title: Plasmon resonance enhanced optical absorption in inverted polymer/fullerene solar cells with metal nanoparticle-doped solution-processable TiO2 layer.
abstract: This paper investigates the effects of localized surface plasmon resonance (LSPR) in an inverted polymer/fullerene solar cell by incorporating Au and/or Ag nanoparticles (NPs) into the TiO2 buffer layer. Enhanced light harvesting via plasmonic resonance of metal NPs has been observed. It results in improved short-circuit current density (Jsc) while the corresponding open-circuit voltage (Voc) is maintained. A maximum power conversion efficiency of 7.52% is obtained in the case of introducing 30% Ag NPs into the TiO2, corresponding to a 20.7% enhancement compared with the reference device without the metal NPs. The device photovoltaic characteristics, photocurrent properties, steady-state and dynamic photoluminescences of active layer on metal NP-doped TiO2, and electric field profile in metal NP-doped TiO2 layers are systematically investigated to explore how the plasmonic effects of Au and/or Ag NPs influence the OSC performance.
authors.affiliation: Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123, China.
authors.forename: Mei-Feng
authors.initials: MF
authors.lastname: Xu
authors.forename: Xiao-Zhao
authors.initials: XZ
authors.lastname: Zhu
authors.forename: Xiao-Bo
authors.initials: XB
authors.lastname: Shi
authors.forename: Jian
authors.initials: J
authors.lastname: Liang
authors.forename: Yue
authors.initials: Y
authors.lastname: Jin
authors.forename: Zhao-Kui
authors.initials: ZK
authors.lastname: Wang
authors.forename: Liang-Sheng
authors.initials: LS
authors.lastname: Liao