Performance Improvement of Polymer Solar Cells by Surface-Energy-Induced Dual Plasmon Resonance

• DOI: 10.1021/acsami.6b00297
• Publication Date: 2016-02-22T14:35:49Z
• Authors: Mengnan Yao; Ping Shen; Yan Liu; Boyuan Chen; Wenbin Guo; Shengping Ruan; Liang Shen
• Keywords: Localized surface plasmon

The surface plasmon resonance (SPR) effect of metal nanoparticles (MNPs) is effectively applied on polymer solar cells (PSCs) to improve power conversion efficiency (PCE). However, universality the reported results mainly focused utilizing single type MNPs enhance light absorption only in specific narrow wavelength range. Herein, a surface-energy-induced dual MNP by thermally evaporating method was presented achieve enhancement wider differences energy between silver (Ag), gold (Au), and tungsten trioxide (WO3) compared contact angle images enable Ag Au prefer respectively aggregate into isolated islands rather than films at initial stage evaporation process, which clearly demonstrated atomic force microscopy (AFM) measurement. sum plasmon-enhanced range induced both NPs (350–450 nm) (450–600 almost cover whole spectra active layers, compatibly contribute significant improvement from 4.57 ± 0.16 6.55 0.12% one without MNPs. Besides, steady state photoluminescence (PL) measurements provide strong evidence that SPR Ag–Au increase intensity absorption. Finally, ultraviolet photoelectron spectroscopy (UPS) reveals doping causes upper shift work function valence band WO3, directly related hole collection ability. We believe simple technique might pave way toward higher-efficiency PSCs.