RESUMO
Poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) mixed with single-wall nanotubes (SWNTs) (10:1) and doped with (0.1 M) perchloric acid (HClO4) in a solution-processed film, working as an excellent thin transparent conducting film (TCF) in organic solar cells, was investigated. This new electrode structure can be an outstanding substitute for conventional indium tin oxide (ITO) for applications in flexible solar cells due to the potential of attaining high transparency with enhanced conductivity, good flexibility, and good durability via a low-cost process over a large area. In addition, solution-processed vanadium oxide (VOx) doped with a small amount of PEDOT-PSS(PH1000) can be applied as a hole transport layer (HTL) for achieving high efficiency and stability. From these viewpoints, we investigate the benefit of using printed SWNTs-PEDOT-PSS doped with HClO4 as a transparent conducting electrode in a flexible organic solar cell. Additionally, we applied a VOx-PEDOT-PSS thin film as a hole transporting layer and a blend of PTB7 (polythieno[3,4-b] thiophene/benzodithiophene): PC71BM (phenyl-C71-butyric acid methyl ester) as an active layer in devices. Zinc oxide (ZnO) nanoparticles were applied as an electron transport layer and Ag was used as the top electrode. The proposed solar cell structure showed an enhancement in short-circuit current, power conversion efficiency, and stability relative to a conventional cell based on ITO. This result suggests a great carrier injection throughout the interfacial layer, high conductivity and transparency, as well as firm adherence for the new electrode.
RESUMO
PURPOSE: The main purpose of this study was to investigate whether judo could be practised after joint replacement. METHODS: Two hundred and twelve questionnaires were sent to Judokas licensed at the French Judo Federation, over the age of 60, with at least a black belt 6th Dan. Out of 83 responses, 38 individuals, mean age 72.8 ± 7.9 years old, had at least one implant. The survey identified 36 total hip arthroplasties (THA) in 27 patients, 10 total knee arthroplasties (TKA) in 8 patients and 3 total shoulder arthroplasties (TSA) in 3 patients. The main evaluation criterion was the return to judo after joint replacement. Secondary criteria were the level of judo after surgery, rate of surgical revision at the final follow-up and the level of patient satisfaction. RESULTS: Twenty-nine out of 38 patients who underwent joint replacement returned to judo practice (76.3 %) a mean 4.1 ± 2.9 months after surgery. On the other hand, all patients stopped competitive judo. The surgeon recommended 65.8 % of these patients to stop practising judo. There were 2 surgical revisions in the THA group (5.5 %) for loosening at 6 and 9 years of follow-up. No dislocations or fractures were reported at the final follow-up. Thirty-two patients (84.2 %) were satisfied with their implant. CONCLUSION: The practice of judo does not seem to be limited by joint replacement. A clinical and radiological study should be performed to confirm these results.
