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

Download

index.pdf

Date

2015

Author

Akbaşoğlu Ünlü, Naime

Metadata

Show full item record

Item Usage Stats

365
views

366
downloads

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.

Subject Keywords

Electrochromic devices., Electrooptical devices., Conjugated polymers., Conducting polymers., Solar cells.

URI

http://etd.lib.metu.edu.tr/upload/12619259/index.pdf
https://hdl.handle.net/11511/25180

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

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...
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...
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 and characterization of conjugated polymers with polyhedral oligomeric silsesquioxane pendant groups Ertan, Salih; Kaynak, Cevdet; Cihaner, Atilla; Department of Polymer Science and Technology (2017) In this thesis, a series of monomers covalently bonded to polyhedral oligomeric silsesquioxane (POSS) pendant group was designed and synthesized. POSS group is a hybrid organic-inorganic nanostructure with 1 to 3 nm diameter. POSS which has a cage structure is mainly composed of silicon (Si) (at vertices) and oxygen (O) (in the middle of the edge). POSS nanostructure can be modified through the vertices with organic functional groups. POSS groups provide different properties, such as thermal robustness, mec...

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.