A master thesis from Aalborg University
Novel BDT-difluorophenyl polymers for organic photovoltaics
[Nyskabende BDT-Difluorophenyl baseret polymer til brug i organiske solceller]
Author(s)
Term
4. Term
Education
Publication year
2016
Submitted on
2016-05-30
Pages
65 pages
Abstract
Dette projekts mal var at syntesisere en nytnkt BDT-baseret donor-acceptor (D-A) copolymer som indeholder di uorophenyl og sa at fremstille organiske fotovoltaiske celler for sa at karakterisere deres egenskaber. Den celle der havde hjest eektivitet formaede at levere 8% PCE. Cyklisk voltammetri, UV-Vis og AFM blev brugt til at undersge karak- teristikkerne pa de mest interessante solceller. Udover den nytnkte uor indholdende poly- mer, sa blev der polymeriseret 4 polymerer, ud fra kendte monomerer. Disse var 2 donorer, med furan eller thiophen ringe bundet til BDT rygraden, og de 2 acceptorer er velkendte og nemt tilgngelige. Disse 4 polymerer blev syntetiseret for at undersge indvirkningen af at den eneste forskel mellem 2 polymerer er om det er et svovl eller et oxygen atom der sidder forgrenet ud fra rygraden. Den svovlholdige polymer viste sig at vre vsentlig bedre end den oxygenholdige modpart.
This project aimed to synthesize a novel BDT- based donor-acceptor (D-A) copolymer con- taining di uorophenyl, and to make organic photovoltaic devices and characterise these. The highest PCE obtained was 8%. CV, UV- VIS and AFM was performed to study the characteristics of the devices more in depth. In addition to the novel polymer, four poly- mers were synthesised based on two acceptors and two donors, the donors having either fu- ran or thiophene branching out from the BDT backbone. These were used for devices to study the impact of exchanging oxygen for sul- phur in the aromatic system of the polymer. The thiophene containing polymer proved to outperform the furan containing polymer.
Keywords
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