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Slot die coated planar perovskite solar cells via blowing and heating assisted one step deposition
Kim, Jueng-Eun,Jung, Yen-Sook,Heo, Youn-Jung,Hwang, Kyeongil,Qin, Tianshi,Kim, Dong-Yu,Vak, Doojin North-Holland 2018 Solar Energy Materials and Solar Cells Vol. No.
<P><B>Abstract</B></P> <P>CH<SUB>3</SUB>NH<SUB>3</SUB>PbI<SUB>3</SUB>-based planar perovskite solar cells were fabricated by slot-die coating, a scalable method. Slot-die coating tends to produce perovskite layers with much lower coverage with overgrown crystals than spin coating, which does not include a self-drying mechanism in the process. To mimic the self-drying behavior inherent in spin coating, the present study introduces a blowing step in the slot-die coating method, which significantly improved coverage of the prepared slot-die coated perovskite films. The slot-die-coated device with blowing showed a moderate power conversion efficiency (PCE) of 8.8%. The morphology of the slot-die-coated perovskite film is further improved by optimizing the deposition temperature. The combination of blowing and heating during the slot-die-coating step and the introduction of a printing-friendly hole transport layer resulted in a PCE of 12.7% for the devices fabricated in air.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Scalable and roll-to-roll compatible deposition process is developed to produce planar perovskite solarcells. </LI> <LI> The highest efficiency from single-step slot die coated perovskite solar cells is achieved. </LI> <LI> Synergy effect of gas blowing and heating on morphology of slot die coated films is found. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Kim, Doojin,Mun, Sora,Lee, Jiyeong,Park, Arum,Seok, AeEun,Chun, Yeon-Tae,Kang, Hee-Gyoo Elsevier 2018 INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES Vol.109 No.-
<P><B>Abstract</B></P> <P>Rheumatoid factor (RF) is an auto-antibody against antigen–antibody immune complexes. RF is valuable as a biomarker for the screening of autoimmune and infectious diseases. However, it is suggested that RF would be a more powerful biomarker when used complementarily with RF-correlated proteins. In this study, we utilized a proteomic approach to analyze global protein expression in RF-low and RF-high subjects using high-performance liquid chromatography tandem mass spectrometry. Histidine-rich glycoprotein (HRG) and lipopolysaccharide-binding protein (LBP) were found to be differentially expressed between RF-low and RF-high subjects (cut-off > 2-fold, <I>p <</I> 0.05), which was validated by enzyme-linked immunosorbent assay. To evaluate whether both proteins allow discriminating rheumatoid arthritis patients from healthy controls, receiver-operating characteristic (ROC) curves were analyzed. Areas under the ROC curves of HRG and LBP were 0.861 and 0.888, respectively. The correlation between RF and HRG was statistically significant (<I>p</I> = 0.003), and LBP was also correlated with RF (<I>p</I> = 0.044), as indicated by correlation analysis. HRG and LBP are reportedly involved in RF-producing and RF-correlated diseases. Thus, we propose that HRG and LBP could be useful screening markers for RF-correlated diseases.</P>