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Journal of Biotechnology and Phytochemistry

Volume 1 Issue 3

Chemistry World 2017

Notes:

Page 50

November 13-15, 2017 Athens, Greece

World Congress on

Chemistry

Astudy of fluorine substitution on solution processable

benzo [1, 2, 5] thiadiazole based copolymers for

optoelectronic applications

Amira Abouhadid

Texas A&M University, Qatar

olymer solar cells (PSCs) have attracted great attention

in recent years due to their advantages of low cost,

light-weight, easy fabrication and capability to be fabricated

into large area flexible devices. Herein, we designed and

synthesized a series of four novel thermally stable low- band-

gap (LBG) conjugated polymers (P1-P4) based on benzo

[1,2,5] thiadiazole (BT) as a building block. BT is well known

electron-withdrawing unit which has been sandwiched with

two electrons donating octylthiophene units; a monomer

in this designed polymer series. We copolymerized with

various fluorinated and non-fluorinated BT in order to

compare optoelectronic properties. The thermal stability of

the polymers is studied by differential scanning calorimetry

(DSC) and thermogravimetric analysis (TGA). Optical

properties of the polymers are measured by UV-Visible

spectrophotometer. Theoretical calculations (DFT studies)

and electrochemical cyclic voltammetry (CV) measurement

suggested that the fluorine atom could decrease the molecular

energy levels highest occupied molecular orbital and lowest

unoccupied molecular orbital (HOMO and LUMO) of the

resulting polymers distinctly. Presence of fluorine atom in the

conjugated backbone tunable optoelectronic properties could

be expected. Moreover, we discuss the effect of the fluorine

atom on the absorption spectra, crystalline properties,

hole mobilities, and blend morphologies of the conjugated

polymers.

Biography

Amira Abouhadid is an undergraduate is Chemical Engineering student at

Texas A&M University at Qatar.

Amira Abouhadid, J Biotech and Phyto 2017

Figure 1.

benzo [1,2,5] thiadiazole based conjugated polymers