Phonon-Induced Absorption Line Shapes in Organic Semiconductors

Quantifying disorder is an important task in organic semiconductor research [1,2] because of its impact on the carrier mobility and device performance. We analyze models of amorphous and crystalline donor-acceptor systems regarding their response to optical excitations. [3] We study the excited-state density of states with varying disorder and electron-phonon interaction and compare our results to absorption measurements on donor-acceptor blends.


[1] D. Venkateshvaran et al. Nature 515, 384 (2014).

[2] K. Vandewal et al. J. Am. Chem. Soc. 139, 1699 (2017).

[3] M. Panhans et al. (in preparation)