Explanipedia

Analysis of Collapse–Snapback Phenomena in Capacitive Micromachined Ultrasound Transducers Open

Chloé Halbach, Véronique Rochus, Jan Genoe, Xavier Rottenberg, David Cheyns , et al. · 2025

The pull-in and pull-out voltages are important characteristics of Capacitive Micromachined Ultrasound Transducers (CMUTs), marking the transition between conventional and collapse operation regimes. These voltages are commonly determined …

Sensor-Enabled Safety Systems for Human–Robot Collaboration: A Review Open

Constantin Scholz, Hoang-Long Cao, Emil Imrith, Nima Roshandel, Hamed Firouzipouyaei , et al. · 2024

Sensors are integrated into collaborative robot systems to ensure the safety of human workers by allowing them to perceive their environments, detect human presence, and adjust their actions accordingly. This PRISMA scoping review focuses…

A silicon photonics waveguide-coupled colloidal quantum dot photodiode sensitive beyond 1.6 µm Open

Chao Pang, Yu‐Hao Deng, Ezat Kheradmand, Luis Moreno Hagelsieb, Yüjie Guo , et al. · 2024

Silicon photonics faces a persistent challenge in extending photodetection capabilities beyond the 1.6 µm wavelength range, primarily due to the lack of appropriate epitaxial materials. Colloidal quantum dots present a promising solution h…

A silicon photonics waveguide-coupled colloidal quantum dot photodiode sensitive beyond 1.6 um Open

Chao Pang, Yu‐Hao Deng, Ezat Kheradmand, Luis Moreno Hagelsieb, Yüjie Guo , et al. · 2024

Silicon photonics faces a persistent challenge in extending photodetection capabilities beyond the 1.6 um wavelength range, primarily due to the lack of appropriate epitaxial materials. Colloidal quantum dots (QDs) present a promising solu…

Monolithic Near Infrared Image Sensors Enabled by Quantum Dot Photodetector Open

Paweł E. Malinowski, Epimitheas Georgitzikis, Jorick Maes, Mehedi Mamun, Oscar Enzing , et al. · 2024

Widespread deployment of infrared image sensors is prevented by high cost and low resolution. Nevertheless, narrow bandgap thin-films can enable wafer-level monolithic integration. This work describes a CMOS-compatible pixel stack based on…

Fully Organic Integrated Arrays on Flexible Substrates for X-Ray Imaging Open

Paweł E. Malinowski, Abhishek Kumar, Date Moet, David Cheyns, Barry P. Rand , et al. · 2024

Organic photodetectors (OPDs) show high detectivity even with ultrathin (submicron) active layers and enable fabrication on large area, flexible substrates. In this work, 32x32 pixel arrays are demonstrated, where the active layer based on…

A Thin-Film Pinned-Photodiode Imager Pixel with Fully Monolithic Fabrication and beyond 1Me- Full Well Capacity Open

Joo Hyoung Kim, François Berghmans, Abu Bakar Siddik, Irem Sutcu, Maria Isabel Pintor‐Monroy , et al. · 2023

Thin-film photodiodes (TFPD) monolithically integrated on the Si Read-Out Integrated Circuitry (ROIC) are promising imaging platforms when beyond-silicon optoelectronic properties are required. Although TFPD device performance has improved…

B 5.3 - Augmented Vision Enabled by Imagers Based on PbS Quantum Dots Open

Paweł E. Malinowski, V.Ž. Pejović, Jonas Bentell, Natarajan Chandrasekaran, Nikolaos G. Papadopoulos , et al. · 2023

Colloidal III–V Quantum Dot Photodiodes for Short‐Wave Infrared Photodetection Open

Jari Leemans, Vladimir Pejović, Epimitheas Georgitzikis, Matthias Minjauw, Abu Bakar Siddik , et al. · 2022

Short‐wave infrared (SWIR) image sensors based on colloidal quantum dots (QDs) are characterized by low cost, small pixel pitch, and spectral tunability. Adoption of QD‐SWIR imagers is, however, hampered by a reliance on restricted element…

Metalized Soft Polymers for Electromechanical Transducers on Glass Substrates Open

Boshen Liang, Grim Keulemans, Dominika Wys o cka, Lei Zhang, Véronique Rochus , et al. · 2021

In this study, two different semiconductor-grade polymers are utilized to build up membrane-based electromechanical transducers. With three to four orders of magnitude lower modulus in comparison with silicon, the use of polymers as the vi…

Optimization of Charge Carrier Extraction in Colloidal Quantum Dots Short‐Wave Infrared Photodiodes through Optical Engineering Open

Epimitheas Georgitzikis, Paweł E. Malinowski, Jorick Maes, Afshin Hadipour, Zeger Hens , et al. · 2018

Colloidal quantum dots (QDs) have attracted scientific interest for infrared (IR) optoelectronic devices due to their bandgap tunability and the ease of fabrication on arbitrary substrates. In this work, short‐wave IR photodetectors based …

Design, Modelling, And Characterization Of Display Compatible Pmut Device Open

Chih‐Hsien Huang, Hang Gao, Guilherme Brondani Torri, Shengping Mao, Yongbin Jeong , et al. · 2018

In this paper, the design, modeling, and characterization of a display compatible pMUT platform are presented. A FEM model is built using COMSOL Multiphysics for evaluating the frequency response, mechanical performance, acoustic pressure,…

Near-infrared organic photodetectors based on bay-annulated indigo showing broadband absorption and high detectivities up to 1.1 μm Open

Frederik Verstraeten, Sam Gielen, Pieter Verstappen, Jurgen Kesters, Epimitheas Georgitzikis , et al. · 2018

Organic photodetectors made from a BAI-based near-infrared copolymer reach high detectivities of 10¹² Jones and low dark currents of 10⁻⁷ A cm⁻².

Thin-Film Quantum Dot Photodiode for Monolithic Infrared Image Sensors Open

Paweł E. Malinowski, Epimitheas Georgitzikis, Jorick Maes, Ioanna Vamvaka, Fortunato Frazzica , et al. · 2017

Imaging in the infrared wavelength range has been fundamental in scientific, military and surveillance applications. Currently, it is a crucial enabler of new industries such as autonomous mobility (for obstacle detection), augmented reali…

Displacement of polarons by vibrational modes in doped conjugated polymers Open

Marie Anderson, Charusheela Ramanan, Claudio Fontanesi, Achidi Frick, S. S. L. Surana , et al. · 2017

Organic pi-conjugated polymers are deemed to be soft materials with strong electron-phonon coupling, which results in the formation of polarons, i.e., charge carriers dressed by self-localized distortion of the nuclei. Universal s…

Front Matter: Volume 9895 Open

David Cheyns, Pierre M. Beaujuge, Volker van Elsbergen, Jean-Charles Ribierre · 2016

Photovoltaics: Nonhazardous Solvent Systems for Processing Perovskite Photovoltaics (Adv. Energy Mater. 14/2016) Open

Kira Gardner, Jeffrey G. Tait, Tamara Merckx, Weiming Qiu, Ulrich W. Paetzold , et al. · 2016

In article number 1600386, Jeffrey G. Tait and co-workers develop non-hazardous ink systems, based on solvent-alcohol-acid, for coating perovskite photovoltaic films in a single step. Coating was further developed from spin to blade, while…

Nonhazardous Solvent Systems for Processing Perovskite Photovoltaics Open

Kira Gardner, Jeffrey G. Tait, Tamara Merckx, Weiming Qiu, Ulrich W. Paetzold , et al. · 2016

Replacing toxic solvents with nonhazardous solvents is one of the key challenges for industrial scale commercialization of thin film perovskite photovoltaics. Here, nonhazardous solvent/alcohol/acid systems are presented for the single‐ste…

Oxygen-Induced Degradation in C60-Based Organic Solar Cells: Relation Between Film Properties and Device Performance Open

João P. A. Bastos, Eszter Vörösházi, Eduard Fron, Guy Brammertz, Tim Vangerven , et al. · 2016

Fullerene-based molecules are the archetypical electron-accepting materials for organic photovoltaic devices. A detailed knowledge of the degradation mechanisms that occur in C60 layers will aid in the development of more stable organic so…

Real-Time Tracking of Singlet Exciton Diffusion in Organic Semiconductors Open

Oleg V. Kozlov, Foppe de Haan, Ross A. Kerner, Barry P. Rand, David Cheyns , et al. · 2016

Exciton diffusion in organic materials provides the operational basis for functioning of such devices as organic solar cells and light-emitting diodes. Here we track the exciton diffusion process in organic semiconductors in real time with…

Charge separation dynamics at bulk heterojunctions between poly(3-hexylthiophene) and PbS quantum dots Open

Yuliar Firdaus, Rany Miranti, Eduard Fron, Adis Khetubol, Erwin Vandenplas , et al. · 2015

Photo-induced electron transfer between poly-(3-hexylthiophene) (P3HT) and small (2.4 nm) PbS quantum dots (QDs), capped by different ligands, was studied by picosecond and femtosecond time-resolved fluorescence and by photo-induced absorp…

Energy Level Tuning of Non-Fullerene Acceptors in Organic Solar Cells Open

Kjell Cnops, Germán Zango, Jan Genoe, Paul Heremans, M. Victoria Martínez‐Díaz , et al. · 2015

The use of non-fullerene acceptors in organic photovoltaic (OPV) devices could lead to enhanced efficiencies due to increased open-circuit voltage (VOC) and improved absorption of solar light. Here we systematically investigate planar hete…

Blade Coating: Determination of Solvent Systems for Blade Coating Thin Film Photovoltaics (Adv. Funct. Mater. 22/2015) Open

Jeffrey G. Tait, Tamara Merckx, Wenqi Li, Cindy Wong, Robert Gehlhaar , et al. · 2015

A five-step procedure to develop solvent systems for thin film photovoltaic materials is described on page 3393 by P. Heremans and co-workers. A combination of wettability studies, toxicological insights, and Hansen solubility parameters a…

Amorphous indium-gallium-zinc-oxide as electron transport layer in organic photodetectors Open

Himani Arora, Paweł E. Malinowski, Adrian Chasin, David Cheyns, Soeren Steudel , et al. · 2015

Amorphous indium-gallium-zinc-oxide (a-IGZO) is demonstrated as an electron transport layer (ETL) in a high-performance organic photodetector (OPD). Dark current in the range of 10 nA/cm2 at a bias voltage of −2 V and a high photoresponse …

Charge transport and recombination in P3HT:PbS solar cells Open

Yuliar Firdaus, Erwin Vandenplas, Adis Khetubol, David Cheyns, Robert Gehlhaar , et al. · 2015

The charge carrier transport in thin film hybrid solar cells is analyzed and correlated with device performance and the mechanisms responsible for recombination loss. The hybrid bulk heterojunction consisted of a blend of poly(3-hexylthiop…

Absorptive carbon nanotube electrodes: Consequences of optical interference loss in thin film solar cells Open

Jeffrey G. Tait, Michaël De Volder, David Cheyns, Paul Heremans, Barry P. Rand · 2015

Ultrasonically spray coated carbon nanotube electrodes attain sheet resistances as low as 3.4 Ω □⁻¹ without post-deposition treatments. Organic solar cells achieve similar performance as those with silver electrodes, while simul…

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