The Effects of Fluorine-Contained Molecules on Improving the Polymer Solar Cell by Curing the Anomalous S-Shaped I–V Curve

Abstract

In this study, we investigate the effects of fluorinated poly(3,4-ethylene dioxythiophene):poly(styrenesulfonate) buffer layer on the performance of polymer photovoltaic cells. We demonstrate for the first time, the deterioration of the device performance can be effectively mended by modifying the interface between the active layer and buffer layer with heptadecafluoro-1,1,2,2-tetra-hydro-decyl trimethoxysilane (PFDS) and perfluorononane. Device performance shows a substantial enhancement of short-circuit current from 7.90 to 9.39 mA/cm(2) and fill factor from 27% to 53%. The overall device efficiency was improved from 0.98% to 3.12% for PFDS modified device. The mechanism of S-shape curing is also discussed. In addition, the stability of modified devices shows significant improvement than those without modification. The efficiency of the modified devices retains about half (1.88%) of its initial efficiency (4.1%) after 30 d compared to the unmodified ones (0.61%), under air atmosphere.

Improving the Performance of Blue Polymer Light-Emitting Diodes Using a Hole Injection Layer with a High Work Function and Nanotexture

“…Compared with a contact angle of ∼11° on a pristine PEDOT:PSS layer, the contact angles of p -xylene (the solvent of PPF-SO25) onto the PFI-bearing HILs dramatically increased to 46 ± 3°, as shown in Table and Figure S1 of the Supporting Information (SI). The PFI enrichment on the surface increased the hydrophobicity due to the hydrophobic nature of the fluorinated polymer, which caused dewetting of the PPF-SO25 solution during the spin-coating process, , thus limiting us to fabricate a device to compare the EL performances of devices before and after the alcohol rinsing of these HILs. To improve the PPF-SO25 solution wettability, we carried out an alcohol rinsing treatment to modify the surface of the PFI-containing HILs.…”

One-Step Synthesis of Antioxidative Graphene-Wrapped Copper Nanoparticles on Flexible Substrates for Electronic and Electrocatalytic Applications

“…Metal nanoparticles with unique electrical and catalytic properties attracted vast attention in the past decades and have been used for a variety of applications, such as the electrodes for field-effect transistors, organic solar cells, surface-enhanced Raman scattering, , and hydrogen evolution reactions (HER) . In particular, the noble metals, such as gold (Au) and platinum (Pt), have drawn enormous interest due to their high electrical conductivity, excellent oxidation resistivity and prominent electrochemical activity .…”