Effect of Solvent Additives and P3HT on PDTSTTz/PCBM Based Bulk Heterojunction Solar Cells
No Thumbnail Available
Date
2013-05
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Addis Ababa University
Abstract
The dcpcndcncy o fthc performance of organic bulk heteroj uct ion (B HJ) so lar cell s on
the nanomorphology of the photoactive blend can be co ntro lled by so lvent additi ves.
In this work BI-IJ so lar cells ba sed on PDTS'ITz:PCBM (1:1) which processcd by
us ing a host solvcnt di-chl orobc nzcnc and 2.5% (v/v) different solvent add iti ves such
as iodobutane, iodoethane, di-iodometha ne. and iodomcthane were constructed. The
effects of the aforementioned addit ives on the photovolta ic parametcrs of the so lar
cells wcre in vcstigated. Deviccs processed in 2.5% (v/v) of iodobutanc cx hibited the
hi ghest power convers ion e fTI cicncy (PCE) up to 2.02% as compared to the pri st ine
PDTST f z:PCBM deviccs (without add itive) (0.39%). The UY-Yis absorption
spectra of films showed the existence of red shift in th c prcsence of thcse addi tivcs
res ulting from thc growth of enhanced local structure with d istinct, opt imized phase
scpa ratcd morph ology. Bcsides, the introduction of P3HT donor into
PDTSTTzlPCBM system forming a ternary bl end a lso showed improvcd cfficicncy
(2.42%) following thc incrcascd sho rt ci rcu it current up to 11.08 mi\/cm' through
improvcd photon harvesting.
KEYWORDS - Organic Solar Cell, Additi ve, Morphology, Bulk Il eterojunction
Description
Keywords
Organic Solar Cell, Additive, Morphology, Bulk Heterojunction