Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Simplified Jablonski diagram depicting the different energy levels induced after light irradiation. The phototherapeutic agent (photosensitizer) is excited from ground level (S0) to the singlet excited state, where it may lose its absorbed energy through fluorescence or non-radiative reactions. Effective agents undergo intersystem crossing and conversion into the triplet excited state, which enables photoreactions to take place [24].
