Ultrathin Bi2O2S nanosheet near-infrared photodetectors

Nanoscale ◽  
2020 ◽  
Vol 12 (30) ◽  
pp. 16285-16291 ◽  
Author(s):  
Basant Chitara ◽  
Tej B. Limbu ◽  
Jason D. Orlando ◽  
Yongan Tang ◽  
Fei Yan
Keyword(s):  
Quantum Efficiency ◽  
Dark Current ◽  
External Quantum Efficiency ◽  
Near Infrared ◽  
High Efficiency ◽  
Infrared Photodetectors ◽  
Current Ratio ◽  
Solution Processed

Solution-processed Bi2O2S nanosheets demonstrate high-efficiency NIR photodetection with a responsivity of 4 A/W, an external quantum efficiency of 630%, and a normalized photocurrent-to-dark-current ratio of 1.3 × 1010 per watt.

High-efficiency near-infrared fluorescent organic light-emitting diodes with small efficiency roll-off based on AIE-active phenanthro[9,10-d]imidazole derivatives

2020 ◽  
Vol 8 (20) ◽  
pp. 6883-6890 ◽  
Author(s):  
Futong Liu ◽  
Yongbo Tan ◽  
Hui Liu ◽  
Xiangyang Tang ◽  
Lei Gao ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Near Infrared ◽  
High Efficiency ◽  
Organic Light Emitting Diodes ◽  
Strong Fluorescence ◽  
Light Emitting ◽  
Photoluminescence Quantum Yield ◽  
Organic Light

PIBz-3-PTZ exhibits strong fluorescence with a photoluminescence quantum yield of 35% in films. The nondoped device achieves a maximum external quantum efficiency of 2.02% peaking at 672 nm with small efficiency roll-off.

High-efficiency solution-processed OLEDs based on cationic Ag6Cu heteroheptanuclear cluster complexes with aromatic acetylides

2016 ◽  
Vol 4 (9) ◽  
pp. 1787-1794 ◽  
Author(s):  
Liang-Jin Xu ◽  
Xu Zhang ◽  
Jin-Yun Wang ◽  
Zhong-Ning Chen
Keyword(s):  
Current Efficiency ◽  
Quantum Efficiency ◽  
Bias Voltage ◽  
External Quantum Efficiency ◽  
High Efficiency ◽  
Solution Processed ◽  
Cluster Complexes ◽  
Highly Efficient ◽  
A Current

Strongly phosphorescent cationic Ag6Cu cluster complexes show highly efficient electroluminescence from solution-processed OLEDs with a current efficiency of 42.5 cd A−1 and an external quantum efficiency of 13.9% at a low bias voltage (4.5 V).

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.

Ultra high-efficiency multi-photon emission blue phosphorescent OLEDs with external quantum efficiency exceeding 40%

2012 ◽  
Vol 13 (11) ◽  
pp. 2615-2619 ◽  
Author(s):  
Hisahiro Sasabe ◽  
Kazuhiro Minamoto ◽  
Yong-Jin Pu ◽  
Masakatsu Hirasawa ◽  
Junji Kido
Keyword(s):  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
High Efficiency ◽  
Photon Emission ◽  
Blue Phosphorescent

An oligocarbazole-encapsulated heteroleptic red iridium complex for solution-processed nondoped phosphorescent organic light-emitting diodes with over 10% external quantum efficiency

2017 ◽  
Vol 5 (23) ◽  
pp. 5749-5756 ◽  
Author(s):  
Lingcheng Chen ◽  
Shumeng Wang ◽  
Zhimin Yan ◽  
Junqiao Ding ◽  
Lixiang Wang
Keyword(s):  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Iridium Complex ◽  
Solution Processed ◽  
Light Emitting ◽  
Organic Light

By fully encapsulating the heteroleptic red Ir complex with carbazole dendrons, solution-processed nondoped electrophosphorescent devices reveal over 10% EQE.

Air-processed stable near-infrared Si-based perovskite light-emitting devices with efficiency exceeding 7.5%

2022 ◽  
Author(s):  
Xiaoxiao Xu ◽  
Ke Xiao ◽  
Guozhi Hou ◽  
Yu Zhu ◽  
Ting Zhu ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Near Infrared ◽  
Ambient Air ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Composite Layers

Two composite layers are used to enhance the efficiency of Si-based near-infrared perovskite light-emitting devices, which are produced in ambient air, and the external quantum efficiency increased to 7.5%.

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