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Synthesis, characterization, band gap tuning and applications of Cd-doped ZnS nanoparticles in hybrid solar cells

Paper ID Volume ID Publish Year Pages File Format Full-Text
26076 43933 2016 10 PDF Available
Title
Synthesis, characterization, band gap tuning and applications of Cd-doped ZnS nanoparticles in hybrid solar cells
Abstract

•The band gap of ZnS is effectively tuned by cadmium doping from 3.4 to 2.4 eV.•Conductivity of the Cd-doped ZnS nanoparticles first decreases and then increases to a maximum value of 3.99 × 10−5 Ω−1 m−1 at cadmium content of 0.5 M.•Cadmium doping does not affect the cubic crystalline structure of ZnS nanoparticles except minor distorsions.•The overall% η of the solar cell using Cd-doped ZnS (0.5 M) nanoparticles was increased by 2.33 times with respect to the reference device (P3HT-ZnS).

Zinc sulphide (ZnS) and Cd-doped ZnS nanoparticles, Zn1-xCdxS (x = 0.2 − 0.5), were synthesized by wet chemical method. Optical, electrical and photovoltaic properties of the nanoparticles were investigated. Scanning electron microscope (SEM) supplemented with EDAX was used to find grain size and chemical composition of the synthesized material. A significant bathochromic shift of absorption band with respect to the undoped zinc sulphide was noticed by increasing the cadmium concentration in the doped samples. Consequently the band gap was tuned into the visible region. XRD analysis showed that the material existed in cubic crystalline state. The conductivity of the doped material, though progressively increasing step by step, was found lower than undoped ZnS at cadmium contents ranging from 0.2 to 0.4 M but at the highest dopant concentration (Cd, 0.5 M) the conductivity attained a value higher than undoped ZnS by 1.21 × 10−5 Ω−1 m−1. The synthesized material in combination with P3HT, poly (3-hexyl thiophene) was used in the fabrication of solar cells. These devices gave higher short circuit densities and efficiencies than the reference device.% η was increased by 2.33 times with respect to reference device.

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Keywords
ZnS nanoparticles; Doped ZnS; Solar cell; Band gap tuning and conductivity
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Synthesis, characterization, band gap tuning and applications of Cd-doped ZnS nanoparticles in hybrid solar cells
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 325, 1 July 2016, Pages 29–38
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us