Results 101 to 110 of about 62,606 (295)

Simulated [111] Si-SiGe terahertz quantum cascade laser [PDF]

, 2008
The prospect of developing a silicon laser has long been an elusive goal, mainly due to the indirect band gap and large effective carrier masses. We present a design for a terahertz intersubband laser grown on the [111] crystal plane and simulate ...
Ikonic, Z., Kelsall, R. W., Lever, L., Valavanis, A.   +3 more
core   +1 more source

Influence of Outcoupling Layers on Top‐Emitting Perovskite Light‐Emitting Diodes

Advanced Optical Materials, Volume 13, Issue 8, March 13, 2025.
Top‐emitting perovskite LEDs offer benefits over typical bottom‐emitting architectures, toward lasing, improved thermal management, and on‐chip fabrication compatibility. Outcoupling layers offer a strategy uniquely applicable to top‐emitting LEDs to optimize EQE by improving optical outcoupling.
James C. Loy, Weiming Qiu, Diane Yang, Jack Scherlag, Jonathan Scott, Barry P. Rand   +5 more
wiley   +1 more source

Voltage modulated electro-luminescence spectroscopy and negative capacitance - the role of sub-bandgap states in light emitting devices

, 2011
Voltage modulated electroluminescence spectra and low frequency ({\leq} 100 kHz) impedance characteristics of electroluminescent diodes are studied. Voltage modulated light emission tracks the onset of observed negative capacitance at a forward bias ...
Bhattacharya P., Kanika Bansal, Pankove J. I., Schroder D. K., Shouvik Datta, Sze S. M.   +5 more
core   +1 more source

Enhancing Organic Light‐Emitting Diode Performance Using Naturally Derived Diatomite: A Cost‐Effective and Eco‐Friendly Strategy

Advanced Optical Materials, EarlyView.
Diatomite‐based light extraction structures enable enhanced photon outcoupling through multi‐angle scattering and far‐field redistribution. By harnessing the unique scattering behavior of diatomite, this approach introduces randomly oriented scattering centers that effectively reshape internal light propagation.
Chang Min Lee, Ki Ha Min, Donghyun Choi, Yeong Beom Kim, Insung Ha, Mengdi Fu, Hyun Jae Lee, Ezhakudiyan Ravindran, Chul Hoon Kim, Jeongho Lee, Kyoung‐Ho Kim, Seung Pil Pack, Seung Yoon Ryu   +12 more
wiley   +1 more source

Quantitative Prediction of Power Loss for Damaged Photovoltaic Modules Using Electroluminescence

Energies, 2018
Electroluminescence (EL) is a powerful tool for the qualitative mapping of the electronic properties of solar modules, where electronic and electrical defects are easily detected. However, a direct quantitative prediction of electrical module performance
Timo Kropp, Markus Schubert, Jürgen H. Werner   +2 more
doaj   +1 more source

Modeling of space charge dynamics in polyethylene under AC stress based on bipolar charge transport model

Materials Research Express, 2020
Space charge dynamics under AC stress is of importance as a majority of high voltage cables are under AC stress, and space charge is the driving mechanism of dielectric degradation under these conditions.
Xinjing Cai, Xin Lin, Jianli Yu, Zhiwei Lu   +3 more
doaj   +1 more source

Homogeneously bright, flexible and foldable lighting devices with functionalised graphene electrodes [PDF]

, 2016
Alternating current electroluminescent technology allows the fabrication of large area, flat and flexible lights. Presently the maximum size of a continuous panel is limited by the high resistivity of available transparent electrode materials causing a ...
Alonso, Elias Torres, Craciun, Monica Felicia, Jones, Gareth Francis, Karkera, George, Russo, Saverio   +4 more
core   +4 more sources

Solution‐Processed Spin‐Polarized Light‐Emitting Diodes of Colloidal Quantum Wells and Magnetic Nanoparticles

Advanced Optical Materials, EarlyView.
All‐solution‐processed spin‐LEDs based on colloidal Fe3O4 nanoparticles and CdSe/CdZnS core/shell CQWs that allows for polarization modulation of electroluminescence are fabricated. With these devices, electrical injection of spin‐polarized carriers from the Fe3O4 nanoparticle layer into the CdSe/CdZnS CQWs is demonstrated, realizing circularly ...
Savas Delikanli, Arinjoy Bhattacharya, Betul Canimkurbey, Chang Huai, Amani Almutairi, Arman Najafi, Hilal Korkut, Farzan Shabani, Furkan Isik, James Pientka, Ibrahim Sarpkaya, Hao Zeng, Richard D. Schaller, Athos Petrou, Hilmi Volkan Demir   +14 more
wiley   +1 more source

Submicron Patterning Techniques for Perovskite Optoelectronics From Materials Challenges to Scalable Device Integration

Advanced Optical Materials, EarlyView.
This review highlights submicron patterning strategies for metal halide perovskites, focusing on solvent compatibility, resolution, and alignment toward scalable integration in advanced optoelectronic systems. Abstract Halide perovskites are promising materials for future optoelectronic and display systems.
Dante Ahn, Minz Lee, Youngsoo Jang, Gun Young Jung, Yusin Pak   +4 more
wiley   +1 more source

Charakterizace tenkovrstvých elektroluminiscenčních součástek [PDF]

, 2008
Jádrem této disertační práce bylo studovat optické a elektrické charakteristiky tenkovrstvých elektroluminiscenčních součástek řízených střídavým proudem (ACTFEL) a zejména vliv procesu stárnutí luminiforů na jejich optické a elektrické vlastnosti. Cílem
Ahmed, Mustafa M. Abdalla
core