Hybrid inorganic-organic light-emitting heterostructure devices based on ZnO

Rezaie, Mahdiyar Nouri; Mohammadnejad, Shahram; Ahadzadeh, Shabnam

doi:10.1016/j.optlastec.2020.106896

Cited by 18 publications

(8 citation statements)

References 258 publications

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“…10,11 Besides, oxide-derived metal-based materials such as CuO, Cu 2 O, 12−15 Ag 2 O, 16,17 NiO, 18,19 and TiO 2 20−22 have been successfully demonstrated to be active and selective catalysts for CO 2 reduction. ZnO, a low toxic compound, is an oxide-derived non-noble metal with promising optical, 23 electronic, 24 photovoltaic, 25−27 and catalytic properties. 28−31 Recently, a maximum faradaic efficiency (FE) of 92% for CO 2 to CO conversion has been reported for a nanoporous (NP) ZnO.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Currently, a variety of earth-abundant metal-based molecular catalysts have been identified, reporting high selectivity for the CO 2 reduction reaction. ,− Among examples, cobalt phthalocyanine has been identified as a good electrocatalyst for CO 2 RR owing to its high selectivity and activity for CO production. , Besides, oxide-derived metal-based materials such as CuO, Cu 2 O, − Ag 2 O, , NiO, , and TiO 2 − have been successfully demonstrated to be active and selective catalysts for CO 2 reduction. ZnO, a low toxic compound, is an oxide-derived non-noble metal with promising optical, electronic, photovoltaic, − and catalytic properties. − Recently, a maximum faradaic efficiency (FE) of 92% for CO 2 to CO conversion has been reported for a nanoporous (NP) ZnO . However, the catalytic system suffered from degradation issues due to morphological changes during CO 2 reduction in aqueous media.…”

Section: Introductionmentioning

confidence: 99%

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Transparent Porous ZnO|Metal Complex Nanostructured Materials: Application to Electrocatalytic CO₂ Reduction

Guerrero

Schneider

Dumoulin

et al. 2023

ACS Appl. Nano Mater.

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We developed a simple and versatile approach for the electrochemical growth of hybrid ZnO|molecular catalyst nanostructured layers. Metal oxide|catalyst hybrid nanoporous layers with a sponge-like structure at the nanoscale and multiscale three-dimensional (3D) hierarchical structures based on nanoporous zinc oxide (ZnO) layers grown on ZnO nanorods were obtained. The thickness and structure of the hybrid nanoporous layers as well as the catalyst concentration can be tuned. This method allows the introduction of water-soluble molecular catalysts based on porphyrin and/or phthalocyanine derivatives into the ZnO matrix with a homogeneous distribution of the complex into the material. As an illustrative example, combining hybrid ZnO with a very low concentration of an encapsulated Co-based molecular catalyst inside the oxide layer results in a 97% catalytic response toward CO 2 reduction to CO with large currents in an organic solvent, highlighting the excellent electrocatalytic activities of such layers, which combine porosity, electronic conductivity, and synergetic properties from its components.

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Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Transparent Porous ZnO|Metal Complex Nanostructured Materials: Application to Electrocatalytic CO₂ Reduction

Guerrero

Schneider

Dumoulin

et al. 2023

ACS Appl. Nano Mater.

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“…where E B and N t are the characteristic energy and total trap density, respectively. In other words, the SCLC current is deduced as equation (25) [9,65]:…”

Section: Device Simulation Resultsmentioning

confidence: 99%

“…Combining n-type inorganic materials like ZnO with various p-type organic materials yields several advantages, including straightforward preparation [2], high thermal stability [3], better mechanical flexibility [4], feasibility of creating thinner thicknesses [5], increased energy efficiency, and lower consumption of power [6] as well as short response time and significant color quality [7]. Moreover, the easy access and preparation of ZnO nanostructures such as nanoparticles (NPs) [8], nanotubes (NTs) [9], nanorods (NRs) [10], nanoflowers [11], nanorings [12], nanoflakes [13] and nanosheets [14] have increased the efficiency of this semiconductor. Although these features have been achieved to some extent, more efforts are needed to yield the maximum performance of hybrid LEDs.…”

Section: Introductionmentioning

confidence: 99%

Effect of ZnO nanorods and nanotubes on the electrical and optical characteristics of organic and perovskite light-emitting diodes

Mohammadnejad¹,

Ahadzadeh²,

Rezaie³

2021

Nanotechnology

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Due to their suitable electrical and optical properties, ZnO nanostructure-based organic light-emitting diodes (LEDs) and perovskite LEDs can be utilized in the optoelectronics industry. A combination of ZnO nanorods and nanotubes with various types of polymers or hybrid perovskites leads to better waveguides and transportation of carriers. Therefore, more efficient LEDs are offered to the industry. In this research, four devices, including ZnO nanorod (nanotube)/MEH-PPV (CH3NH3PbI3) LEDs are simulated by SILVACO TCAD software. To provide deeper understanding of the impact of applying nanorods and nanotubes in hybrid heterostructures, an ab initio study has been conducted and the electronic structure, density of states, absorption coefficient and dielectric function of each of these nanostructures have been scrutinized. Subsequently, the obtained data have been utilized in the SILVACO simulation, and characteristics such as the current–voltage curve, light power–voltage curve, electroluminescence (EL) spectra and radiative recombination rate of four devices have been investigated. By employing a combination of a perovskite layer and ZnO nanotubes, the turn-on voltage of the simulated devices has been decreased from 13.7 V to 1.1 V. Moreover, a drastic increment in ultraviolet emission from devices based on ZnO nanotubes can be seen, which stems from occurrence of the whispering gallery mode and low defects of nanotubes compared to nanorods. A redshift caused by a reduction in the band gaps of the nanostructures can also be observed in the EL spectra.

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“…Zinc oxide (ZnO) is a wide band gap ( E g = 3.37 eV) semiconductor material, the intrinsic n-type conductive. It can be widely used in cosmetics, lubricants, coatings, catalysts, medicine, piezoelectric converter, rheostat, gas-sensitive sensors, surface acoustic devices, optical waveguide devices, transparent conductive electrodes, and other fields. − The LED based on ZnO is a subject that many researchers have been working on in recent years . The key to manufacturing ZnO-based LEDs is to achieve stable p-type doping of ZnO.…”

Section: Introductionmentioning

confidence: 99%

ZnO with p-Type Doping: Recent Approaches and Applications

Yang,

Wang,

et al. 2023

ACS Appl. Electron. Mater.

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ZnO is a significant semiconductor material with the characteristics of direct band gap, large exciton binding energy, and easy growth of high-quality nanostructures, and it is widely used in various fields. However, obtaining high-quality p-type ZnO has become a significant obstacle to the wide application of ZnO. The research on p-ZnO started several decades ago and is regarded as the research focus. Many researchers have obtained high-quality p-ZnO by chemical vapor deposition (CVD) and physical vapor deposition (PVD). To obtain high-quality p-ZnO, researchers have used some “better” techniques to improve the crystal quality and mobility of p-ZnO, such as molecular beam epitaxy (MBE) and post-treatment. This review provides an overview of some methods for obtaining high-quality p-ZnO, such as increasing the acceptor concentration, shallowing acceptor energy levels, and reducing donor defects. In addition, we also review the applications of p-ZnO in LEDs, UV detectors, thin-film transistors, gas sensing, bionic materials, and other fields.

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Hybrid inorganic-organic light-emitting heterostructure devices based on ZnO

Cited by 18 publications

References 258 publications

Transparent Porous ZnO|Metal Complex Nanostructured Materials: Application to Electrocatalytic CO₂ Reduction

Transparent Porous ZnO|Metal Complex Nanostructured Materials: Application to Electrocatalytic CO₂ Reduction

Effect of ZnO nanorods and nanotubes on the electrical and optical characteristics of organic and perovskite light-emitting diodes

ZnO with p-Type Doping: Recent Approaches and Applications

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Hybrid inorganic-organic light-emitting heterostructure devices based on ZnO

Cited by 18 publications

References 258 publications

Transparent Porous ZnO|Metal Complex Nanostructured Materials: Application to Electrocatalytic CO2 Reduction

Transparent Porous ZnO|Metal Complex Nanostructured Materials: Application to Electrocatalytic CO2 Reduction

Effect of ZnO nanorods and nanotubes on the electrical and optical characteristics of organic and perovskite light-emitting diodes

ZnO with p-Type Doping: Recent Approaches and Applications

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Product

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Transparent Porous ZnO|Metal Complex Nanostructured Materials: Application to Electrocatalytic CO₂ Reduction

Transparent Porous ZnO|Metal Complex Nanostructured Materials: Application to Electrocatalytic CO₂ Reduction