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- 2019
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Tidskriftsartikel (refereegranskat)
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- Wolkeba, Zewdneh Genene, 1983, et al.
(författare)
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Polymer Acceptors with Flexible Spacers Afford Efficient and Mechanically Robust All-Polymer Solar Cells
- 2022
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Ingår i: Advanced Materials. - : Wiley. - 0935-9648 .- 1521-4095. ; 34:6
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Tidskriftsartikel (refereegranskat)abstract
- High efficiency and mechanical robustness are both crucial for the practical applications of all-polymer solar cells (all-PSCs) in stretchable and wearable electronics. In this regard, a series of new polymer acceptors (PAs) is reported by incorporating a flexible conjugation-break spacer (FCBS) to achieve highly efficient and mechanically robust all-PSCs. Incorporation of FCBS affords the effective modulation of the crystallinity and pre-aggregation of the PAs, and achieves the optimal blend morphology with polymer donor (PD), increasing both the photovoltaic and mechanical properties of all-PSCs. In particular, an all-PSC based on PYTS-0.3 PA incorporated with 30% FCBS and PBDB-T PD demonstrates a high power conversion efficiency (PCE) of 14.68% and excellent mechanical stretchability with a crack onset strain (COS) of 21.64% and toughness of 3.86 MJ m-3, which is significantly superior to those of devices with the PA without the FCBS (PYTS-0.0, PCE = 13.01%, and toughness = 2.70 MJ m-3). To date, this COS is the highest value reported for PSCs with PCEs of over 8% without any insulating additives. These results reveal that the introduction of FCBS into the conjugated backbone is a highly feasible strategy to simultaneously improve the PCE and stretchability of PSCs.
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- Zhou, Mengtao, et al.
(författare)
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The efficiency of continuous regional intra-arterial infusion in the treatment of infected pancreatic necrosis
- 2013
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Ingår i: Pancreatology. - : Elsevier BV. - 1424-3903. ; 13:3, s. 212-215
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Tidskriftsartikel (refereegranskat)abstract
- Objective: Our aim was to investigate the efficiency of continuous regional intra-arterial infusion (CRAI) with antisecretory agents and antibiotics in the treatment of infected pancreatic necrosis. Materials and methods: CRAI was used as a new clinical technique to treat acute pancreatitis patients during a 4-year period at the First Affiliated Hospital, Wenzhou Medical College, China. In this retrospective study, thirty-four patients with proven infected pancreatic necrosis were included. Twelve patients were treated with CRAL and were matched according to age, sex, APACHE II scores, Ranson scores and remote organ dysfunction, with 22 patients with IPN treated surgically. The clinical outcome following surgery and CRAI were compared. Results: No difference was found between the two groups when comparing age, gender, APACHE II scores, Ranson scores and remote organ dysfunction (p > 0.05). The patients treated with CRAI had a lower incidence of complications (33.3% vs 72.7%), duration of hospitalization (27.1 +/- 4.7 days vs 43.0 +/- 12.0 days) and cost of hospitalization (4.09 +/- 1.64 thousand RMB vs 8.77 +/- 3.74 thousand RMB) as compared to patients treated with surgery (p < 0.05). The survival rate was significantly higher in the CRAI group as compared to the surgical group (91.7% vs 63.6%; p < 0.01). However, the two groups had similar rates of concomitant operative treatment and incidence of remote organ dysfunction (p > 0.05). Conclusions: CRAI or CRAI in combination with abscess drainage seemingly improve the clinical outcome in patients with infected pancreatic necrosis. Further confirmative prospective randomized multicenter studies are warranted prior to broad introduction of the CRAI concept. Copyright (C) 2013, IAP and EPC. Published by Elsevier India, a division of Reed Elsevier India Pvt. Ltd. All rights reserved.
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