SUPPLEMENTARY INFO
RYodx38
Current (A)
0.0002
0.0000
-0.0002
-0.0004
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
Potential (V)
Figure1. Working electrode: Glassy Carbon (drop coating)
Counter: Pt wire
Reference: Ag/AgCl
Electrolyte : 0.1M TBAPF6 in acetonitrile (tetrabutylammonium hexafluorophosphate)
Copolymer EHOMO: -5.40 eV
Copolymer ELUMO: -2.68 eV
B
0.0003
0.0002
B
0.0001
0.0000
-0.0001
-0.0002
-0.4
-0.2
0.0
0.2
0.4
0.6
0.8
A
Figure2. Ferrocene/ 0.1M TBAPF6/AN 50mV/s
Eonset: 0.386
Instrumentation:
Cyclic voltammetry (CV) measurements were performed on a potentiostat/galvanostat model EPP4000 (Princeton Applied Research) using an Ag/AgCl reference electrode, a platinum wire counter
electrode, and a platinum foil working electrode. The working electrode was coated with a polymer
film by drop-casting a polymer solution in chloroform. CV measurements were recorded in 0.1 M
tetrabutylammonium hexafluorophosphate in dry acetonitrile at a sweeping rate of 50 mV.s -1using
ferrocene/ferrocenium (Fc/Fc+) couple as a standard. The HOMO energy levels were calculated using
the equation:
EHOMO (eV) = - (Eoxonset- EFc/Fc+onset) - 4.80 eV
where Eoxonset and EFc/Fc+onset are the onset oxidation potentials for the polymer sample and the
ferrocene against the Ag/AgCl reference electrode, while the value – 4.8 eV is the HOMO energy
level of ferrocene against vacuum1. The LUMO energy levels were calculated with the HOMO levels
obtained by CV measurements and the optical band gap (Egopt) obtained by UV-Vis measurements:
ELUMO (eV) = Egopt+ EHOMO.
0,08
a
D0
D1
D2
D3
D4
D5
D6
External (QE [%])
0,06
0,04
0,02
0,00
4
6
8
10
12
14
16
Voltage [V]
D0 with ETL
D1 with ETL
D2 with ETL
D3 with ETL
D4 with ETL
D5 with ETL
D6 with ETL
2
External (QE [%])
b
1
0
4
6
8
10
12
14
16
Voltage (V)
Figure 3. External Quantum Efficiency – Voltage graphics of the devices a) with and b) without ETL
containing QDs with different concentrations.
Reference
1. (a) M. Kumada and K. Tamao, Adv. Organomet. Chem.1968, 6, 19. (b) J. Pommerehne, H. Vestweber, W. Guss, R. F.
Mahrt, H. Bassler, M. Porsch and J. Daub, Adv. Mater. 1995, 7, 551. (c) B. W. D. Andrade, S. Datta, S. R. Forrest, P.
Djurovich, E. Polikarpov and M. E. Thompson, Org. Electron. 2005, 6, 11.