Results 261 to 270 of about 19,448 (364)

Correlating the Photoshunt with Charge‐Collection Losses in Organic Solar Cells

open access: yesAdvanced Energy Materials, EarlyView.
Quantifying charge extraction losses in organic solar cells is crucial for understanding the origin of power losses and, consequently, for improving the performance. An analytical framework is presented that utilizes a readily available observable photoshunt and its correlation with light intensities for evaluating charge transport properties of a ...
Eunchi Kim   +2 more
wiley   +1 more source

A dictionary of locutions from liturgical books by protopriest A. I. Nevostruev (мѵро-мѵрсiнѡръ; набдѣваю-напрасный)

open access: diamond, 2019
Maria Davydenkova   +4 more
openalex   +1 more source

Impact of Transition Metals and Electrocatalyst Layer Thickness on the Pt‐Based Cathodes of Proton Exchange Membrane Fuel Cells – Do Multimetallic Electrocatalysts Necessarily Yield an Improved Performance?

open access: yesAdvanced Energy Materials, EarlyView.
Nonnoble transition‐metals (TMs) in PtCuNi/C catalysts have a dual influence in proton‐exchange membrane fuel cell cathode catalyst layer. While TMs act as a “sacrificial component” of PtCuNi/C, inhibiting Pt dissolution from the PtMx nanoparticles bearing the active sites, they promote the formation of separate catalysts and ionomer domains in the ...
Ricardo Sgarbi   +16 more
wiley   +1 more source

Transport Resistance Dominates the Fill Factor Losses in Record Organic Solar Cells

open access: yesAdvanced Energy Materials, EarlyView.
Organic photovoltaics are a promising solar cell technology, but even the record devices with 20% efficiency have significant fill factor losses due to low active layer conductivities. In this Perspective, the authors describe the origin of these losses, discuss experimental methods for their quantification, and explain how to minimize them to optimize
Chen Wang   +6 more
wiley   +1 more source

The Value of Device Characterization for the Optimization of Organic Solar Cells

open access: yesAdvanced Energy Materials, EarlyView.
Using the example of organic photovoltaics (OPV), this study examines whether and when additional measurements can be helpful in process optimization. A virtual laboratory based on real solar cells serves as a benchmark function to compare two different approaches for process optimization, namely black‐box optimization (black circle) and model‐based ...
Leonard Christen   +4 more
wiley   +1 more source

Toward Understanding the Stability of Single‐Atom Catalysts in Oxygen Evolution Reactions

open access: yesAdvanced Energy Materials, EarlyView.
Enhancing the stability of single‐atom catalysts for the oxygen evolution reaction hinges on understanding support interactions, local geometry, and structural dynamics. Transitioning to OH‐modified surfaces offers a promising route to cap surface metals and prevent leaching, paving the way for the next generation of stable OER SACs.
Maxwell Tsipoaka, Ali A. Rownaghi
wiley   +1 more source

La locution entre langue et usages

open access: bronze, 1997
Michel Martins-Baltar   +1 more
openalex   +1 more source

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