Development of P and N type donor acceptor conjugated polymers for electrochromic and organic solar cell applications /

Akbaşoğlu Ünlü, Naime
Donor-acceptor (D-A) approach is highly efficient to obtain p-type and n-type materials with desired intrinsic optical and electrochemical properties. Therefore, in this study a series of p-type and n- type DA type conjugated polymers was synthesized with combination of electron donating and electron-withdrawing heterocyclics to understand the effects of structural modifications on electrochemical, optoelectronic and photovoltaic properties. Synthesized polymers were utilized for electrochromic and organic solar cell applications. Conjugated polymers were synthesized either electrochemical or chemical methods. Syntheses of p-type DA polymers were performed vi from the coupling reaction of benzotriazole with different donor units, i.e, furan, thieno[3,2-b]thiophene, dithienopyrrole, benzodithiophene. Donor units in molecular design are either used directly to couple with BTz or inserted as π-bridging segments to discuss their effect on optical, electrochemical, electrochromic, and optoelectronic properties. N-type conjugated polymers were developed by NDI and ladder type indacenodithiophene (IDT) and indacenodiselenophene (IDSe) units. N-type conjugated polymers were utilized for all polymer solar cell applications to replace fullerene in bulk heterojunction organic solar cell fabrication. Morphological and light intensity dependent photovoltaic studies were conducted that elucidate the possible loss mechanism in the related solar cells.


Syntheses of new multifunctional donor acceptor type polymers for electrochromic and organic solar cell applications /
Özdemir Hacıoğlu, Şerife; Toppare, Levent Kamil; Department of Chemistry (2016)
Combining donor and acceptor moieties in the polymer backbone enhances D–A interactions and helps in developing the most efficient polymers for various applications. Besides obtaining low band gap polymers, the D–A approach is also useful in producing polymers with improved optical, mechanical and electronic properties. Changing both or either of the donor/acceptor groups is an effective method to design these alternating systems. For this purpose different acceptors units such as; benzothiodiazole, benzotr...
The Combination of benzotriazole and n-functionalized 2,5-di(2-thienyl)-1h-pyrrole units to investigate the electrochromic properties of conjugated polymers
Rende, Eda; Çırpan, Ali; Department of Chemistry (2013)
Synthesis of new conducting polymers is desired since their electrochemical and optical properties enable them to be used as active layers in many device applications. Benzotriazole and nfunctionalized 2,5-di(2-thienyl)-1h-pyrrole (SNS Series) containing polymers showed very promising results as electrochromic materials. In order to observe the effect of the combination of these two units three new monomers 2-(6-(2,5-bis(5-methylthiophen-2-yl)-1H-pyrrol-1-yl)hexyl)-4,7-di(thiophen-2- yl)-2H-benzo[d][1,2,3]t...
Synthesis of novel diketopyrrole and selenophene containing nir absorbing polymers and their application in bulk-heterojunction solar cells
Öklem, Gülce; Günbaş, Emrullah Görkem; Department of Polymer Science and Technology (2017)
DPP-based conjugated polymers are recently used in organic light emitting diodes, electrochromic devices, organic field effect transistor and organic solar cell applications. Their advantageous properties, such as broad optical absorption in Near Infra Red (NIR) region, high charge carrier mobility and good film forming ability make them an excellent choice for generation of highly efficient solar cells. In this thesis, using donor-acceptor approach (D-A) we aimed to synthesize novel polymers with furan bas...
Syntheses and optoelectronic applications of thiadiazolo quinoxaline bearing alternating conjugated copolymers
Ataoğlu, Emre; Çırpan, Ali; Ünalan, Hüsnü Emrah; Department of Polymer Science and Technology (2016)
Donor-acceptor type conjugated polymers containing thiadiazolo quinoxaline and benzodithiophene derivatives were used as photoactive material for organic solar cell. The alkoxy- substituted benzo[1,2-b;4,5-b’]dithiophene (BDT) monomer, 2,6bis(trimethyltin)-4,8-di(2-ethylhexyloxyl)benzo[1,2-b;4,5-b’]dithiophene, was polymerized with 4,9-dibromo-[1,2,5]thiadiazolo[3,4-g]quinoxaline through a Pd(0)catalyzed Stille coupling reaction. In order to improve the interchain interactions between polymer chains, an alk...
Synthesis, spectroscopic and electrochemical studies of perylene containing conjugated copolymers
Bayseç, Şebnem; Toppare, Levent Kamil; Yılmaz, Levent; Department of Polymer Science and Technology (2013)
The synthesis , spectroscopic and electrochemical properties of a series of donor-acceptor (DA) type polymers by changing the donor unit (thiophene, dithienopyrrole) polymer backbone were investigated.The synthesized CoP1 and CoP2 were designed to investigate the effect of copolymerization and insertion of perylene tetracarboxylic dimide (PDI) on the structure of benzotriazole (BTz) based polymers. For CoP1 1,7-dibromo-perylene diimide,4,7-dibromo-2-dodecyl-2H-benzo[d][1,2,3]triazole and 2,5 bis(tributylsta...
Citation Formats
N. Akbaşoğlu Ünlü, “Development of P and N type donor acceptor conjugated polymers for electrochromic and organic solar cell applications /,” Ph.D. - Doctoral Program, Middle East Technical University, 2015.