Environmental Engineering Reference
In-Depth Information
Table 6 Film uniformity of P3HT:PC
61
BM blend film and iI-T3and PC
71
BMblend film layers
by spin-coating versus blade-slit coating
Spin
Avg
a
SD
b
U
c
P3HT:PC
61
BM
Pos
d
1
2
3
4
5
6
7
8
9
(nm)
(nm)
(%)
Thk
e
350.2
278.8
327.3
337.7
265.7
318.4
328.3
277.8
317.1
311.3
28.1
9.0
Blade
P3HT:PC
61
BM
Pos
d
1
2
3
4
5
6
7
8
9
Thk
e
247.1
249.2
252.5
266.1
212.6
236.1
264.7
253.1
287.9
252.1
19.7
7.8
Il-T3(Low-band gap polymer):PC
71
BM
Pos
d
1
2
3
4
5
6
7
8
9
Thk
e
114.2
105.6
125.1
99.2
102.2
118.2
95.3
103.2
110.2
108.1
9.1
8.4
a
Avg: average thickness of nine points (nm)
b
SD: standard deviation (nm)
c
U: nonuniformity (%): (SD/Avg)
d
Pos: measured position
e
Thk: thickness
Fig. 22 P3HT:PC
60
BM and low band gap Il-T3:PC
71
BM blend films by blade-slit coating
method and measuring points by surface profiler
dichlorobenzens) as described in Table
6
. As another example, uniform film of a
low band gap polymer iL-T3 (10 mg iI-T3 [
9
] and 15 mg PC
71
BM in 1.0 g di-
chlorobenzens) coated by the blade-slit coating is also shown in Table
6
and
Fig.
22
. The thickness data were measured at nine given positions shown in
Fig.
22
over the coated area of 50 mm 9 75 mm. Furthermore, the film quality by
the blade-slit coating is better than that by spin-coating as shown in Fig.
23
. Since
the surface quality of the film can affect the device performance such as shunt
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