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• W2979668081 endingPage "99" @default.
• W2979668081 startingPage "61" @default.
• W2979668081 abstract "Nonstoichiometric SnO2 have attracted considerable research attention since last few decades due to its potential applications in electronic, optoelectronic, and electrochemical devices. SnO2 is an important transparent n-type semiconducting material presenting large bandgap (~ 3.6 eV) and it is highly reflective in near-infrared region. These properties are related to the presence of free carriers and oxygen vacancy holes either in pure or doped state of SnO2. Various synthetic routes like sol-gel technology, hydrothermal process, chemical vapor deposition, spray pyrolysis, etc. are available to tailor the properties of these materials using different dopants. Optoelectronics is an important area for the applications of such type of nanostructured semiconducting (particles or thin films) materials. At nanoscale availability of large surface to volume ratio, appearance of quantum confinement effects, etc. provides a tuneable optical bandgap. In view of all these facts, it is proposed to carry out a systematic study on how optical properties of SnO2 nanomaterials are changing with various synthetic routes, with dopants or with different dopant concentrations. This chapter deals with the optical properties of SnO2 nanomaterials, based on the available literature of last two to three decades. For understanding the optical properties of these materials, two main spectroscopic techniques viz. Ultraviolet (UV)-Vis and photoluminescence (PL) have been discussed in detail with special reference to direct bandgap and various trap states within the bandgap due to point defects. It was observed that the particle size plays an important role and quantum confinement effects appear when the particle size is comparable to Bohr excitonic radius and band-to-band transitions appears. PL emission spectra of pure and doped SnO2 have been discussed in detail in the light of various factors such as particle size, temperature, or excitonic photon energy. Optical properties of metastable states SnO, Sn2O3, and Sn3O4 of Sn-O system have also been discussed in brief along with passivation of surface states and surface plasmon resonance." @default.
• W2979668081 created "2019-10-18" @default.
• W2979668081 creator A5070499008 @default.
• W2979668081 date "2020-01-01" @default.
• W2979668081 modified "2023-10-13" @default.
• W2979668081 title "Optical properties of tin oxide nanomaterials" @default.
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