Issue 40, 2009
From the journal:

Journal of Materials Chemistry

Multi-photon non-linear photocurrent in organic photodiodes†

M. Garbugli,a   A. Gambetta,a   S. Schrader,b   T. Virgilic  and  G. Lanzanid  

a Dipartimento di Fisica, Politecnico di Milano, Piazza L. Da Vinci 32, Milano, Italy

b University of Applied Sciences Wildau, Engineering Physics, Bahnhofstrasse, Wildau, Denmark

c IFN-CNR Politecnico di Milano, Piazza L. Da Vinci 32, Milano, Italy

d IIT Dipartimento di Fisica, Politecnico di Milano, Piazza L. Da Vinci 32, Milano, Italy

Abstract

We report a study on non-linear multi-photon photocurrent in organic photodiodes based on single beam intensity dependent photocurrent and pulse autocorrelation photocurrent measurements. We show that such experiments have at least two important outcomes: i) they provide a valuable tool for investigating the electronic structure of organic semiconductors and the charge photogeneration mechanism; ii) they offer a chance for photonic applications such as short pulse characterization, frequency mixing, threshold and peak power detection. Several organic semiconducting materials are characterised performing measurements of ultrafast excitation photoconductivity, aiming at specific application in the green-blue spectral region. In some cases interpretative models of the charge generation dynamics are used for numerically reproducing the results.

Graphical abstract: Multi-photon non-linear photocurrent in organic photodiodes

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Article information

DOI
https://doi.org/10.1039/B908364B
Article type
Paper
Submitted
27 Apr 2009
Accepted
16 Jul 2009
First published
07 Aug 2009

J. Mater. Chem., 2009,19, 7551-7560

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Multi-photon non-linear photocurrent in organic photodiodes

M. Garbugli, A. Gambetta, S. Schrader, T. Virgili and G. Lanzani, J. Mater. Chem., 2009, 19, 7551 DOI: 10.1039/B908364B

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