Results 51 to 60 of about 67,272 (298)

Photoinduced Charge Separation in Single‐Component Squaraine Films: The Key Role of Electrostatic Disorder

Advanced Functional Materials, EarlyView.
ABSTRACT Neat films of organic dyes are an interesting technological platform for solar cells and photodetectors. Recently, the conventional biphasic bulk‐heterojunction paradigm for photoinduced charge separation was challenged by the observation that charge carriers can be photogenerated in single‐component materials. A comprehensive experimental and
Davide Giavazzi, João Pedro Ferreira Assunção, Michael Bauer, Matthias Diethelm, Wei‐Hsu Hu, Mohammad Jafarpour, Roland Widmer, Antonia Neels, Dimitrios Sapalidis, Bruno F. B. Silva, Roland Hany, Frank Nüesch, Anna Painelli   +12 more
wiley   +1 more source

Inverted p-down Design for High-Speed Photodetectors

Photonics, 2021
We discuss the structural consideration of high-speed photodetectors used for optical communications, focusing on vertical illumination photodetectors suitable for device fabrication and optical coupling.
Masahiro Nada, Fumito Nakajima, Toshihide Yoshimatsu, Yasuhiko Nakanishi, Atsushi Kanda, Takahiko Shindo, Shoko Tatsumi, Hideaki Matsuzaki, Kimikazu Sano   +8 more
doaj   +1 more source

Optical Detection of Cellular Signals at Material Interfaces

Advanced Healthcare Materials, EarlyView.
Emerging functional materials are transforming optical detection of cellular signals. This review highlights optical techniques that exploit the unique optical properties of diverse materials to detect and quantify cellular electrical, chemical, and mechanical signals, and discusses key opportunities and challenges.
Xuchen Ren, Jitong Ren, Zixin Zhang, Koney Eungkon Kim, Francis L. Hong, Yuecheng Peter Zhou   +5 more
wiley   +1 more source

Quarter-Annulus Si-Photodetector with Equal Inner and Outer Radii of Curvature for Reflective Photoplethysmography Sensors

Biosensors
Reflection-type photoplethysmography (PPG) pulse sensors used in wearable smart watches, true wireless stereo, etc., have been recently considered a key component for monitoring biological signals such as heart rate, SPO3, and blood pressure.
Yeeun Na, Chaehwan Kim, Keunhoi Kim, Tae Hyun Kim, Soo Hyun Kwon, Il-Suk Kang, Young Woo Jung, Tae Won Kim, Deok-Ho Cho, Jihwan An, Jong-Kwon Lee, Jongcheol Park   +11 more
doaj   +1 more source

Design and Characterization of 5 μm Pitch InGaAs Photodiodes Using In Situ Doping and Shallow Mesa Architecture for SWIR Sensing

Sensors, 2023
This paper presents the complete design, fabrication, and characterization of a shallow-mesa photodiode for short-wave infra-red (SWIR) sensing. We characterized and demonstrated photodiodes collecting 1.55 μm photons with a pixel pitch as small as 3 μm.
Jules Tillement, Cyril Cervera, Jacques Baylet, Christophe Jany, François Nardelli, Thomas Di Rito, Sylvain Georges, Gabriel Mugny, Olivier Saxod, Olivier Gravrand, Thierry Baron, François Roy, Frédéric Boeuf   +12 more
doaj   +1 more source

Bioinspired Adaptive Sensors: A Review on Current Developments in Theory and Application

Advanced Materials, EarlyView.
This review comprehensively summarizes the recent progress in the design and fabrication of sensory‐adaptation‐inspired devices and highlights their valuable applications in electronic skin, wearable electronics, and machine vision. The existing challenges and future directions are addressed in aspects such as device performance optimization ...
Guodong Gong, You Zhou, Qingxiu Li, Wenyu Zhao, Sunyingyue Geng, Hangfei Li, Yan‐Bing Leng, Shirui Zhu, Guanglong Ding, Yongbiao Zhai, Ziyu Lv, Ye Zhou, Su‐Ting Han   +12 more
wiley   +1 more source

Characteristics of photodiodes with «intrinsic oxide — InSe» structure, irradiated with high-energy electrons

Технологія та конструювання в електронній апаратурі, 2012
The article describes the research of the influence of electrons with an effective energy of 12 MeV in the 0,33–33 Mrad dose range on the electrical and photovoltaic properties of photodiodes with «intrinsic oxide — p-InSe» structure.
O. N. Sydor, O. A. Sydor, Z. D. Kovalyuk, V. I. Dubinko   +3 more
doaj  

Decoration of Poly-3-methyl Aniline with As(III) Oxide and Hydroxide as an Effective Photoelectrode for Electroanalytical Photon Sensing with Photodiode-like Behavior

Micromachines, 2023
This study achieved the decoration of poly-3-methyl aniline (P3MA) with As2O3–As(OH)3 using K2S2O8 and NaAsO2 on the 3-methyl aniline monomer. This resulted in a highly porous nanocomposite polymer composite with wide absorption optical behavior, an ...
Mohamed Rabia, Asmaa M. Elsayed, Maha Abdallah Alnuwaiser   +2 more
doaj   +1 more source

Single‐Chromophore Homojunction Organic Solar Cells: A Path to Simplicity and Efficiency

Advanced Materials, EarlyView.
This perspective discusses how the intrinsic optoelectronic properties of organic semiconductors, their molecular packing in the solid‐state, and internal energetic gradients within a device can enable free‐charge carrier generation in homojunction organic solar cells.
Shaun McAnally, Paul L. Burn, Paul E. Shaw   +2 more
wiley   +1 more source

Photodiode based on GaP sensitized to short-wave region of UV spectrum

Технологія та конструювання в електронній апаратурі, 2012
An algorithm for the simulation and analysis of the parameters that determine the sensitivity of the photodiode surface-barrier structures based on n+–n-GaP–SnO2(F) has been developed.
Yu. G. Dobrovol’skii
doaj