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https://www.readbyqxmd.com/read/28345338/study-of-arylamine-substituted-porphyrins-as-hole-transporting-materials-in-high-performance-perovskite-solar-cells
#1
Song Chen, Peng Liu, Yong Hua, Yuanyuan Li, Lars Kloo, Xingzhu Wang, Beng S Ong, Wai-Kwok Wong, Xunjin Zhu
To develop new hole transporting materials (HTMs) for efficient and stable perovskite solar cells (PSCs), 5,10,15,20-tetrakis{4-[N,N-di(4-methoxylphenyl)amino-phenyl]}- porphyrin has been prepared in gram scale through the direct condensation of pyrrole and 4-[bis(4-methoxyphenyl)amino]benzaldehyde. Its Zn(II) and Cu(II) complexes exhibit excellent thermal and electrochemical stability, specifically, high hole mobility and very favorable energetics for hole extraction that render them a new class of HTMs in organometallic halide perovskite solar cells (PSCs)...
March 27, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28337770/hypoglycemic-effect-of-hawthorn-in-type-ii-diabetes-mellitus-rat-model
#2
Aili Aierken, Tina Buchholz, Chen Chen, Xiaoying Zhang, Matthias F Melzig
BACKGROUND: Hawthorn is one of the popular herbs in many different traditional medicine systems including in Traditional Chinese Medicine (TCM), where it has long been used for the treatment of hyperglycemia. However, most of its varied biological activities are still remaining unexplored. This study investigated the hypoglycemic effect of hawthorn extracts in type II diabetic (T2DM) rat model. A total of 54 rats were randomly divided into six groups. Normal control group (NC), type II diabetic model group (T2DM, T2DM rats were induced by high fat diet and streptozotocin), high, middle and low concentrations of hawthorn treat groups (HTH , HTM and HTL , T2DM rats were given hawthorn extract at the dose of 50, 100 and 200 mg kg ^-1...
March 23, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28335435/spirobifluorene-core-based-novel-hole-transporting-materials-for-red-phosphorescence-oleds
#3
Ramanaskanda Braveenth, Hyeong Woo Bae, Quynh Pham Bao Nguyen, Haye Min Ko, Choong Hun Lee, Hyeong Jun Kim, Jang Hyuk Kwon, Kyu Yun Chai
Two new hole transporting materials, named HTM 1A and HTM 1B, were designed and synthesized in significant yields using the well-known Buchwald Hartwig and Suzuki cross- coupling reactions. Both materials showed higher decomposition temperatures (over 450 °C) at 5% weight reduction and HTM 1B exhibited a higher glass transition temperature of 180 °C. Red phosphorescence-based OLED devices were fabricated to analyze the device performances compared to Spiro-NPB and NPB as reference hole transporting materials...
March 14, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28334340/meta-analytic-framework-for-liquid-association
#4
Lin Wang, Silvia Liu, Ying Ding, Shin-Sheng Yuan, Yen-Yi Ho, George C Tseng
Motivation: Although coexpression analysis via pair-wise expression correlation is popularly used to elucidate gene-gene interactions at the whole-genome scale, many complicated multi-gene regulations require more advanced detection methods. Liquid association is a powerful tool to detect the dynamic correlation of two gene variables depending on the expression level of a third variable (LA scouting gene). Liquid association detection from single transcriptomic study, however, is often unstable and not generalizable due to cohort bias, biological variation, and limited sample size...
March 11, 2017: Bioinformatics
https://www.readbyqxmd.com/read/28332402/small-molecule-polymer-composite-hole-transporting-layer-for-highly-efficient-and-stable-perovskite-solar-cells
#5
Jinmiao Wang, Zhao-Kui Wang, Meng Li, Ke-Hao Hu, Yingguo Yang, Yun Hu, Xingyu Gao, Liang-Sheng Liao
Effective and stable hole-transporting materials (HTMs) are necessary for obtaining excellent planar perovskite solar cells (PSCs). Herein, we reported a solution-processed composite HTM consisting of a polymer ploy(3,4-ethylene-dioxythiophene):ploystyrenesulfonate (PEDOT:PSS) and a small molecule copper phthalocyanine-3,4',4'',4'''-tetra-sulfonated acid tetra sodium salt (TS-CuPc) with optimized doping ratios. The composite HTM is crucial on account of not only enhancing the hole transport and extraction, but also improving the perovskite crystallization...
March 23, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28314164/calculation-spreadsheet-for-uncertainty-estimation-of-measurement-results-in-gamma-ray-spectrometry-and-its-validation-for-quality-assurance-purpose
#6
Alessia Ceccatelli, Ashild Dybdal, Ales Fajgelj, Aurelien Pitois
An Excel calculation spreadsheet has been developed to estimate the uncertainty of measurement results in γ-ray spectrometry. It considers all relevant uncertainty components and calculates the combined standard uncertainty of the measurement result. The calculation spreadsheet has been validated using two independent open access software and is available for download free of charge at: https://nucleus.iaea.org/rpst/ReferenceProducts/Analytical_Methods/index.htm. It provides a simple and easy-to-use template for estimating the uncertainty of γ-ray spectrometry measurement results and supports the radioanalytical laboratories seeking accreditation for their measurements using γ-ray spectrometry...
March 3, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28296440/cutting-edge-technologies-that-could-reshape-htm-and-health-it
#7
Jeff Kabachinski
No abstract text is available yet for this article.
March 2017: Biomedical Instrumentation & Technology
https://www.readbyqxmd.com/read/28296439/htm-pay-close-attention-to-compliance-revisions-and-maintenance-standards
#8
Stephen Grimes
No abstract text is available yet for this article.
March 2017: Biomedical Instrumentation & Technology
https://www.readbyqxmd.com/read/28287749/boron-doping-of-multi-walled-carbon-nanotubes-significantly-enhances-hole-extraction-in-carbon-based-perovskite-solar-cells
#9
Xiaoli Zheng, Haining Chen, Qiang Li, Yinglong Yang, Zhanhua Wei, Yang Bai, Yongcai Qiu, Dan Zhou, Kam Sing Wong, Shihe Yang
Compared with the conventional perovskite solar cells (PSCs) containing hole-transport materials (HTM), carbon materials based HTM-free PSCs (C-PSCs) have often suffered from inferior power conversion efficiencies (PCEs) arising at least partially from the inefficient hole extraction at perovskite/carbon interface. Here, we show that boron (B) doping of multi-walled carbon nanotubes (B-MWNTs) electrodes are superior in enabling enhanced hole extraction and transport by increasing work function, carrier concentration and conductivity of MWNTs...
March 13, 2017: Nano Letters
https://www.readbyqxmd.com/read/28277472/transvaginal-repair-of-complex-rectovaginal-fistulas-using-the-porcine-urinary-bladder-matrix-as-an-augmenting-graft
#10
Hemikaa Devakumar, Neeraja Chandrasekaran, Alexandriah Alas, Laura Martin, G Willy Davila, Eric Hurtado
BACKGROUND: After the US Food and Drug Administration issued a safety warning concerning vaginal mesh implants in 2008, their use in correction of pelvic floor defects have decreased in the United States (http://www.fda.gov/NewsEvents/Newsroom/PressAnnouncements/ucm479732.htm). However, we are still treating patients who have had complications associated with their use, rectovaginal fistulas (RVFs) being one of them. Rectovaginal fistulas are considered complex if greater than 2.5 cm, recurrent, associated with inflammatory bowel disease, or if they are proximal in location...
March 9, 2017: Female Pelvic Medicine & Reconstructive Surgery
https://www.readbyqxmd.com/read/28273950/methoxydiphenylamine-substituted-fluorene-derivatives-as-hole-transporting-materials-role-of-molecular-interaction-on-device-photovoltaic-performance
#11
Robertas Tiazkis, Sanghyun Paek, Maryte Daskeviciene, Tadas Malinauskas, Michael Saliba, Jonas Nekrasovas, Vygintas Jankauskas, Shahzada Ahmad, Vytautas Getautis, Mohammad Khaja Nazeeruddin
The molecular structure of the hole transporting material (HTM) play an important role in hole extraction in a perovskite solar cells. It has a significant influence on the molecular planarity, energy level, and charge transport properties. Understanding the relationship between the chemical structure of the HTM's and perovskite solar cells (PSCs) performance is crucial for the continued development of the efficient organic charge transporting materials. Using molecular engineering approach we have constructed a series of the hole transporting materials with strategically placed aliphatic substituents to investigate the relationship between the chemical structure of the HTMs and the photovoltaic performance...
December 2017: Scientific Reports
https://www.readbyqxmd.com/read/28253424/botulinum-toxin-for-the-treatment-of-strabismus
#12
REVIEW
Fiona J Rowe, Carmel P Noonan
BACKGROUND: The use of botulinum toxin as an investigative and treatment modality for strabismus is well reported in the medical literature. However, it is unclear how effective it is in comparison to other treatment options for strabismus. OBJECTIVES: The primary objective was to examine the efficacy of botulinum toxin therapy in the treatment of strabismus compared with alternative conservative or surgical treatment options. This review sought to ascertain those types of strabismus that particularly benefit from the use of botulinum toxin as a treatment option (such as small angle strabismus or strabismus with binocular potential, i...
March 2, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28249374/solution-processed-cu-in-ga-s-se-2-nanocrystal-as-inorganic-hole-transporting-material-for-efficient-and-stable-perovskite-solar-cells
#13
Lu Xu, Lin-Long Deng, Jing Cao, Xin Wang, Wei-Yi Chen, Zhiyuan Jiang
Perovskite solar cells are emerging as one of the most promising candidates for solar energy harvesting. To date, most of the high-performance perovskite solar cells have exclusively employed organic hole-transporting materials (HTMs) such as 2,2',7,7'-tetrakis-(N,N-di-p-methoxyphenylamine)-9,9'-spirobifluorene (spiro-OMeTAD) or polytriarylamine (PTAA) which are often expensive and have low hole mobility. Almost all these HTMs reported needed lithium salt, e.g., lithium bis(trifluoromethylsulfonyl)imide (Li-TFSI) doping, to improve hole mobility and performance...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28224320/forward-masking-in-cochlear-implant-users-electrophysiological-and-psychophysical-data-using-pulse-train-maskers
#14
Youssef Adel, Gaston Hilkhuysen, Arnaud Noreña, Yves Cazals, Stéphane Roman, Olivier Macherey
Electrical stimulation of auditory nerve fibers using cochlear implants (CI) shows psychophysical forward masking (pFM) up to several hundreds of milliseconds. By contrast, recovery of electrically evoked compound action potentials (eCAPs) from forward masking (eFM) was shown to be more rapid, with time constants no greater than a few milliseconds. These discrepancies suggested two main contributors to pFM: a rapid-recovery process due to refractory properties of the auditory nerve and a slow-recovery process arising from more central structures...
February 21, 2017: Journal of the Association for Research in Otolaryngology: JARO
https://www.readbyqxmd.com/read/28217314/potential-role-for-clinical-calibration-to-increase-engagement-with-and-application-of-home-telemonitoring-a-report-from-the-heartcycle-programme
#15
Paloma Gastelurrutia, Josep Lupón, Mar Domingo, Wim Stut, Silviu Dovancescu, John Cleland, Lutz Frankenstein, Antoni Bayes-Genis
AIMS: There is a need for alternative strategies that might avoid recurrent admissions in patients with heart failure. home telemonitoring (HTM) to monitor patient's symptoms from a distance may be useful. This study attempts to assess changes in HTM vital signs in response to daily life activities (variations in medication, salt intake, exercise, and stress) and to establish which variations affect weight, blood pressure, and heart rate. METHODS AND RESULTS: We assessed 76 patients with heart failure (mean age 76 ± 10...
February 2017: ESC Heart Failure
https://www.readbyqxmd.com/read/28211919/high-performance-regular-perovskite-solar-cells-employing-low-cost-poly-ethylenedioxythiophene-as-a-hole-transporting-material
#16
Xiaoqing Jiang, Ze Yu, Yuchen Zhang, Jianbo Lai, Jiajia Li, Gagik G Gurzadyan, Xichuan Yang, Licheng Sun
Herein, we successfully applied a facile in-situ solid-state synthesis of conducting polymer poly(3,4-ethylenedioxythiophene) (PEDOT) as a HTM, directly on top of the perovskite layer, in conventional mesoscopic perovskite solar cells (PSCs) (n-i-p structure). The fabrication of the PEDOT film only involved a very simple in-situ solid-state polymerisation step from a monomer 2,5-dibromo-3,4-ethylenedioxythiophene (DBEDOT) made from a commercially available and cheap starting material. The ultraviolet photoelectron spectroscopy (UPS) demonstrated that the as-prepared PEDOT film possesses the highest occupied molecular orbital (HOMO) energy level of -5...
February 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28211274/large-grain-based-hole-blocking-layer-free-planar-type-perovskite-solar-cell-with-best-efficiency-of-18-20
#17
Haejun Yu, Jaehoon Ryu, Jong Woo Lee, Jongmin Roh, Kisu Lee, Juyoung Yun, Jungsup Lee, Yun Ki Kim, Doyk Hwang, Jooyoun Kang, Seong Keun Kim, Jyongsik Jang
There remains tremendous interest in perovskite solar cells (PSCs) in the solar energy field; the certified power conversion efficiency (PCE) now exceeds 20%. Along with research focused on enhancing PCE, studies are also underway concerning PSC commercialization. It is crucial to simplify the fabrication process and reduce the production cost to facilitate commercialization. Herein, we successfully fabricated highly efficient hole-blocking layer (HBL)-free PSCs through vigorously interrupting penetration of hole-transport material (HTM) into fluorine-doped tin oxide by a large grain based-CH3NH3PbI3 (MAPbI3) film, thereby obtaining a PCE of 18...
February 23, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28198594/interfacial-engineering-of-perovskite-solar-cells-by-employing-a-hydrophobic-copper-phthalocyanine-derivative-as-hole-transporting-material-with-improved-performance-and-stability
#18
Ze Yu, Xiaoqing Jiang, Jianbo Lai, Yuchen Zhang, Maowei Hu, Ning Lei, Dongping Wang, Xichuan Yang, Licheng Sun
In high-performance perovskite solar cells (PSCs), hole-transporting materials (HTMs) play important roles in extracting and transporting the photo-generated holes from the perovskite absrorber to the cathode, thus reducing unwanted recombination losses and enhancing the photovoltaic performance. Herein, solution-processable tetra-4-(bis(4-tert-butyl)phenyl)amino)phenoxy-substituted copper phthalocyanine (CuPc-OTPAtBu) has been synthesized and explored as a HTM in PSCs. The optical, electrochemical and thermal properties are fully characterized for this organic metal complex...
February 15, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28182719/context-adaptive-based-cu-processing-for-3d-hevc
#19
Liquan Shen, Ping An, Zhi Liu
The 3D High Efficiency Video Coding (3D-HEVC) standard aims to code 3D videos that usually contain multi-view texture videos and its corresponding depth information. It inherits the same quadtree prediction structure of HEVC to code both texture videos and depth maps. Each coding unit (CU) allows recursively splitting into four equal sub-CUs. At each CU depth level, it enables 10 types of inter modes and 35 types of intra modes in inter frames. Furthermore, the inter-view prediction tools are applied to each view in the test model of 3D-HEVC (HTM), which uses variable size disparity-compensated prediction to exploit inter-view correlation within neighbor views...
2017: PloS One
https://www.readbyqxmd.com/read/28181319/high-efficiency-perovskite-solar-cells-based-on-new-tpe-compounds-as-hole-transport-materials-role-of-2-7-and-3-6-substituted-carbazole-derivatives
#20
Linna Zhu, Yahan Shan, Rui Wang, Debei Liu, Cheng Zhong, Qunliang Song, Fei Wu
In this work, four tetraphenylethylene (TPE) centered hole transport materials (HTMs), with 2,7- or 3,6-substituted carbazole derivatives as periphery groups are deliberately synthesized and characterized. Their photophysical properties, energy levels and photovoltaic performances are systematically investigated, and their performances as HTMs are discussed with respect to the different substituent positions on carbazole moiety. It is interesting to find that the TPE-based HTMs with 2,7-carbazole substituents rival the 3,6-carbazole substituents in hole mobility and hole extraction ability...
February 8, 2017: Chemistry: a European Journal
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