High‐Performance Organic Photovoltaic Devices Using a New Amorphous Molecular Material with High Hole Drift Mobility, Tris[4‐(5‐phenylthiophen‐2‐yl)phenyl]amine

Abstract

A new amorphous molecular material, tris[4‐(5‐phenylthiophen‐2‐yl)phenyl]amine (TPTPA), is synthesized and characterized. TPTPA forms a stable amorphous glass with a glass‐transition temperature of 83 °C when the melt sample is cooled. It also forms amorphous thin films by a thermal deposition technique. TPTPA exhibits a hole drift mobility of 1.0 × 10−2 cm2 V−1 s−1 at an electric field of 1.0 × 105 V cm−1 and at 293 K, as determined by the time‐of‐flight method, which is of the highest level among those of amorphous molecular materials. pn‐Heterojunction organic photovoltaic devices (OPVs) using TPTPA as an electron donor and C60 or C70 as an electron acceptor exhibit high performance with fill factors of 0.66∼0.71 and power conversion efficiencies of 1.7∼2.2% under air‐mass (AM) 1.5G illumination at an intensity of 100 mW cm−2, which are of the highest level ever reported for OPVs using amorphous molecular materials.

Anti‐reflection and hydrophobic characteristics of M‐PDMS based moth‐eye nano‐patterns on protection glass of photovoltaic systems

“…In order to confirm the durability of the nano-patterns, the patterned glass with HDFS based SAM coating was soaked in sulfuric acid solution with pH value of 2.0 for 48 h. During the summer season, the temperature of the photovoltaic system can easily rise to 70-808C. Thus, the durability test with respect to temperature was carried out in a convection oven at 1208C for 48 h. The patterned glass with HDFS based SAM coating was exposed to about 300 mJ/cm 2 of UV light, which is equivalent to approximately 60 times of AM 1.5G condition, for 40 h because UV can degrade and decompose polymeric materials [22]. Figure 3 shows the effects of the moth-eye nano-patterns on the transmittance and contact angle.…”

Star-shaped conjugated systems derived from thienyl-derivatized poly(triphenylamine)s as active materials for electrochromic devices

“…Compare to the k max of the structurally similar monomers reported in the literature, the k max of TTPA monomer exhibits a 56 nm red shift compare to that of triphenylamine (TPA, 299 nm) and a 39 nm blue shift to that of tris[4-(5-phenylthiophen-2-yl)phenyl]amine (TPTPA, 394 nm) [23].…”

Periodic multivariate normal hidden markov models for the analysis of water quality time series

“…In order to confirm the durability of the nano‐patterns, the patterned glass with HDFS based SAM coating was soaked in sulfuric acid solution with pH value of 2.0 for 48 h. During the summer season, the temperature of the photovoltaic system can easily rise to 70–80°C. Thus, the durability test with respect to temperature was carried out in a convection oven at 120°C for 48 h. The patterned glass with HDFS based SAM coating was exposed to about 300 mJ/cm 2 of UV light, which is equivalent to approximately 60 times of AM 1.5G condition, for 40 h because UV can degrade and decompose polymeric materials 22.…”