Near-field scanning photocurrent measurements of polyfluorene blend devices: directly correlating morphology with current generation

Title: Near-field scanning photocurrent measurements of polyfluorene blend devices: directly correlating morphology with current generation
Creator: McNeill, Christopher R.; Frohne, Holger; Holdsworth, John L.; Dastoor, Paul C.
Relation: Nano Letters Vol. 4, Issue 12, p. 2503-2507
Publisher Link: http://dx.doi.org/10.1021/nl048590c
Publisher: American Chemical Society
Resource Type: journal article
Date: 2004
Description: Near-field scanning photocurrent microscopy (NSPM) measurements probing the relationship between morphology and current generation in photovoltaic devices based on p-xylene processed poly(9,9'-dioctylfluorene-co-bis-N,N'-(4,butylphenyl)-bis-N,N'-phenyl-1,4-phenylene-diamine) [PFB] and poly(9,9'-dioctylfluorene-co-benzo-thiadiazole) [F8BT] blend films are presented. We find that current generation occurs primarily from within the micron-sized phase-segregated domains, with the PFB-rich phase contributing significantly more current than the surrounding F8BT-rich regions. These results are explained by nanoscale intermixing within the micron-sized domains, with differing extents of intermixing in the PFB- and F8BT-rich domains.
Subject: near-field scanning photocurrent microscopy; NSPM; current generation; micron-sized phase-segregated domains
Identifier: http://hdl.handle.net/1959.13/28897
Identifier: uon:2298
Identifier: ISSN:1530-6984
Language: eng
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