Regioregular Oligomer and Polymer Containing Thieno[3,4-b]thiophene Moiety for Efficient Organic Solar Cells

Autor:	Luping Yu, Lin X. Chen, Jodi M. Szarko, Jianchang Guo, Danqin Feng, Claire Ray, Yongye Liang
Rok vydání:	2009
Předmět:	Materials science Polymers and Plastics Organic solar cell Organic Chemistry Hybrid solar cell Acceptor Oligomer Polymer solar cell law.invention Inorganic Chemistry chemistry.chemical_compound chemistry law Polymer chemistry Solar cell Materials Chemistry Thiophene Moiety
Zdroj:	Macromolecules. 42:1091-1098
ISSN:	1520-5835 0024-9297
DOI:	10.1021/ma8023969
Popis:	A regioregular conjugated oligomer (MF) and its polymer counterpart (PF) containing a thieno[3,4-b]thiophene moiety have been developed. The existence of thieno[3,4-b]thiophene extends the absorption of the molecules to longer wavelengths and increases the current density of solar cell devices using these materials. The regioregularity of the polymers from the incorporation of regioregular oligothiophene fragments also enhances hole mobility. Consequently, the polymers show higher solar energy conversion efficiencies in bulk heterojunction (BHJ) solar cells than the low molecular weight oligomers. Spectroscopic and structural studies reveal that composite films prepared from the polymer exhibit a larger charge carrier density and smaller domain sizes for the electron donor and acceptor than the oligomer counterpart. These results rationalize the origin for the higher solar cell efficiency.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3351f8e6438251e8014937a600191239 https://doi.org/10.1021/ma8023969 Zobrazit plný text záznamu