5 Polymer Solar Cells: Development of π-Conjugated Polymers …
97
10HD
p:n=1:2
0
0 . 5
1 . 0
1 . 5
2 . 0
qxy (Å -1 )
0
0 . 5
1 . 0
1 . 5
2 . 0
~qz (Å -1
)
0
0 . 5
1 . 0
1 . 5
2 . 0
~qz
(Å -1
)
0
0 . 5
1 . 0
1 . 5
2 . 0
qxy (Å -1 )
10OD
1:2
12HD
1:2
14HD
1:2
14OD
1:2
0
0 . 5
1 . 0
1 . 5
2 . 0
qxy (Å -1 )
0
0.5
1.0
1.5
2.0
qxy (Å -1 )
0
0 . 5
1 . 0
1 . 5
2 . 0
qxy (Å -1 )
0
0.5
1.0
1.5
2.0
qxy (Å -1 )
12OD
1:2
0
0.5
1.0
1.5
2.0
~qz (Å -1
)
0
0 . 5
1 . 0
1 . 5
2 . 0
~qz (Å -1
)
BOBO
1:3
BOHD
1:2
BOOD
1:1
0
0.5
1.0
1.5
2.0
~qz (Å -1
)
0
0 . 5
1 . 0
1 . 5
2 . 0
qxy (Å -1 )
0
0.5
1.0
1.5
2.0
q (Å -1 )
0
0.5
1.0
1.5
2.0
~qz (Å -1
)
0
0.5
1.0
1.5
2.0
~qz (Å -1
)
0
0.5
1.0
1.5
2.0
~qz
(Å -1
)
EHOD
1:2
EHHD
1:4
0
0.5
1.0
1.5
2.0
q (Å -1 )
0
0 . 5
1 . 0
1 . 5
2 . 0
qxy (Å -1 )
0
0.5
1.0
1.5
2.0
qxy (Å -1 )
a
b
Fig. 5.8 2D GIXD patterns of PTzBT/PC 61 BM blend films. PTzBTs a with linear and branched
side chains and b with all-branched side chains. Reproduced with permission [25]. Copyright
(2014) Wiley
5.2.4 Impact of Backbone Orientation in Solar Cell
Performance
The performance of the cells based on PTzBTs was insensitive to the backbone orientation when the active layer was thin (<200 nm), whereas it was quite sensitive when