Results 261 to 270 of about 701,026 (330)

Effect of Inhomogeneous Temperature in Chip‐Scale Infrared Thermal Sources: A Revisited Blackbody Radiation Formula with Experimental Validation

open access: yesAdvanced Electronic Materials, EarlyView.
Revisited Black‐body radiation formula accounting for nonuniform temperature is proposed for calibration of planar thermal light sources. Calibration of optical power is based on measurement of the highest and lowest temperatures. Abstract Miniature and low‐cost light sources are highly desirable for numerous optical microsystems.
Shady R. Labib   +5 more
wiley   +1 more source

Efficient Gradient‐Enhanced SLSQP Optimization Design of Ultra‐Thin Broadband Honeycomb‐FSS Structure

open access: yesAdvanced Electronic Materials, EarlyView.
This study introduces a gradient‐driven optimization framework for multilayer honeycomb‐FSS composite absorber, integrating differentiable gradient functions with optimization process, providing new ideas for the optimal design of absorbing structures.
Huimin Xiang   +4 more
wiley   +1 more source

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

Impact of Trap Depth on the Steady‐State and Transient Photoluminescence in Halide Perovskite Films

open access: yesAdvanced Energy Materials, EarlyView.
The presence of shallow traps in halide perovskites is frequently postulated by density functional theory calculations. This review studies the implications of recombination‐active shallow traps on steady‐state and transient recombination kinetics. How to identify shallow traps and how the depth of the traps and their density are reflected in different
Jürgen Hüpkes   +2 more
wiley   +1 more source

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