, Cs₂CO₃, PbO, Tetrabutylammonium Bromide (TOAB) powder, oleic acid, toluene solvent were uniformly mixed purified prepare high-quality QDs powders. Then, hexane was used...

In the past few decades, great attention has been paid to development of IV-VI semiconductor colloidal quantum dots, such as PbSe, PbS and PbSSe, in infrared (IR) photodetectors due their high photosensitivity, solution-processing low cost fabrication. IR based on field-effect transistors (FETs) showed detectivity since transconductance can magnify drain-source current under certain applied gate voltages. However, traditional lateral FETs usually suffer from photosensitivity slow...

High performance solution-processed infrared photodiodes ITO/ZnO/PbS_xSe_1−x/Au, in which ternary PbS_xSe_1−x colloidal quantum dots acts as the active layer and ZnO interlayer electron-transporting layer, have been demonstrated.

Recently, great attention has been paid to IV–VI colloidal quantum dots (CQDs) for their high photosensitivity, solution processability and low cost. Also, metal halide perovskites are very promising materials realize the high-performance solution-processed visible-light photodetectors due cost-effective manufacturing, tunable absorption photoluminescence in whole visible spectrum. In this paper, we present CQDs-based tandem broadband with dark-current high-sensitivity by inserting...

Bright visible photoluminescence was observed from nanotube titania (or dehydrated titanic acid) prepared by a soft chemical process. Its comes the Ti−OH complex within tubular structure. With improvement of crystalline structure and desorption physically adsorbed water on inner outer surfaces annealing below 662 K, intensity is enhanced. However, decreases dramatically if destroyed at higher temperature, simultaneously bonds are broken. Therefore, one-dimensional very important factor for...