by admin | Jun 5, 2015 | sem1
Internal Conversion Internal conversion is a transition from a higher to a lower electronic state in a molecule or atom. It is sometimes called “radiation less de-excitation”, because no photons are emitted. It differs from intersystem crossing in that,...
by admin | Jun 5, 2015 | sem1
Quantum Efficiency The “quantum efficiency” (Q.E.) is the ratio of the number of carriers collected by the solar cell to the number of photons of a given energy incident on the solar cell. The quantum efficiency may be given either as a function of...
by admin | Jun 5, 2015 | sem1
Lambert Beer Law The Absorbance of a solution For each wavelength of light passing through the spectrometer, the intensity of the light passing through the reference cell is measured. This is usually referred to as Io – that’s I for Intensity. The...
by admin | Jun 5, 2015 | sem1
Stark Einstein law Stark Einstein law The Stark Einstein law is named after German-born physicists Johannes Stark and Albert Einstein, who independently formulated the law between 1908 and 1913. It is also known as the photochemical equivalence law or photoequivalence...
by admin | Jun 5, 2015 | sem1
Grotthus-Draper law The Grotthus–Draper law (also called the Principle of Photochemical Activation) states that only that light which is absorbed by a system can bring about a photochemical change. Materials such as dyes and phosphors must be able to absorb...
by admin | Jun 5, 2015 | sem1
Laws of Photochemistry The study of chemical reactions, isomerizations and physical behavior that may occur under the influence of visible and/or ultraviolet light is called Photochemistry. Two fundamental principles are the foundation for understanding photochemical...
