Titanium Dioxide Nanomaterials: Basics and Design, Synthesis and Applications in Solar Energy Utilization Techniques

Huang, Fuqiang

doi:10.5772/10339

Cited by 2 publications

(2 citation statements)

References 33 publications

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“…This is a pa-rameter that acts as a scaling factor in the determination of the shape of the density of states and therefore small values of the OJL mass are the best. The smaller the OJL mass of electrons, the higher the electron mobility [26]. Table 2 shows that the higher the values of the OJL mass, the higher the values of OJL Gap energy (EO) which agreed well with literature [27].…”

Section: Figure 6 -Combined Fitting Of Simulated Versus Experimental supporting

confidence: 84%

Optical Properties and Analysis of OJL Model’s Electronic inter-band Transition Parameters of TiO2 Films

Musila

Munji

Simiyu

et al. 2018

PoS

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Titanium dioxide is a wide band gap semiconductor responsible for the bright white appearance in most substances. This material has many unique properties due to its extraordinary chemical stability. TiO 2 has a conduction band that closely matches the excited energy level of organic dyes hence it is used in fabrication of photo-anode electrode of dye sensitized solar cell. However, the optical properties and the density of states of TiO 2 thin films determine the performance of dye sensitized solar cell fabricated from TiO 2 photo-anode electrode. For this reason, the purpose of this study was to investigate the optical properties and the OJL electronic inter-band transition analysis of TiO 2 nanoparticle thin films. Under the OJL model, the expressions of density of states were specified for the optical transition from the valence band to the conduction band. The TiO 2 nanoparticles were prepared using sol-gel and hydrothermal methods and deposited on a conductive glass substrate by screen printing and spray pyrolysis techniques. SEM analysis revealed that TiO 2 nanoparticles were spongy and had unevenly sphere-shaped profile while TiO 2 nanotubes had a skein-like morphology with abundant number of nanotubes intertwined together. This study showed that TiO 2 thin films have both direct and indirect band-gaps. The OJL Gap energy (E 0) values were observed to be between 30273.2356 and 31072.0000 wavenumbers which translated to band-gap energies between 3.744 and 3.843 eV. From these findings showed that TiO 2 films prepared could be used in the fabrication of high performing dye-sensitized solar cell.

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Section: Figure 6 -Combined Fitting Of Simulated Versus Experimental supporting

confidence: 84%

Optical Properties and Analysis of OJL Model’s Electronic inter-band Transition Parameters of TiO2 Films

Musila

Munji

Simiyu

et al. 2018

PoS

View full text Add to dashboard Cite

show abstract

“…Natural dyes are obtained from flowers such as Begonia [13], Hibiscus surattensis [14]and from fruits like Raspberries [15] and Cherries [16] to name a few.Titanium dioxide (TiO 2 ) is highly investigated and explored semiconductor for DSSC due to its various properties like appropriate band gap [17], stability over wide pH range under irradiation, non-toxicity and chemical inertness [18]. Enhanced cell performance can be expected on using nano-structured materials that has influence on charge transport and charge separation ability [19]. Synthesis of TiO 2 nano particles (NP) using different routes has been extensively studied out of which Sol-gel route is one of the most popular one.…”

Section: Introductionmentioning

confidence: 99%