TY - GEN
T1 - Solvent effect on the morphology of P3HT/PCBM films
AU - Xie, Yu
AU - Dutta, Pavel
AU - Cengher, Dorin
AU - Bommisetty, Venkat
AU - Li, Jing
AU - Galipeau, David
AU - Qiao, Qiquan
N1 - Copyright:
Copyright 2009 Elsevier B.V., All rights reserved.
PY - 2009
Y1 - 2009
N2 - This work reports the study of solvent effects on the morphology for P3HT/PCBM films using chlorobenzene, 1, 2-dichlorobenzene and 1, 3-dichlorobenzene. Although extensive research has been focused on investigating devices using chlorobenzene and 1, 2-dichlorobenzene and it was found that 1, 2-dichlorobenzene led to an improved device performance, little work has been conducted in the morphology by comparing films fabricated via chlorobenzene, 1, 2-dichlorobenzene and 1, 3-dichlorobenzene. Atomic force microscopy (AFM) was performed to study the film morphology using chlorobenzene, 1, 2-dichlorobenzene and 1, 3-dichlorobenzene as solvents. Initial studies showed that the size of nanocrystallites in 1, 2-dichlorobenzene based films is smaller than nanoclusters in the other two films. Kelvin probe force microscopy (KFM) images, which were used to figure out the electron transport pathway, together with AFM images, showed the solvent effect on the morphology of these films. In addition, obvious red shifts were observed in the UV-Vis absorption spectra for the P3HT/PCBM blend from 1, 3-dichlorobenzene and 1, 2-dichlorobenzene compared to the one from chlorobenzene.
AB - This work reports the study of solvent effects on the morphology for P3HT/PCBM films using chlorobenzene, 1, 2-dichlorobenzene and 1, 3-dichlorobenzene. Although extensive research has been focused on investigating devices using chlorobenzene and 1, 2-dichlorobenzene and it was found that 1, 2-dichlorobenzene led to an improved device performance, little work has been conducted in the morphology by comparing films fabricated via chlorobenzene, 1, 2-dichlorobenzene and 1, 3-dichlorobenzene. Atomic force microscopy (AFM) was performed to study the film morphology using chlorobenzene, 1, 2-dichlorobenzene and 1, 3-dichlorobenzene as solvents. Initial studies showed that the size of nanocrystallites in 1, 2-dichlorobenzene based films is smaller than nanoclusters in the other two films. Kelvin probe force microscopy (KFM) images, which were used to figure out the electron transport pathway, together with AFM images, showed the solvent effect on the morphology of these films. In addition, obvious red shifts were observed in the UV-Vis absorption spectra for the P3HT/PCBM blend from 1, 3-dichlorobenzene and 1, 2-dichlorobenzene compared to the one from chlorobenzene.
KW - Crystallinity
KW - Morphology
KW - Nanoclusters
KW - P3HT/PCBM blends
KW - Solvent effect
KW - UV-Vis spectra
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U2 - 10.1117/12.826490
DO - 10.1117/12.826490
M3 - Conference contribution
AN - SCOPUS:70449586667
SN - 9780819477064
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Organic Photovoltaics X
T2 - Organic Photovoltaics X
Y2 - 3 August 2009 through 6 August 2009
ER -