Ligand-free rutile and anatase TiO₂nanocrystals were synthesized<italic>via</italic>a hydrolytic sol–gel method. The improved power conversion efficiency was achieved by using as electron extraction layer in the organic solar cells.

A photocatalytic strategy has been developed to synthesize colloidal Ag-TiO2 nanorod composites in which each TiO2 contains a single Ag nanoparticle on its surface. In this rational synthesis, photoexcitation of nanorods under UV illumination produces electrons that reduce Ag(I) precursor and deposit multiple small nanoparticles the surface nanorods. Prolonged irradiation induces an interesting ripening process, dissolves smaller by photogenerated oxidative species then redeposits onto one...

Photodetectors based on three dimensional organic-inorganic lead halide perovskites have recently received significant attention. As a new type of light-harvesting materials, formamidinium iodide (FAPbI3) is known to possess excellent optoelectronic properties even exceeding those methylammonium (MAPbI3). To date, only few photoconductor-type photodetectors FAPbI3 single crystals and polycrystalline thin films in lateral structure been reported. Here, we demonstrate low-voltage,...

Abstract The performance of perovskite solar cells is greatly affected by the crystallization active layer. Perovskite crystal grains should neatly arrange and penetrate entire layer for an ideal crystallization. These kinds crystallized films exhibit fewer defects longer carrier lifetime, which beneficial to enhance cells. Here, testing residual charge with different conditions, it demonstrated that exists widely at grain boundary, parallel device, related Single arranged can generate less...

Abstract The quality of perovskite films plays a fundamental role in determining the performance solar cells (PSCs). It is widely recognized that achieving high crystalline and minimizing defect density are essential. In this study, utilization multifunctional additive 5‐ammonium acid (5‐AVA) to improve morphology proposed. ‐NH 2 ‐COOH groups 5‐AVA enable effective coordination with Pb ions organic perovskite, resulting suppression formation reduction non‐radiative recombination losses....

Abstract Multifunctional organic photodetectors (MFOPDs) have garnered significant attention due to their remarkable potential for integrating diverse device functionalities. In contrast previous MFOPDs that primarily emphasized the integration of various response bands, a pioneering multifunctional photodetector is introduced based on P3HT:PC 61 BM system capable selectively responding both wavelength and polarization. Under positive bias, operates in wide‐band, polarization‐insensitive...

This study reported a novel fluorinated copolymer (FTQ) and shown it to exhibit significantly higher open circuit voltage (VOC) in bulk heterojunction solar cells with [6,6]-phenyl-C71-butyric acid methyl ester (PC71BM) compared the low band-gap polymer Thiophene–Quinoxaline (TQ). Fluorination lowers HOMO level effectively which pushes down highest occupied molecular orbital (HOMO) of TQ from −5.36 eV −5.51 increases relative dielectric constant 4.2 5.5, resulting high VOC. The VOC 950 mV...

Copper(I) sulfide (Cu2S) nanodisks with controllable size and aspect ratio have been synthesized by using a one-pot colloidal process, in which no pre-prepared organometallic precursors are required. The reaction involves the injection of dodecanethiol into hot solution containing copper salt, surfactants, high boiling-point organic solvent. Copper thiolate forms at beginning effectively acts as precursor whose decomposition leads to further nucleation growth Cu2S nanocrystals. nanocrystals...

A simple one-pot method is developed to prepare size- and shape-controlled copper(I) sulfide (Cu2S) nanocrystals by thermolysis of a mixed solution copper acetylacetonate, dodecanethiol oleylamine at relatively high temperature. The crystal structure, chemical composition morphology the as-obtained products are characterized powder x-ray diffraction (PXRD), photoelectron spectroscopy (XPS), Auger electron (AES), transmission microscopy (TEM) scanning (SEM). size Cu2S can be easily controlled...

Abstract Graphene field effect transistor sensitized by a layer of semiconductor (sensitizer/GFET) is device structure that investigated extensively for ultrasensitive photodetection. Among others, organometallic perovskite sensitizer has the advantages long carrier lifetime and solution processable. A further step to improve responsivity design can promote electron–hole separation selective trapping in sensitizer. Here, use hybrid perovskite–organic bulk heterojunction (BHJ) as light...

The single BDA 2+ layer in D–J BDASnI 4 eliminates the van der Waals gap R–P perovskites, enhancing out-of-plane charge transport and structural stability. Polymer-gated FETs show improved performance environmental

The strong Lewis acid tin halide leads to an excessively fast crystallization rate, resulting in more defects the film and degraded device performance. In this work, a cesium acetate (CsAc) pre-buried poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) hole transport layer acts as nucleation points during of tin-based perovskite, which can induce preferential orientation growth crystals increase grain size improve quality crystallization. addition CsAc not only conductivity...

An optical broadband terahertz (THz) wave modulator, based on a polymer-inorganic interface, is investigated. The THz pulse transmission was efficiently modulated by an external continuous (CW) laser. effects the poly[2-methoxy-5-(2'-ethylhexyloxy)-1, 4-phenylenevinylene] (MEH-PPV)/silicon interface were measured time-domain spectroscopy. modulation factor reached 99.6%, at laser beam intensity of 6.3 W/cm2. In proposed THz-CW system, significant fall (in both and reflection) also observed...

Most organic photodetectors utilize a bulk heterojunction (BHJ) photo-active film due to its high exciton dissociation efficiency. However, the low dark current density, key role in determining overall performance of photodetectors, is hardly achieved BHJ structure since both donor and acceptor domains are contact with same electrode. The most popular strategy overcome this problem by fabricating bilayer or multilayer devices. complicated fabrication process challenge for printing...

High-performance bottom-gate 2D-layered (PEA)₂SnI₄ field-effect transistors have been fabricated using PVA/CL-PVP as gate dielectric layers.

An active all-optical high-efficiency broadband terahertz device based on an organometal halide perovskite (CH3NH3PbI3, MAPbI3)/inorganic (Si) structure is investigated. Spectrally modulation of the THz transmission obtained in frequency range from 0.2 to 2.6 THz, and a depth nearly 100% can be achieved with low-level photoexcitation power (∼0.4 W/cm2). Both reflection were suppressed MAPbI3/Si by external continuous-wave (CW) laser. Enhancement charge carrier density at interface crucial...

We report a high efficiency, broadband terahertz (THz) modulator following study of phthalocyanine-compound organic films irradiated with an external excitation laser. Both transmission and reflection modulations each organic/silicon bilayers were measured using THz time-domain continuous-wave systems. For very low intensities, the experimental results show that AlClPc/Si can achieve modulation factor for reflection, indicating has superior efficiency compared other (CuPc SnCl2Pc). In...

Abstract Metal coordination bonds can be coordinated to specific functional groups in polymers. This special give the material excellent self‐healing and mechanical properties. Nitrile rubber (XNBR)/CuCl 2 composites were prepared by solid‐state blending. By changing reaction temperature, different formed between nitrile copper ions. The starting temperature of was determined 100°C observing changes curve. With increase from 190°C, ions' oxidation state raised 3, while part C ≡ N transformed...

The balance between ion implantation and carrier transport is a critical factor in achieving high-performance polymer electrochemical transistors (PECTs). While the crystallinity of films typically enhances charge transport...

ABSTRACT Thermoplastic vulcanized rubber (TPV) result in intermaterial incompatibility due to the thermodynamic of components that make up their soft and hard segments, which results significant low‐temperature brittleness poor mechanical properties material. And thermoplastic elastomers, especially based on ethylene propylene monomer/polypropylene (EPDM/PP) corresponding mechanism action have not been elucidated. The balance between low temperature performance is a real challenge for TPV....

Although all inorganic metal halide perovskite quantum dots (QDs) have shown great potential in photodetectors, many reported devices still suffer from low responsivity due to poor mobility and high defect densities. To overcome these challenges, heterojunction structures that separate electron hole pathways emerged as a promising approach improve the by reducing radiative recombination. Two-dimensional materials such graphene MoS2 been integrated with perovskites enhance performance;...