Photovoltaic Properties of Poly(Carbazolyl-2,7-vinylene) Derivatives by Optimization of Cathode Structures

Abstract

The novel π-conjugated polymer, poly[N-(3,4-bis(decyloxy)phenyl)carbazolyl-2,7-vinylene)-co-{2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene}] (PCzV-co-MEH-PPV) was synthesized by using the Gilch polymerization method and used for the fabrication efficient photovoltaic cells. Bulk heterojunction photovoltaic cells, ITO/PEDOT:PSS/polymer:PC₆₁BM (1:3, 1:4, 1:5 and 1:6 wt/wt)/Ca/Al configurations, were fabricated by blending of the PCzV-co-MEH-PPV with the fullerene derivative [6,6]-phenyl C61 butyric acid methyl ester (PCBM) were found to have a power conversion efficiency > of up to 1.33%, measured using an AM 1.5 G solar simulator at 100 mW/cm² light illumination.

Keywords:

• Poly[N-(3,4-bis(decyloxy)phenyl)carbazolyl-2,7-vinylene)-co-{2-meth oxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene}]
• Bulk-heterojunction solar cell
• Gilch polymerization
• π-Conjugated polymers
• PCBM

Acknowledgment

This work was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) grant funded from the Ministry of Education, Science and Technology (MEST) (No. M10600000157-06J0000-15710) and the cooperative R&D Program funded by the Korea Research Council Industrial Science and Technology, Republic of Korea.