Fabrication of Dye Sensitized Solar Cell and Efficiency Enhancement by Using N719 and Z907 Dyes Mixture
Abdulrahman K. Ali,
Nabeel A. Bakr,
Shaimaa M. Jassim
Issue:
Volume 2, Issue 3, November 2016
Pages:
20-24
Received:
29 September 2016
Accepted:
17 October 2016
Published:
28 October 2016
DOI:
10.11648/j.jmpt.20160203.11
Downloads:
Views:
Abstract: This study aims to investigate the effect of N719 and Z907 dyes mixture (1:1 v/v ratio) on the DSSCs fabricated successfully using a simple procedure without the need for any complicated facilities. The XRD analysis of the TiO2 layer confirmed that it has a polycrystalline structure belonging to anatase phase with crystallite size of 12.4 nm. UV-Vis spectroscopy was used to characterize the absorbance spectra of the TiO2 layer, N719 dye, Z907 dye, dyes mixture and the fabricated DSSCs as well. The absorption spectra in the wavelength range of (350-750) nm show that the DSSC fabricated with dyes mixture has higher absorption compared to the other two cells. The dyes mixture performs better than the individual dyes due to the broadening of its UV-Vis spectrum in the blue region. The energy gap of the TiO2 layer estimated by Tauc’s plot was 3.12 eV. The SEM micrograph of the TiO2 layer shows that the layer has a spongy shape with reduction in the number of open pores making easy for dye adsorption and electron transport. The average roughness, root mean square roughness and grain size of the TiO2 layer estimated from the AFM micrograph and the granularity cumulative distribution chart were about 0.356 nm, 0.423 nm and 82.48 nm respectively. Solar cells with efficiency as high as 2.287% have been achieved using the dyes mixture as sensitizer which represents an enhancement of ~ 70% and ~ 106% compared to the DSSCs efficiencies prepared by N719 and Z907 dyes respectively.
Abstract: This study aims to investigate the effect of N719 and Z907 dyes mixture (1:1 v/v ratio) on the DSSCs fabricated successfully using a simple procedure without the need for any complicated facilities. The XRD analysis of the TiO2 layer confirmed that it has a polycrystalline structure belonging to anatase phase with crystallite size of 12.4 nm. UV-Vi...
Show More
Thin Films to Single Crystals: Organometal Halide Perovskite Materials for Advanced Optoelectronics
Padmaja Guggilla,
Ashwith Chilvery,
Kamala Bhat,
Edelmy J. Bernardez
Issue:
Volume 2, Issue 3, November 2016
Pages:
25-31
Received:
24 October 2016
Accepted:
12 November 2016
Published:
12 December 2016
DOI:
10.11648/j.jmpt.20160203.12
Downloads:
Views:
Abstract: The recent emergence of perovskite materials has revolutionized the photovoltaic (PV) technology and offers solutions to contemporary energy and environmental issues. Moreover, the capabilities of single crystals are far superior to the thin film counterparts. This mini review outlines the growth parameters and crystal kinetics involved in the perovskite single crystal growth process for a superior wafer-style solar cell devices. Typically, perovskite solar cells with perovskite in the film form are attractive with their higher performance but, they degrade at faster rate, suffer immensely from a high density of traps and grain boundaries, which markedly limit the potential performance in devices. This review discusses a list of factors affecting it and provide future prospects of this thriving technology.
Abstract: The recent emergence of perovskite materials has revolutionized the photovoltaic (PV) technology and offers solutions to contemporary energy and environmental issues. Moreover, the capabilities of single crystals are far superior to the thin film counterparts. This mini review outlines the growth parameters and crystal kinetics involved in the pero...
Show More
Third-Order Nonlinear Optical Properties of Orange G Dye in Solution and Polymer Film Using Z-scan Technique
Furat A. Al-Saymari,
Imad Al-Deen Hussein A. Al-Saidi,
Nadia A. Al-Asadi,
Ghufran M. Shabeeb,
Chassib A. Emshary
Issue:
Volume 2, Issue 3, November 2016
Pages:
32-37
Received:
15 October 2016
Accepted:
3 November 2016
Published:
29 December 2016
DOI:
10.11648/j.jmpt.20160203.13
Downloads:
Views:
Abstract: The nonlinear optical properties of Orange G dye in water at different concentrations and in a solid polymer film have been investigated using a single-beam z-scan technique. Experiments were performed using continuous wave (CW) laser operating at 532 nm wavelength as a source of excitation. Effect of different incident intensities on the nonlinear optical properties of Orange G dye was studied. The open aperture z-scan curves revealed that both the dye solution in water and dye doped polymer film exhibited reverse saturable absorption. While the closed aperture z-scan curves of the dye displayed negative nonlinear refraction (self-defocusing effect). The results showed that the Orange G dye exhibited large values of the nonlinear optical coefficients β, n2, and χ(3) of the order of 10-3 cm / W, 10-7 cm2 / W, and 10-5 (esu), respectively. Our results suggest that the Orange G dye is a good candidate material for applications in nonlinear optical devices.
Abstract: The nonlinear optical properties of Orange G dye in water at different concentrations and in a solid polymer film have been investigated using a single-beam z-scan technique. Experiments were performed using continuous wave (CW) laser operating at 532 nm wavelength as a source of excitation. Effect of different incident intensities on the nonlinear...
Show More
