Constructing Highly Efficient Blue OLEDs with EQE up to 7.5% Based on Anthracene Derivatives

Chemistry. 2021 Sep 23. doi: 10.1002/chem.202103012. Online ahead of print.ABSTRACTAcquiring desirable device performance with deep-blue color purity that fulfills practical application requirements is still a challenge. Bipolar fluorescent emitters with HLCT state may serve to address this issue. Herein, by inserting anthracene core in the deep-blue building blocks, we successfully developed two highly twisted D-π-A fluorescent emitters, ICz-An-PPI and IP-An-PPI , featuring different acceptor groups. Both exhibited superb thermal stabilities, high PLQYs and excellent bipolar transport capabilities. The non-doped OLEDs using ICz-An-PPI and IP-An-PPI as the emitting layers showed efficient blue emission with an EQE max of 4.32% and 5.41%, and the CIE coordinates of (0.147, 0.180) and (0.149, 0.150), respectively. In addition, the deep blue doped device based on ICz-An-PPI was achieved with an excellent CE max of 5.83 cd A -1 , EQE max of 4.6% and the CIE coordinate of (0.148, 0.078), which is extremely close to the National Television Standards Committee (NTSC) standard. Particularly, IP-An-PPI -based doped device had better performance, with an EQE max of 7.51% and the CIE coordinate of (0.150, 0.118), which was very impressive among the recently reported deep-blue OLEDs with the CIE y < 0.12. Such high performance may be attributed to the hot exciton HLCT mechanism via T 7 to S 2 . Our work may provide a new approach for designing high-efficiency deep-blue materials.PMI...
Source: Chemistry - Category: Chemistry Authors: Source Type: research

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Angew Chem Int Ed Engl. 2021 Oct 19. doi: 10.1002/anie.202113086. Online ahead of print.ABSTRACTSolid-state zinc (Zn) batteries offer new desirable candidate for emerging applications sensitive to volume, safety and cost. However, current solid polymeric or ceramic electrolyte structures remain poorly conductive for the divalent Zn2+, especially at room temperature. Constructing a heterogeneous interface which allows Zn2+ percolation is a viable option, but this is rarely involved in multivalent systems. Herein, we split a new path to construct solid Zn2+-ion conductor via inducing crystallization of tailored eutectic liqu...
Source: Angewandte Chemie - Category: Chemistry Authors: Source Type: research
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Source: Frontiers in Genetics - Category: Genetics & Stem Cells Source Type: research
This systematic review and meta-analysis aims to compare the perinatal outcomes of complicated monochorionic (MC) pregnancies after selective reduction by radiofrequency ablation (RFA), bipolar cord coagulation (BCC) and interstitial laser (IL).
Source: American Journal of Obstetrics and Gynecology - Category: OBGYN Authors: Tags: Systematic Review Source Type: research
The purpose of the present study was to detect demographic and clinical factors associated with lifetime suicide attempts in Bipolar Disorder (BD). A total of 1673 bipolar patients from different psychiatric departments were compared according to the lifet...
Source: SafetyLit - Category: International Medicine & Public Health Tags: Suicide and Self-Harm Source Type: news
OBJECTIVES: Bipolar disorder is one of the most common and severe psychiatric conditions. It is frequently complicated by suicidal behaviors, and patients with BD are among those at higher risk of suicide. The aims of our study were to evaluate the predict...
Source: SafetyLit - Category: International Medicine & Public Health Tags: Suicide and Self-Harm Source Type: news
Biological, genetic and psychosocial factors may play a role in the aetiology of bipolar mood disorder (BPD). BPD episodes might be triggered by isotretinoin, a retinoid derivative of vitamin A with a role in cellular proliferation and differentiation. Due...
Source: SafetyLit - Category: International Medicine & Public Health Tags: Alcohol and Other Drugs Source Type: news
Conclusion: Only limited results were found regarding effects of a past suicide attempt on response times to emotional and suicide-related words, but there was an overall effect of major depression on slower response time. Protective genetic effects of the rs211034 A allele on this slowing were eliminated in those with a history of sexual abuse during childhood. Further research is needed to better characterize the mechanisms underlying the effects of childhood trauma on these genetic effects.
Source: Frontiers in Psychiatry - Category: Psychiatry Source Type: research
In this study, we therefore analysed the influence of lithium treatment on lifespan and parameters of health during ageing in mice. To determine the concentration of lithium suitable to be administered in a longitudinal ageing study, we first tested the effects of lithium chloride (LiCl) in doses from 0.01 to 2.79 g LiCl per kg chow. C57Bl/6J mice fed with 1.05-2.79 g/kg LiCL in the diet showed lithium plasma levels between 0.4 and 0.8 mM/l. While plasma levels to 0.4 and 0.8 mM/l are well tolerated by human patients, at doses above 1.44 g LiCl/kg, we observed an obvious dose-dependent polydipsia combined with a dis...
Source: Fight Aging! - Category: Research Authors: Tags: Newsletters Source Type: blogs
In this study, we investigated the difference in responses between the Wnt/β-catenin and ERK pathways by LiCl or epidermal growth factor (EGF) treatment of osteosarcoma cells. In particular, we analyzed the mechanisms responsible for differences in cell mobility and cell proliferation when pERK or β-catenin is activated. In osteosarcoma cells treated with LiCl or EGF, active β-catenin and p-ERK protein levels were significantly increased compared to those in the control group. However, in wound healing and transwell invasion assays, U2OS and SaOS2 cell migration was significantly reduced by LiCl treatment bu...
Source: Biochemical and Biophysical Research communications - Category: Biochemistry Authors: Source Type: research
Environ Res. 2021 Oct 14:112221. doi: 10.1016/j.envres.2021.112221. Online ahead of print.ABSTRACTBACKGROUND: The associations of atmospheric particulate matter with diameters of 2.5 μm or less (PM2.5) and road traffic noise with mental disorders in men and women are not well studied.OBJECTIVES: We aim to examine the cross-sectional associations of PM2.5 and road traffic noise with mental disorders in men and women.METHODS: The baseline data of the UK Biobank study (2006-2010) were used. Mental disorders including symptoms of nerves, anxiety, tension or depression (NATD), major depression, and bipolar disorder were asse...
Source: Environmental Research - Category: Environmental Health Authors: Source Type: research
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