Comparative study of the effect of Mg, Zn and Ag dopants on properties of titanium dioxide as mesoporous ETL for photovoltaic application

Sharma, Sameeksha; Soleimanioun, Nazilla; Kaur, Ravneet; Rani, Mamta; Tripathi, S. K.

doi:10.1016/j.matchemphys.2020.123730

Cited by 11 publications

(3 citation statements)

References 45 publications

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“…Absorption coefficient decreases initially when doped with 9 wt% Mg but as the concentration of Mg rises further (12 wt% and 15 wt%), α increases. The increase in absorption can be due to surface plasmonic resonance as when light of a certain wavelength excites the conduction electrons, the conduction electrons interacts intensely with the incident light and oscillates which improves absorption [44].…”

Section: Uv-vis Spectroscopymentioning

confidence: 99%

Influence of Mg doping on the structural and optical properties of manganese oxide (Mn₂O₃) nanoparticles

Singla,

Kalra,

saini

et al. 2023

J. Phys.: Conf. Ser.

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The work presents here the synthesis of pristine manganese oxide (Mn2O3) nanoparticles and magnesium (Mg) doped Mn2O3nanoparticles with the help of the chemical co-precipitation method. We have investigated the influence of Mg doping (9 wt%, 12 wt%, and 15 wt%) on the optical and structural properties of Mn2O3. The structural properties of undoped and doped Mn2O3 nanoparticles have been studied using X-ray Diffraction Spectroscopy (XRD). The numerous physiochemical bondings present within the prepared nanoparticles have been examined using Fourier Transform Infrared Spectroscopy (FTIR). Both photoluminescence (PL) and UV-Visible (UV-Vis) spectroscopy have been used to investigate the optical characteristics. All the measurements are done at room temperature. All of the samples’ absorption spectra have been investigated within the wavelength range of 200 to 800 nm. The UV-Vis absorption spectrum for pristine Mn2O3 nanoparticles shows a sharp peak at 289 nm. We have further determined the band gap of the prepared samples using Tauc’s equation. The pristine Mn2O3 exhibits a direct bandgap of 4.04eV. At an excitation wavelength of 320 nm, the prepared samples’ emission spectra have also been recorded.

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Section: Uv-vis Spectroscopymentioning

confidence: 99%

Influence of Mg doping on the structural and optical properties of manganese oxide (Mn₂O₃) nanoparticles

Singla,

Kalra,

saini

et al. 2023

J. Phys.: Conf. Ser.

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“…Typically, the structure of a perovskite solar cell mainly consists of three parts: an electron transporting layer (ETL), a perovskite layer, and a hole transporting layer (HTL). Recently, metal oxide wide-band-gap semiconductors such as titanium dioxide (TiO 2 ), zinc oxide (ZnO), etc., have gained attraction for PSC applications as the charge transporting layer [9][10][11][12][13][14]. This is because of their high mobility, good energy alignment, and use of low-temperature processes [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

A Multi-Electron Transporting Layer for Efficient Perovskite Solar Cells

et al. 2021

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In this work, a multi-electron transporting layer (ETL) for efficient perovskite solar cells is investigated. The multi-ETL consists of five conditions including SnO2, SnO2/SnOx, TiO2, TiO2/SnO2, and TiO2/SnO2/SnOx. The best performance of PSC devices is found in the SnO2/SnOx double-layer and exhibits a power conversion efficiency equal to 18.39% higher than the device with a TiO2 single-layer of 14.57%. This enhancement in efficiency can be attributed to a decrease in charge transport resistance (Rct) and an increase in charge recombination resistance (Rrec). In addition, Rct and Rrec can be used to explain the comparable power conversion efficiency (PCE) between a PSC with a SnO2/SnOx double-layer and a PSC with a triple-layer, which is due to the compensation effect of Rct and Rrec parameters. Therefore, Rct and Rrec are good parameters to explain the efficiency enhancement in PSC. Thus, the Rct and Rrec from the electrochemical impedance spectroscopy (EIS) technique is an easy and alternative way to obtain information to understand and characterize the multi-ETL on PSC.

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“…For reactions containing spectating counter-ions, absorption at surface sites will generally be under competition as the same equations apply to them. If the spectator ions have larger ionic radii they would require larger energy to incorporate into the surface due to the increased stress [177] . The increased stress would in turn raise the chemical potential of the crystal surface increasing the rate of dissolution in the areas under stress [178] .…”

Section: Primary Growth Of Ionic Crystalsmentioning

confidence: 99%

Flexographic printed nanogranular LBZA derived ZnO gas sensors: Synthesis, printing and processing

Lewis¹

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Within this document, investigations of the processes towards the production of a flexographic printed ZnO gas sensor for breath H2 analysis are presented. Initially, a hexamethylenetetramine (HMTA) based, microwave assisted, synthesis method of layered basic zinc acetate (LBZA) nanomaterials was investigated. Using the synthesised LBZA, a dropcast nanogranular ZnO gas sensor was produced. The testing of the sensor showed high sensitivity towards hydrogen with response (Resistanceair/ Resistancegas) to 200 ppm H2 at 328 °C of 7.27. The sensor is highly competitive with non-catalyst surface decorated sensors and sensitive enough to measure current H2 guideline thresholds for carbohydrate malabsorption (Positive test threshold: 20 ppm H2, Predicted response: 1.34). Secondly, a novel LBZA synthesis method was developed, replacing the HMTA by NaOH. This resulted in a large yield improvement, from a [OH-] conversion of 4.08 at% to 71.2 at%. The effects of [OH-]/[Zn2+] ratio, microwave exposure and transport to nucleation rate ratio on purity, length, aspect ratio and polydispersity were investigated in detail. Using classical nucleation theory, analysis of the basal layer charge symmetries, and oriented attachment theory, a dipole-oriented attachment reaction mechanism is presented. The mechanism is the first theory in literature capable of describing all observed morphological features along length scales. The importance of transport to nucleation rate ratio as the defining property that controls purity and polydispersity is then shown. Using the NaOH derived LBZA, a flexographic printing ink was developed, and proof-of-concept sensors printed. Gas sensing results showed a high response to 200 ppm H2 at 300 °C of 60.2. Through IV measurements and SEM analysis this was shown to be a result of transfer of silver between the electrode and the sensing layer during the printing process. Finally, Investigations into the intense pulsed light treatment of LBZA were conducted. The results show that dehydration at 150 °C prior to exposure is a requirement for successful calcination, producing ZnO quantum dots (QDs) in the process. SEM measurements show mean radii of 1.77-2.02 nm. The QDs show size confinement effects with the exciton blue shifting by 0.105 eV, and exceptionally low defect emission in photoluminescence spectra, indicative of high crystalline quality, and high conductivity. Due to the high crystalline quality and amenity to printing, the IPL ZnO QDs have numerous potential uses ranging from sensing to opto-electronic devices.

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Comparative study of the effect of Mg, Zn and Ag dopants on properties of titanium dioxide as mesoporous ETL for photovoltaic application

Cited by 11 publications

References 45 publications

Influence of Mg doping on the structural and optical properties of manganese oxide (Mn₂O₃) nanoparticles

Influence of Mg doping on the structural and optical properties of manganese oxide (Mn₂O₃) nanoparticles

A Multi-Electron Transporting Layer for Efficient Perovskite Solar Cells

Flexographic printed nanogranular LBZA derived ZnO gas sensors: Synthesis, printing and processing

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Comparative study of the effect of Mg, Zn and Ag dopants on properties of titanium dioxide as mesoporous ETL for photovoltaic application

Cited by 11 publications

References 45 publications

Influence of Mg doping on the structural and optical properties of manganese oxide (Mn2O3) nanoparticles

Influence of Mg doping on the structural and optical properties of manganese oxide (Mn2O3) nanoparticles

A Multi-Electron Transporting Layer for Efficient Perovskite Solar Cells

Flexographic printed nanogranular LBZA derived ZnO gas sensors: Synthesis, printing and processing

Contact Info

Product

Resources

About

Influence of Mg doping on the structural and optical properties of manganese oxide (Mn₂O₃) nanoparticles

Influence of Mg doping on the structural and optical properties of manganese oxide (Mn₂O₃) nanoparticles