title: Highly efficient hybrid thin-film solar cells using a solution-processed hole-blocking layer.
abstract: We report the origin of the improvement of the power conversion efficiency (PCE) of hybrid thin-film solar cells when a soluble C(60) derivative, [6,6]-phenyl-C(61)-butyric acid methyl ester (PCBM), is introduced as a hole-blocking layer. The PCBM layer could establish better interfacial contact by decreasing the reverse dark-saturation current density, resulting in a decrease in the probability of carrier recombination. The PCE of this optimized device reached a maximum value of 8.34% and is the highest yet reported for hybrid thin-film solar cells.
authors.affiliation: Advanced Functional Thin Films Department, Korea Institute of Materials Science, Changwon, 641-831, Republic of Korea.
authors.forename: Ji Hoon
authors.initials: JH
authors.lastname: Seo
authors.forename: Dong-Ho
authors.initials: DH
authors.lastname: Kim
authors.forename: Se-Hun
authors.initials: SH
authors.lastname: Kwon
authors.forename: Yun Chang
authors.initials: YC
authors.lastname: Park
authors.forename: Hyung Hwan
authors.initials: HH
authors.lastname: Jung
authors.forename: Hyung Woo
authors.initials: HW
authors.lastname: Lee
authors.forename: Jung-Dae
authors.initials: JD
authors.lastname: Kwon
authors.forename: Sung-Gyu
authors.initials: SG
authors.lastname: Park
authors.forename: Kee-Seok
authors.initials: KS
authors.lastname: Nam
authors.forename: Yongsoo
authors.initials: Y
authors.lastname: Jeong
authors.forename: Seung Yoon
authors.initials: SY
authors.lastname: Ryu
authors.forename: Jae-Wook
authors.initials: JW
authors.lastname: Kang
authors.forename: Chang Su
authors.initials: CS
authors.lastname: Kim