| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 79311 | Solar Energy Materials and Solar Cells | 2012 | 8 Pages |
Organic photovoltaic cells (OPVs) with a conductivity enhanced by doping with either dimethylsulfoxide (DMSO) or ethylene glycol (EG) were successfully fabricated to increase the photon harvesting property through localized surface plasmon resonance (LSPR) by adding Au nanoparticles to PH500, a hole collection layer, and effectively separating the generated charges. At Au nanoparticle and DMSO doping concentrations of 20 wt% and 1 wt%, respectively, the characteristics of the OPVs were optimized with a short-circuit current density (Jsc), open-circuit voltage (Voc), fill factor (FF) and estimated power conversion efficiency (PCE) of 8.0 mA/cm2, 0.595 V, 57.8% and 2.6%, respectively. Compared to the device with a buffer layer of conventional PEDOT:PSS, PCE was improved by ca. 85%. The series resistance (Rs), shunt resistance (Rsh), and hole mobility were 18 Ω cm2, 673 Ω cm2 and 4.2 cm2/Vs, respectively.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► The photon harvesting property is enhanced by introducing an Au nanoparicles in the buffer layer. ► To improve the conductivity of the buffer layer, DMSO and EG are added. ► Compared to the device with a buffer layer of conventional PEDOT:PSS, PCE was improved by ca. 85%. ► The Rs and Rsh were 18 Ω cm2 and 673 Ω cm2, respectively.
