Calculation of Carrier lifetime
How can I calculate carrier lifetime from time-resolved photoluminescence data?
Hi,.
You can fit the PL decay curve exponentially (single, bi, tri etc)
using the following equation (e.g for bio-exponential)
Y (τ) = 𝒂𝟏 𝒆^−𝝉/𝝉𝟏 + 𝒂𝟐 𝒆^−𝝉/𝝉𝟐
The average lifetime of all samples calculated by
𝝉𝒂𝒗𝒆 = 𝒂𝟏𝝉𝟏^𝟐+ 𝒂𝟐𝝉𝟐^𝟐/
𝒂𝟏𝝉𝟏 + 𝒂𝟐𝝉𝟐
Where τ1 and τ2 are the first and second component of decay time, a1 and a2 are corresponding
amplitudes. For details please find the attached file.
The equation mentioned by Amar Nath Yadav defines so called "intensity averaged lifetime" and is valid only under specific circumstances. There is also another equation, so called "amplitude averaged lifetime", defined in this paper: (1) Article The Correct Use of “Average” Fluorescence Parameters
The choice of appropriate formula for average lifetime is not that obvious. Recently, we wrote a paper that explains the differences between two different formulas for average lifetime: (2)Article On the choice of proper average lifetime formula for an ense...
In this paper, we use equations equivalent to formulas given in (1) but involving simple integrals (this has the advantage that no fitting is required). Obviously, everything stated above is important only in the case of non-single exponential decays.- Badges
- Science topic
- Similar topics
- Linguistics
- Composition Studies
- Publications