Jablonski Diagram Explanation

A screencast walkthrough of Jablonski energy-level diagrams and their role in photopolymerization — covering absorption, fluorescence, phosphorescence, intersystem crossing, and photoinitiator photophysics.

Prof. Christopher N. Bowman — Bowman Research Group, University of Colorado Boulder.
This screencast explains Jablonski diagrams and their application to photoinitiator excited-state dynamics in photopolymerization systems.

Key Concepts Covered

Ground & Excited States

S₀, S₁, S₂ singlet states and T₁ triplet state energy levels

Radiative Transitions

Absorption, fluorescence, and phosphorescence pathways

Non-Radiative Processes

Internal conversion, intersystem crossing, and vibrational relaxation

Quantum Yields

Competing rate constants and efficiency of each deactivation pathway

Photoinitiator Relevance

How excited-state chemistry drives radical generation and polymerization

Sensitization

Energy transfer from sensitizer to co-initiator via triplet-state mechanisms

For interactive calculations of Jablonski diagram parameters, see the Jablonski Diagram Calculations tool (coming soon).