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

2018 ◽  
Vol 6 (43) ◽  
pp. 11645-11650 ◽  
Author(s):  
Frederik Verstraeten ◽  
Sam Gielen ◽  
Pieter Verstappen ◽  
Jurgen Kesters ◽  
Epimitheas Georgitzikis ◽  
...  
Keyword(s):  
Near Infrared ◽  
Broadband Absorption ◽  
Organic Photodetectors ◽  
Dark Currents

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.

An ordered copper nanowell-array film with near-perfect broadband absorption from ultraviolet to near-infrared light

2020 ◽  
Vol 59 (11) ◽  
pp. 110906
Author(s):  
Juan Shen ◽  
Yong Ren ◽  
Xinxin Zhu ◽  
Min Mao ◽  
Quan Zhou ◽  
...  
Keyword(s):  
Near Infrared ◽  
Infrared Light ◽  
Near Infrared Light ◽  
Broadband Absorption

scholarly journals Broadband Absorption in Patterned Metal/Weakly-Absorbing-Spacer/Metal with Graded Photonic Super-Crystal

Photonics ◽  
2021 ◽  
Vol 8 (4) ◽  
pp. 114
Author(s):  
Steve Kamau ◽  
Safaa Hassan ◽  
Khadijah Alnasser ◽  
Hualiang Zhang ◽  
Jingbiao Cui ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Surface Plasmon Polariton ◽  
Near Infrared ◽  
Broadband Absorption ◽  
Au Film ◽  
Fabry Perot ◽  
Absorbing Material ◽  
Multiple Band ◽  
Band Absorption ◽  
Plasmon Polaritons

It is challenging to realize the complete broadband absorption of near-infrared in thin optical devices. In this paper, we studied high light absorption in two devices: a stack of Au-pattern/insulator/Au-film and a stack of Au-pattern/weakly-absorbing-material/Au-film where the Au-pattern was structured in graded photonic super-crystal. We observed multiple-band absorption, including one near 1500 nm, in a stack of Au-pattern/spacer/Au-film. The multiple-band absorption is due to the gap surface plasmon polariton when the spacer thickness is less than 30 nm. Broadband absorption appears in the near-infrared when the insulator spacer is replaced by a weakly absorbing material. E-field intensity was simulated and confirmed the formation of gap surface plasmon polaritons and their coupling with Fabry–Pérot resonance.

scholarly journals Stacked Dual‐Wavelength Near‐Infrared Organic Photodetectors

2020 ◽  
pp. 2001784
Author(s):  
Yazhong Wang ◽  
Bernhard Siegmund ◽  
Zheng Tang ◽  
Zaifei Ma ◽  
Jonas Kublitski ◽  
...  
Keyword(s):  
Near Infrared ◽  
Dual Wavelength ◽  
Organic Photodetectors

scholarly journals Enhancing sub-bandgap external quantum efficiency by photomultiplication for narrowband organic near-infrared photodetectors

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Jonas Kublitski ◽  
Axel Fischer ◽  
Shen Xing ◽  
Lukasz Baisinger ◽  
Eva Bittrich ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Near Infrared ◽  
Optical Cavity ◽  
Hole Injection ◽  
Visible Range ◽  
Absorption Region ◽  
Electromagnetic Signals ◽  
Organic Photodetectors

AbstractDetection of electromagnetic signals for applications such as health, product quality monitoring or astronomy requires highly responsive and wavelength selective devices. Photomultiplication-type organic photodetectors have been shown to achieve high quantum efficiencies mainly in the visible range. Much less research has been focused on realizing near-infrared narrowband devices. Here, we demonstrate fully vacuum-processed narrow- and broadband photomultiplication-type organic photodetectors. Devices are based on enhanced hole injection leading to a maximum external quantum efficiency of almost 2000% at −10 V for the broadband device. The photomultiplicative effect is also observed in the charge-transfer state absorption region. By making use of an optical cavity device architecture, we enhance the charge-transfer response and demonstrate a wavelength tunable narrowband photomultiplication-type organic photodetector with external quantum efficiencies superior to those of pin-devices. The presented concept can further improve the performance of photodetectors based on the absorption of charge-transfer states, which were so far limited by the low external quantum efficiency provided by these devices.

scholarly journals Ultraflexible Near-Infrared Organic Photodetectors for Conformal Photoplethysmogram Sensors

2018 ◽  
Vol 30 (34) ◽  
pp. 1802359 ◽  
Author(s):  
Sungjun Park ◽  
Kenjiro Fukuda ◽  
Ming Wang ◽  
Chulhyo Lee ◽  
Tomoyuki Yokota ◽  
...  
Keyword(s):  
Near Infrared ◽  
Organic Photodetectors

Ultraviolet to near-infrared broadband organic photodetectors with photomultiplication

2020 ◽  
Vol 83 ◽  
pp. 105739 ◽  
Author(s):  
Kaixuan Yang ◽  
Jian Wang ◽  
Zijin Zhao ◽  
Fenggui Zhao ◽  
Kai Wang ◽  
...  
Keyword(s):  
Near Infrared ◽  
Organic Photodetectors

scholarly journals Silicon Meets Graphene for a New Family of Near-Infrared Schottky Photodetectors

2019 ◽  
Vol 9 (18) ◽  
pp. 3677 ◽  
Author(s):  
Maurizio Casalino
Keyword(s):  
Near Infrared ◽  
Infrared Photodetectors ◽  
Strong Light ◽  
Broadband Absorption ◽  
New Family ◽  
High Carrier Mobility ◽  
Light Matter Interaction ◽  
High Carrier ◽  
Schottky Junctions

In recent years, graphene has attracted much interest due to its unique properties of flexibility, strong light-matter interaction, high carrier mobility and broadband absorption. In addition, graphene can be deposited on many substrates including silicon with which is able to form Schottky junctions, opening the path to the realization of near-infrared photodetectors based on the internal photoemission effect where graphene plays the role of the metal. In this work, we review the very recent progress of the near-infrared photodetectors based on Schottky junctions involving graphene. This new family of device promises to overcome the limitations of the Schottky photodetectors based on metals showing the potentialities to compare favorably with germanium photodetectors currently employed in silicon photonics.

High-Sensitivity Visible–Near Infrared Organic Photodetectors Based on Non-Fullerene Acceptors

2020 ◽  
Vol 12 (15) ◽  
pp. 17769-17775 ◽  
Author(s):  
Guanghong Liu ◽  
Tengfei Li ◽  
Xiaowei Zhan ◽  
Hongbin Wu ◽  
Yong Cao
Keyword(s):  
Near Infrared ◽  
High Sensitivity ◽  
Organic Photodetectors

Recent advances in organic near-infrared photodiodes

2018 ◽  
Vol 6 (14) ◽  
pp. 3499-3513 ◽  
Author(s):  
Xiaodong Liu ◽  
Yiwei Lin ◽  
Yingjie Liao ◽  
Jiazun Wu ◽  
Yonghao Zheng
Keyword(s):  
Electronic Properties ◽  
Organic Semiconductors ◽  
Near Infrared ◽  
Recent Advances ◽  
Infrared Photodiodes ◽  
Organic Photodetectors

Both broadband and narrowband organic photodetectors can be realized due to the easily tunable optical/electronic properties of organic semiconductors.

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