Title :
Organic solar cells with a blend of two solution processable electron acceptors, C60(CN)2 and PCBM
Author :
Koppolu, Vaishali R. ; Gupta, Mool C. ; Bagienski, Will ; Shen, Yang ; Shu, Chunying ; Gibson, Harry W. ; Dorn, Harry C.
Author_Institution :
Charles Brown Dept. of Electr. & Comput. Eng., Univ. of Virginia, Charlottesville, VA, USA
Abstract :
Organic solar cells based on bulk heterojunction (BHJ) structure fabricated by blending conjugated polymers with fullerenes have resulted in great improvements in the energy conversion efficiencies in recent years. PCBM ([6,6]-phenyl-C61-butyric acid methyl ester), a fullerene derivative, has been extensively investigated as a solution processable electron acceptor for BHJ photovoltaic devices blended with conjugate polymers like P3HT [poly(3-hexylthiophene)]. We investigated a novel solution processable organic semiconductor, C60(CN)2 as an electron acceptor and blends with PCBM for BJH photovoltaic applications . The effect of ratios of PCBM and C60(CN)2 on the optical absorption spectra, open circuit voltage, short circuit current, fill factor, efficiency and morphology is investigated. Thermal annealing has shown a significant improvement in the device performance.
Keywords :
annealing; conducting polymers; fullerene compounds; organic semiconductors; polymer blends; semiconductor heterojunctions; solar cells; BHJ photovoltaic devices; C60(CN)2; P3HT; PCBM; [6,6]-phenyl-C61-butyric acid methyl ester; bulk heterojunction structure; conjugated polymer blending; energy conversion efficiency; fill factor; fullerene derivative; open circuit voltage; optical absorption spectra; organic solar cells; poly(3-hexylthiophene); short circuit current; solution processable electron acceptor; solution processable organic semiconductor; thermal annealing; Absorption; Circuits; Electron optics; Energy conversion; Heterojunctions; Organic semiconductors; Photovoltaic cells; Photovoltaic systems; Polymers; Solar power generation;
Conference_Titel :
Photovoltaic Specialists Conference (PVSC), 2009 34th IEEE
Conference_Location :
Philadelphia, PA
Print_ISBN :
978-1-4244-2949-3
Electronic_ISBN :
0160-8371
DOI :
10.1109/PVSC.2009.5411243
