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MEH-PPV GIWAXS cb06ls cbhs2 (100) ITO ITO (100)

MEH-PPV GIWAXS

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MEH-PPV GIWAXS. (100). (100). ITO. ITO. cb06ls. cbhs2. MEH-PPV GIWAXS. (100). (100). ITO. ITO. tlls. tl06xhsw. (the ellipse may indicate a scattering feature due to the ordering of the alkyl side chains, - PowerPoint PPT Presentation

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MEH-PPV GIWAXS

cb06ls cbhs2

(100)ITO ITO

(100)

MEH-PPV GIWAXS

tlls tl06xhsw

(100)ITO ITO

(100)

(the ellipse may indicate a scattering feature due to the ordering of the alkyl side chains,however, I would like to look into this some more in the data from the annealed films

Observations (Detlef Smilgies, CHESS)all samples look quite similar:- only the MEH-PPV (100) reflection is visible: the film has very limited order- (001) is quite broad: only short-range order (use Scherrer formula)- (001) is preferentially aligned along the surface normal with a width of roughly 5 deg: the polymer chains seem to want to be parallel to the substrate with the a stacking of the aromatic rings perpendicular to the substrate. for cb solvent there seems to be very little difference between ls and hs

for tl solvent films also look similar with respect to structure. It seems that the ls film is quite a bit thicker than the hs film judging from the scattering intensity, however:

Remarks:1) These observations are only meaningful, if all data files were collected at the minimum just past the MEH-PPV critical angle, and if the exposure times were equal ! –> I assume this is the case, but I did not check. (The intensity of the ITO powder ringis quite different in the two tl samples which indicates that exposures or incident angles were different.) Please check the your log.2) Better information about thickness can be obtained from the XR data, if they aregood enough.

next step: radial and angular distribution of the (100) peak, in order to compare samples in detail; this is done using the fit2d CAKE feature with the special integrationoption, when RADIAL BINS or ANGULAR bins is set to 1.

needed for this: distance calibration – I will work on this next, and will provide the integrations as an example how to treat the other GIWAXS data