by admin | Jun 5, 2015 | sem1
Fluorescence Fluorescence is the emission of light by a substance that has absorbed light or other electromagnetic radiation. It is a form of luminescence. In most cases, the emitted light has a longer wavelength, and therefore lower energy, than the absorbed...
by admin | Jun 5, 2015 | sem1
Intersystem crossing When an electron in a molecule with a singlet ground state is excited (via absorption of radiation) to a higher energy level, either an excited singlet state or an excited triplet state will form. A singlet state is a molecular electronic state...
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...
