Active layer solution-processed NIR-OLEDs based on ternary erbium(iii) complexes with 1,1,1-trifluoro-2,4-pentanedione and different N,N-donors

2014 ◽  
Vol 43 (48) ◽  
pp. 18087-18096 ◽  
Author(s):  
P. Martín-Ramos ◽  
C. Coya ◽  
V. Lavín ◽  
I. R. Martín ◽  
M. Ramos Silva ◽  
...  
Keyword(s):  
Active Layer ◽  
Ancillary Ligand ◽  
Solution Processed ◽  
The Impact ◽  
Layer Solution

The impact of the diimide ancillary ligand choice on the EL properties has been assessed for NIR-OLEDs based on three novel Er(iii) fluorinated β-diketonate complexes.

scholarly journals Active layer slope disturbances affect seasonality and composition of dissolved nitrogen export from High Arctic headwater catchments

2017 ◽  
Vol 3 (2) ◽  
pp. 429-450 ◽  
Author(s):  
Melissa J. Lafrenière ◽  
Nicole L. Louiseize ◽  
Scott F. Lamoureux
Keyword(s):  
Active Layer ◽  
High Arctic ◽  
Rainfall Runoff ◽  
Headwater Catchments ◽  
Dissolved Nitrogen ◽  
Total Dissolved Nitrogen ◽  
Nitrate Export ◽  
Limiting Nutrient ◽  
Seasonal Discharge ◽  
The Impact

This study investigates the impacts of active layer detachments (ALDs) on nitrogen in seasonal runoff from High Arctic hillslope catchments. We examined dissolved nitrogen in runoff from an undisturbed catchment (Goose (GS)) and one that was disturbed (Ptarmigan (PT)) by ALDs, prior to disturbance (2007) and 5 years after disturbance (2012). The seasonal dynamics of nitrogen species concentrations and fluxes were similar in both catchments in 2007, but the mean seasonal nitrate concentration and mass flux from the disturbed catchment were on the order of 30 times higher relative to the undisturbed catchment in 2012. Stormflow yielded 45% and 60% of the 2012 total dissolved nitrogen flux in GS and PT, respectively, although rainfall runoff provided less than 25% of seasonal discharge. Results support that through the combined effects of increased disturbance and rainfall, climate change stands to significantly enhance the export of nitrate from High Arctic watersheds. This study highlights that the increase in the delivery of nitrate from disturbance is especially pronounced late in the season when downstream productivity and the biological demand for this often limiting nutrient are high. Our results also demonstrate that the impact of ALDs on nitrate export can persist more than 5 years following disturbance.

scholarly journals Recent changes to the hydrological cycle of an Arctic basin at the tundra–taiga transition

2018 ◽  
Vol 22 (7) ◽  
pp. 3993-4014 ◽  
Author(s):  
Sebastian A. Krogh ◽  
John W. Pomeroy
Keyword(s):  
Layer Thickness ◽  
Active Layer ◽  
Snow Water Equivalent ◽  
Hydrological Cycle ◽  
Arctic Basin ◽  
Hydrological Processes ◽  
Active Layer Thickness ◽  
Blowing Snow ◽  
Hydrological Changes ◽  
The Impact

Abstract. The impact of transient changes in climate and vegetation on the hydrology of small Arctic headwater basins has not been investigated before, particularly in the tundra–taiga transition region. This study uses weather and land cover observations and a hydrological model suitable for cold regions to investigate historical changes in modelled hydrological processes driving the streamflow response of a small Arctic basin at the treeline. The physical processes found in this environment and explicit changes in vegetation extent and density were simulated and validated against observations of streamflow discharge, snow water equivalent and active layer thickness. Mean air temperature and all-wave irradiance have increased by 3.7 ∘C and 8.4 W m−2, respectively, while precipitation has decreased 48 mm (10 %) since 1960. Two modelling scenarios were created to separate the effects of changing climate and vegetation on hydrological processes. Results show that over 1960–2016 most hydrological changes were driven by climate changes, such as decreasing snowfall, evapotranspiration, deepening active layer thickness, earlier snow cover depletion and diminishing annual sublimation and soil moisture. However, changing vegetation has a significant impact on decreasing blowing snow redistribution and sublimation, counteracting the impact of decreasing precipitation on streamflow, demonstrating the importance of including transient changes in vegetation in long-term hydrological studies. Streamflow dropped by 38 mm as a response to the 48 mm decrease in precipitation, suggesting a small degree of hydrological resiliency. These results represent the first detailed estimate of hydrological changes occurring in small Arctic basins, and can be used as a reference to inform other studies of Arctic climate change impacts.

Highly-efficient solution-processed deep-red organic light-emitting diodes based on heteroleptic Ir(III) complexes with effective heterocyclic Schiff base as ancillary ligand

2020 ◽  
Vol 86 ◽  
pp. 105885
Author(s):  
Meha J. Prajapati ◽  
Rohit Ashok Kumar Yadav ◽  
Sujith Sudheendran Swayamprabha ◽  
Deepak Kumar Dubey ◽  
Jaydip D. Solanki ◽  
...  
Keyword(s):  
Schiff Base ◽  
Efficient Solution ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Ancillary Ligand ◽  
Solution Processed ◽  
Light Emitting ◽  
Highly Efficient ◽  
Organic Light

Efficient single layer solution-processed blue-emitting electrophosphorescent devices based on a small-molecule host

2008 ◽  
Vol 92 (26) ◽  
pp. 263301 ◽  
Author(s):  
Liudong Hou ◽  
Lian Duan ◽  
Juan Qiao ◽  
Wei Li ◽  
Deqiang Zhang ◽  
...  
Keyword(s):  
Small Molecule ◽  
Single Layer ◽  
Solution Processed ◽  
Layer Solution

The impact of active layer design on quantum efficiency of InGaN light emitting diodes

2012 ◽  
Author(s):  
F. Zhang ◽  
X. Li ◽  
S. Okur ◽  
V. Avrutin ◽  
Ü. Özgür ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
Active Layer ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
The Impact

scholarly journals The impact of active layer nanomorphology on the efficiency of organic solar cells based on a squaraine dye electron donor

2016 ◽  
Vol 700 ◽  
pp. 012052
Author(s):  
D Stoyanova ◽  
S Kitova ◽  
J Dikova ◽  
M Kandinska ◽  
A Vasilev ◽  
...  
Keyword(s):  
Solar Cells ◽  
Active Layer ◽  
Electron Donor ◽  
Organic Solar Cells ◽  
Squaraine Dye ◽  
The Impact
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