Low-Cost Fabrication of Organic Photovoltaics and Polymer LEDs - Low-cost Nanomaterials: Toward Greener and More Efficient Energy Applications - page 257

Fig. 34 The device structure of the inverted TME solar cell for a P3HT:PCBM bulk

heterojunction. b PIDT-phanQ:PCBM bulk heterojunction

Fig. 35 J-V characteristics of organic solar cells fabricated using different transparent metal
electrodes. a P3HT:PCBM BHJ inverted cells with Al TME/PH500, Al TME/PH1000, and Ag
TME/PH500. b PIDT-phanQ:PC71BM BHJ inverted cells with ITO glass/PH500, Al TME/
PH500 and Ag TME/PH500

used to fabricate the solar cells. MoO 3 and silver were deposited sequentially for
the anode formation.
To compare the performance of the TME substrates for organic solar cell
application two PEDOT:PSS materials with different conductivity, pristine PH500
r = 0.2 S/cm) and PH1000 (r = 0.4 S/cm) purchased from HC Starck, were used
to compare the performance of Al and Ag TME electrodes. The current density
versus voltage characteristics are shown in Fig. 35 . The figures of merits are
summarized in Table 13 . When we compare the P3HT:PC 61 BM BHJ device with
Al TME and Ag TME (Table 13 ), the OPV with Ag TME showed superior per-
formance than Al TME due to the higher conductivity of Ag. In Table 14 , the Ag
TME-based OPV devices were compared with ITO based OPV devices for the
PIDT-phanQ:PC 71 BM BHJ system. The OPV with Ag TME showed the best
performance with higher current density and fill factor compared to the OPV with