title: Improvement of quantum efficiency of P3HT:PCBM-based organic photovoltaic cells using DMDCNQI as an N-type dopant and buffer layer.
abstract: In previous work, we have reported that a P3HT:PCBM-based organic photovoltaic cell using a thermally evaporated DMDCNQI buffer layer shows a high power conversion efficiency. In the present work, we have fabricated organic photovoltaic cells consisting of ITO/PEDOT:PSS/P3HT:PCBM:DMDCNQI/DMDCNQI/Al using an all-solution process. A thin, uniform DMDCNQI film was obtained in a methanol solution with high solubility and low viscosity. The prepared device shows a high power conversion efficiency of 2.9%. In particular, a maximum external quantum efficiency of 81% was obtained.
authors.affiliation: Department of Chemical and Biomolecular Engineering, Sogang University, Seoul 121-742, Republic of Korea.
authors.forename: Joo Hyung
authors.initials: JH
authors.lastname: Lee
authors.forename: Eui Yeol
authors.initials: EY
authors.lastname: Yang
authors.forename: Se Young
authors.initials: SY
authors.lastname: Oh
mesh_terms: D002021:Buffers; D011789:Quantum Theory; D013053:Spectrophotometry
chemical_list: D002021:Buffers