# Probing the localization length of photo-generated charges in organic materials

Source: [Probing the localization length of photo-generated charges in organic materials](<https://www.sota2.com/research/paper/68fa2cea1e209131ce8549fe>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-24T15:40:15.682Z

Authors: A.D. Chepelianskii, J. Wang, R.H. Friend

Published: 2013-12-21T11:47:38.000Z

## Abstract

We report a new experimental method to measure the localization length of photo-generated carriers in an organic donor-acceptor photovoltaic blend by comparing their dielectric and electron spin-resonance susceptibilities which are simultaneously measured by monitoring the resonance frequency of a superconducting resonator. We show that at cryogenic temperatures excitons are dissociated into long lived states, but that these are confined within a separation of around $4\\;{\\rm nm}$. We determine the Debye and recombination times, showing the coexistence of a fast electrical response corresponding to delocalized motion, with glass-like recombination kinetics.

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/1312.6245>)

[PDF](<https://arxiv.org/pdf/1312.6245.pdf>)