Semiconducting copolymers comprising benzodithiophene and benzotriazole derivatives for organic photovoltaic cells

Title
Semiconducting copolymers comprising benzodithiophene and benzotriazole derivatives for organic photovoltaic cells
Authors
이진균
Keywords
Organic photovoltaic deviceBenzotriazoleOrganic thin film transistors
Issue Date
2013
Publisher
SYNTHETIC METALS
Series/Report no.
SYNTHETIC METALS; vol.179 startpage 18 endpage 26
Abstract
Semiconducting polymers of benzodithiophene and benzotriazole derivatives were synthesized fororganic photovoltaic cells (OPVs). 4,7-Dibromo-2-(heptadecan-9-yl)-2H-benzo[d][1,2,3]triazole (BTz)was used as the acceptor monomer, whereas either 2,6-bis(trimethyltin)-benzo[1,2-b:4,5-b ]dithiophene(BDT) or 2,6-bis(trimethyltin)-4,8-bis(triisopropylsilylethynyl)-benzo[1,2-b:4,5-b ]dithiophene (TIPS-BDT) was used as the donor monomer to give poly{benzo[1,2-b:4,5-b ]dithiophene-alt-2-(heptadecan-9-yl)-2H-benzo[d][1,2,3]triazole} (PBDT-BTz) and poly{4,8-bis(triisopropylsilylethynyl)benzo[1,2-b:4,5-b ]dithiophene-alt-2-(heptadecan-9-yl)-2H-benzo[d][1,2,3]triazole} (PTIPSBDT-BTz), respectively. Thepolymers were characterized by thermogravimetric analysis (TGA), UV?vis absorption, electrochemicalcyclic voltammetry, X-ray diffraction analysis, hole mobility in organic thin film transistor (OTFTs), andphotovoltaic measurements. Bulk hetero junction photovoltaic devices were fabricated using polymerswith [6,6]-phenyl C71-butylic acid methyl ester (PC71BM) as the electron acceptor. Devices fabricatedusing PTIPSBDT-BTz showed the maximum power conversion efficiency (PCE) of 4.16% with an open-circuit voltage of 0.86 V, a short-circuit current of 10.48 mA/cm2, and a fill factor of 0.46, measured underair mass (AM) 1.5 global (1.5 G) illumination conditions (100 mW/cm2).
URI
http://dx.doi.org/10.1016/j.synthmet.2013.07.007
http://dspace.inha.ac.kr/handle/10505/31888
ISSN
0379-6779
Appears in Collections:
College of Engineering(공과대학) > Polymer Science and Engineering (고분자공학) > Journal Papers, Reports(고분자공학 논문, 보고서)
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