title: Inverted polymer solar cells with amorphous indium zinc oxide as the electron-collecting electrode.
abstract: We report on the fabrication and performance of polymer-based inverted solar cells utilizing amorphous indium zinc oxide (a-IZO) as the electron-collecting electrode. Amorphous IZO films of 200 nm thickness were deposited by room temperature sputtering in a high-purity argon atmosphere. The films possessed a high optical transmittance in the visible region (≥ 80%), a low resistivity (3.3 × 10⁻⁴ Ωcm), a low surface roughness (root mean square = 0.68 nm), and a low work function (4.46 ± 0.02 eV). Inverted solar cells with the structure a-IZO/P3HT: PCBM/PEDOT:PSS/Ag exhibited a power conversion efficiency of 3% estimated for AM 1.5G, 100 mW/cm² illumination.
authors.affiliation: School of Electrical and Computer Engineering and Center for Organic Photonics and Electronics, 777 Atlantic Dr., Atlanta, GA 30332, USA.
authors.forename: Hyeunseok
authors.initials: H
authors.lastname: Cheun
authors.forename: Jungbae
authors.initials: J
authors.lastname: Kim
authors.forename: Yinhua
authors.initials: Y
authors.lastname: Zhou
authors.forename: Yunnan
authors.initials: Y
authors.lastname: Fang
authors.forename: Amir
authors.initials: A
authors.lastname: Dindar
authors.forename: Jaewon
authors.initials: J
authors.lastname: Shim
authors.forename: Canek
authors.initials: C
authors.lastname: Fuentes-Hernandez
authors.forename: Kenneth H
authors.initials: KH
authors.lastname: Sandhage
authors.forename: Bernard
authors.initials: B
authors.lastname: Kippelen