132
4 Applications of Nitrile Imine Derivatives
N N
NO 2
N
N
O 2 N
OC 8 H 17
C 8 H 17 O
C 8 H 17 O
OC 8 H 17
OC 8 H 17
C 8 H 17 O
N N
NO 2
N
N
O 2 N
OC 8 H 17
C 8 H 17 O
C 8 H 17 O
OC 8 H 17
OC 8 H 17
C 8 H 17 O
*
N N
NO 2
N
N
O 2 N
OC 8 H 17
C 8 H 17 O
C 8 H 17 O
OC 8 H 17
OC 8 H 17
C 8 H 17 O
*
*
N N
NO 2
N
N
O 2 N
OC 8 H 17
C 8 H 17 O
C 8 H 17 O
OC 8 H 17
OC 8 H 17
C 8 H 17 O
+
+
- 
- 
h
energy transfer
energy transfer
e
- transfer
e
- transfer
Scheme 4.38 The photophysical and photochemical relaxation pathway of an OPV-linked
[60]fullerene dimer
species fluorene and APFO-Green1 [126]. The resulting photovoltaic material exhibited highly encouraging results in the infra-red region in particular, with an overall
photocurrent density of 1.76 mA/cm
2 , an open-circuit voltage of 0.54 V and a power
conversion efficiency of 0.3% achieved. This research was further advanced through
the synthesis of an alternative photovoltaic via cycloaddition between the OPV-bis–
NI and two equivalents of [70]fullerene. The resulting solar cell afforded an improved