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Synthesis and Characterization of Phenothiazine-Isoindigo Copolymers for Photovoltaic Applications
Synthesis and Characterization of Phenothiazine-Isoindigo Copolymers for Photovoltaic Applications
Bulletin of the Korean Chemical Society. 2014. Jun, 35(6): 1875-1878
Copyright © 2014, Korea Chemical Society
  • Received : December 25, 2013
  • Accepted : February 19, 2014
  • Published : June 20, 2014
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About the Authors
Fuzhen Lyu
Hanok Park
Soo-Hyoung Lee
Youn-Sik Lee

Abstract
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Experimental
Synthesis. Synthetic procedures for compound 1-3, PPT-II, and PPT-T-II are described in the supporting information.
Measurements. Instruments employed for characterization of the polymers are described in the supporting information.
Fabrication of the Photovoltaic Device. Photovoltaic devices were fabricated with the configuration of ITO/PEDOT:PSS/PPT-II: PC 71 BM/LiF/Al (active area of 9 mm 2 ). Patterned ITO glasses (2 × 2 cm) were cleaned ultrasonically in DI water, acetone and isopropyl alcohol, and then treated with UV light and ozone. PEDOT:PSS was spin-coated onto the ITO glass and dried at 90 °C for 20 min under nitrogen. A blend of PPT-II and PC 71 BM in o -dichlorobenzene was spin-coated onto the PEDOT: PSS layer for 40 s at 700 rpm. LiF (0.5 nm) and Al (100 nm) layers were deposited via thermal evaporation under vacuum (1 × 10 −6 torr). The current density-voltage ( J-V ) characteristics of photovoltaic devices were measured in the dark and in white light illumination using an AM 1.5G solar simulator (Newport) at 100 mW/cm 2 , adjusted with a standard PV reference cell, (2 × 2 cm monocrystalline silicon solar cell calibrated at NREL, Color-ado, USA) with a Keithley 2400 source-measurement unit. The external quantum efficiency (EQE) was measured using a Polaronix K3100 spectrometer.
Acknowledgements
Supporting Information.Synthetic procedures and spectral data are available free of charge on the Web at http://www.csj.jp/journals/bcsj/.
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