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Phys. Rev. Lett. 100, 196602 (2008) [4 pages]

Exact Solution for Hopping Dissociation of Geminate Electron-Hole Pairs in a Disordered Chain

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O. Rubel*, S. D. Baranovskii, W. Stolz, and F. Gebhard
Department of Physics and Material Sciences Center, Philipps-University Marburg, Marburg 35032, Germany

Received 18 February 2008; published 15 May 2008

A universal theoretical description of the dissociation problem for electron-hole pair on a one-dimensional chain in the hopping regime is proposed. Widely used results of Frenkel and Onsager theories are obtained as particular cases of the general solution. The application of the analytical theory to disordered chains shows that disorder enhances dissociation of geminate electron-hole pairs at low electric fields and suppresses at high fields.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.196602
DOI:
10.1103/PhysRevLett.100.196602
PACS:
72.80.Ng, 72.20.Jv, 72.80.Le

*Oleg.Rubel@Physik.Uni-Marburg.de