title: Improvement of photovoltaic properties by addition of a perylene compound in P3HT:PCBM BHJ system.
abstract: The synthesized n-type perylene derivative, N,N'-bis-(4-bromophenyl)-1,6,7,12-tetrakis(4-n-butoxy-phenoxy)-3,4,9,10-perylene tetracarboxdiimide (PIBr), was applied as an additive to polymer solar cells (PSCs) with P3HT [poly(3-hexylthiophene)]:PCBM [[6,6]-phenyl C61-butyric acid methyl ester] blend films. Without post thermal annealing, a considerable improvement of about 98% in power conversion efficiency was achieved by the addition of 1 wt% PIBr into a P3HT:PCBM layer, when compared with that of reference cell without the additive. The results, in combination with relevant data from UV-Vis. absorption, photoluminescence, X-ray measurements and carrier mobility studies, revealed that the addition of the perylene compound within active layer contributed to more effective charge transfer and enhanced electron mobility.
authors.affiliation: Green Energy Research Division, Daegu Gyeongbuk Institute of Science and Technology, 50-1, Dalseong-gun, Daegu 711-873, Korea.
authors.forename: Seonju
authors.initials: S
authors.lastname: Jeong
authors.forename: Sung-Ho
authors.initials: SH
authors.lastname: Woo
authors.forename: Hong-Kun
authors.initials: HK
authors.lastname: Lyu
authors.forename: Charm
authors.initials: C
authors.lastname: Kim
authors.forename: Hoyoung
authors.initials: H
authors.lastname: Kim
authors.forename: Yoon Soo
authors.initials: YS
authors.lastname: Han