Ac Conductivity and Dielectric Studies of Polypyrrole Copper Zinc Iron Oxide Nanocomposites

Shanthala, V.S.; Devi, S.N. Shobha; Murugendrappa, M. V.

doi:10.9790/4861-0805028390

Cited by 8 publications

(4 citation statements)

References 8 publications

(5 reference statements)

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“…The dielectric constant value of ZrTiO4 shows more value (50) whereas ZrO2 shows lower value (40). The similar results are reported by Viticoli et al [17] and also Shanthala et al [18]. The variation of tanδ with respect to frequency is as shown in the Fig.…”

Section: ɛʹ = ɛ ̥supporting

confidence: 79%

A Comparable Study of Structural, Dielectric and Humidity Sensing Properties of Solution Combustion Synthesized ZrO2 and ZrTiO4 Nano Powders

Madhusudhana¹,

Shobhadevi²,

Nagabhushana³

et al. 2018

JNST

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Simple and cost-effective solution combustion method is used to synthesize nano powders of ZrO2 and ZrTiO4. The structural and morphological analysis was done by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Results revealing the phase confirmation and structure of synthesized samples. Dielectric properties of the synthesized ZrTiO4 powder dominates the synthesized ZrO2 having superior dielectric constant (ɛʹ = 50), Low dielectric loss and enhanced conductivity (σac = 2.75 x 10 -4 Scm -1 ) at room temperature. The humidity sensing properties for ZrTiO4 shows good linear behavior compare to ZrO2.

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Section: ɛʹ = ɛ ̥supporting

confidence: 79%

A Comparable Study of Structural, Dielectric and Humidity Sensing Properties of Solution Combustion Synthesized ZrO2 and ZrTiO4 Nano Powders

Madhusudhana¹,

Shobhadevi²,

Nagabhushana³

et al. 2018

JNST

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“…Hence, the absorption increases as the photon energy increases. The energy-dependent absorption coefficient can also be described by the Tauc equation: α false( h ν false) 1 / n = A false( h ν − E g false) where A is the constant and n is the transition constant whose values for indirect and direct E g materials are 2 and 0.5, respectively. The sun emits a more intense spectrum in the visible spectrum, and the PVSKs exhibits greater absorption in the visible region, which opens up the possibility to explore these materials as absorbers in PSCs.…”

Section: Resultsmentioning

confidence: 99%

Design Insights and Photovoltaic Performance Analysis of Non-Lead Inorganic RbSnX₃ (X = I, Br, Cl) Perovskites through Coupled Density Functional Theory and SCAPS-1D Simulation Frameworks

Ravidas,

Roy,

Samajdar

2024

ACS Appl. Electron. Mater.

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The development of lead (Pb)-free perovskite solar cells (PSCs) addresses the stability, commercialization, environmental, and health challenges associated with Pb-based PSCs. In the current research, Pb-free rubidium (Rb)-based perovskites RbSnX 3 (X = I, Br, Cl) were investigated through density functional theory (DFT) using the WIEN2K code and SCAPS-1D tool for analysis of photovoltaic (PV) applications. We computed the optoelectronic and structural properties of cubic phase RbSnX 3 (X = I, Br, Cl) perovskites (PVSKs). The DFT-computed band gap (E g ) of RbSnI 3 , RbSnBr 3 , and RbSnCl 3 were found to be 0.67, 1.28, and 1.53 eV, respectively, using the TB-mBJ exchange-correlation potential. The obtained E g of RbSnI 3 is very small, and is not suitable for solar cell (SC) applications. On the other hand, the E g values of RbSnBr 3 and RbSnCl 3 PVSKs are suitable for SC applications due to their closeness to the ideal E g of 1.45 eV, as predicted by the Shockley− Quiesser limit of theoretical efficiency. Therefore, we investigated the PV performance of RbSnBr 3 and RbSnCl 3 using SCAPS-1D software. The optical and electronic properties of cubic RbSnX 3 (X = Br, Cl) used as an absorber in PSCs extracted from DFT, have been used for the simulation. We varied the perovskite layer parameters to achieve the optimal performance for PSCs. We simulated RbSnX 3 (X = Br, Cl)-based PCS with several hole-transport layers (HTLs) and electron-transport layers (ETLs). Titanium dioxide (TiO 2 ) as the ETL and poly(triarylamine) (PTAA) as the HTL exhibited best performance among different combinations. The PSC structure fluorine-doped tin oxide (FTO)/TiO 2 /RbSnBr 3 /PTAA/Au delivered a PCE of 22.53%, J SC of 35.05 mA/cm 2 , V OC of 0.78 V, and FF of 73.06%, while FTO/TiO 2 /RbSnCl 3 /PTAA/Au exhibited a PCE of 22.64%, J SC of 26.63 mA/cm 2 , V OC of 1.08 V, and FF of 78.17%. The remarkable ability of RbSnX 3 (X = Br, Cl) PVSKs to capture photons efficiently and effectively can help in the development of PV and optoelectronic devices.

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“…As a result, their oscillations begin to lag behind the fields. With further increase in frequency, the dipole is unable to follow the field, and the orientation ceases; thus it adopts constant values [35].…”

Section: Dielectric Constant Resultsmentioning

confidence: 99%

FTIR and electrical behavior of blend electrolytes based on (PVA/PVP)

ALjubouri

Jawad²

2023

IJP

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Solution cast method was used to create the polymer electrolytes. Under certain circumstances, the electrolyte content of polymers was determined using constant percent PVA/PVP(50:50),EC and PC (1:1) with various quantities of KI (10, 20, 30, 40, 50 wt. %) and iodine I2 = 10 % of salt wt. The complicated formation of polymer blends was validated by FTIR investigations. Electrical conductivity was measured using an impedance analyzer at frequencies ranging from 50 Hz to 1MHz and temperatures ranging from 293 K to 343 K. At ambient temperature, an electrolyte with 50% KI content had a higher electrical conductivity value of 5.3 10-3 (S/cm). The magnitude of electrical conductivity increased as salt content and temperature rose. The blend electrolytes' greater dielectric at lower frequencies might be owing to the dipoles having enough time to align with the electric field, resulting in stronger polarisation. The reduction in activation energy (Ea) suggests that faster-conducting electrolytes prefer to move with less energy.

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Ac Conductivity and Dielectric Studies of Polypyrrole Copper Zinc Iron Oxide Nanocomposites

Cited by 8 publications

References 8 publications

A Comparable Study of Structural, Dielectric and Humidity Sensing Properties of Solution Combustion Synthesized ZrO2 and ZrTiO4 Nano Powders

A Comparable Study of Structural, Dielectric and Humidity Sensing Properties of Solution Combustion Synthesized ZrO2 and ZrTiO4 Nano Powders

Design Insights and Photovoltaic Performance Analysis of Non-Lead Inorganic RbSnX₃ (X = I, Br, Cl) Perovskites through Coupled Density Functional Theory and SCAPS-1D Simulation Frameworks

FTIR and electrical behavior of blend electrolytes based on (PVA/PVP)

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Ac Conductivity and Dielectric Studies of Polypyrrole Copper Zinc Iron Oxide Nanocomposites

Cited by 8 publications

References 8 publications

A Comparable Study of Structural, Dielectric and Humidity Sensing Properties of Solution Combustion Synthesized ZrO2 and ZrTiO4 Nano Powders

A Comparable Study of Structural, Dielectric and Humidity Sensing Properties of Solution Combustion Synthesized ZrO2 and ZrTiO4 Nano Powders

Design Insights and Photovoltaic Performance Analysis of Non-Lead Inorganic RbSnX3 (X = I, Br, Cl) Perovskites through Coupled Density Functional Theory and SCAPS-1D Simulation Frameworks

FTIR and electrical behavior of blend electrolytes based on (PVA/PVP)

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Design Insights and Photovoltaic Performance Analysis of Non-Lead Inorganic RbSnX₃ (X = I, Br, Cl) Perovskites through Coupled Density Functional Theory and SCAPS-1D Simulation Frameworks