Energy of incident light

In the denominator of Eq. (29) one can detect the false origin in the spectrum at the frequency Qa — o/p+ 5a which, together with tta quanta of the accepting mode , compensates the energy of incident light. The intensity maximum is at... 

The first step is absorption of photons to form electron-hole pairs. Semiconductors have the band structure in which the conduction band is separated from the valence band by a band gap with a suitable width. When the energy of incident light is larger than that of a band gap, electrons and holes are generated in the conduction and valence bands, respectively. 

It has to be noted that semiconductors when used as photocatalysts absorb the energy of incident light which is greater than their band gap. Also, the smaller the size of photocatalyst particles, the more sites there are for water decomposition. Furthermore, on the surface active sites, cocatalyst is usually applied to reduce the overpotential at the interface between liquid and semiconductor and conduct the water redox reaction. The cocatalyst plays important role during the water-splitting process. High crystallinity and small dimension of the photocatalyst can reduce the... 

FIGURE 7.23 Reflectivity curves as a function of the energy of incident light for (1) AuAlj, (2) Aulnj, and (3) AuGa2 [62]. (From the colour of gold and its alloys The mechanism of variation in optical properties, K.E. 

Figure 7.8. Relationship of energy absorbed by molecule to wavelength of incident light. Dissociation energies of various bonds are indicated to show wavelength below which breakdown may occur.

Johns would like to restrict the term exposure to the measure of incident light energy, and the term dose to the measure of light energy absorbed.11... 

The most efficient silicon cells produced are based on p — n homojunctions and convert 23.1% of the energy in incident light set to simulate the global air mass (AM) 1.5 spectrum, an artificial reference spectrum used to standardize measurement of PV power, with an intensity of 1000 W/m2... 

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