Design and Synthesis of Novel Pyrene Discotics and Their Investigation in Organic Photovoltaic Cells Bilal R. Kaafarani, Department of Chemistry, American University of Beirut, Beirut, Lebanon
N
X
X
N
X
N
X
3a. X = H 3b. X = t-Bu
X
N
X
4a. X = H 4b. X = t-Bu Experiment
Theory
E1/2+/0
E1/2+2/+
ΔE1/2
λonset
Egopt
IPs
EAs
IPvert
IPadi
IPKT
EAKT
IPKT–EAKT
(V)
(V)
(mV)
(nm)
(eV)
(eV)
(eV)
(eV)
(eV)
(eV)
(eV)
(eV)
3b
+0.60
+0.74
148
370
3.35
5.4
2.1
5.99
5.92
5.02
1.19
3.83
4b
+0.72
+0.80
104
358
3.46
5.5
2.1
6.11
6.06
5.14
1.87
3.27
Cpd
ITO/PEDOT:PSS/3a,3b/TPBi/Ca/Al
ITO/PEDOT:PSS/4a,4b/TPBi/Ca/Al 12
12
4 2
400 500 600 wavelength (nm)
100
-4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10 bias (V)
8 6 4 2
1000
norm. EL.
2
200
2
300
0
0
current density (kA/m )
6
1200
4a 4b 2 at 1,11kA/m
10
luminance (cd/m )
8
400
norm. EL.
2
current density (kA/m )
10
3a 3b 2 at 1.11kA/m
400
500 600 wavelength (nm)
800 600 400
700
200 0
0 -4 -3 -2 -1
0
1
2
3
bias (V)
4
5
6
7
8
2
X
luminance (cd/m )
X
