Perovskite/Polymer Hybrid Thin Films for High External Quantum Efficiency Photodetectors with Wide Spectral Response from Visible to Near-Infrared Wavelengths

2017 ◽  
Vol 5 (12) ◽  
pp. 1700213 ◽  
Author(s):  
Yukun Wang ◽  
Dezhi Yang ◽  
Xiaokang Zhou ◽  
Dongge Ma ◽  
Agafonov Vadim ◽  
...  
Keyword(s):  
Thin Films ◽  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Near Infrared ◽  
Spectral Response ◽  
Polymer Hybrid ◽  
Hybrid Thin Films ◽  
Infrared Wavelengths

scholarly journals Perovskite-polymer hybrid solar cells with near-infrared external quantum efficiency over 40%

2015 ◽  
Vol 58 (12) ◽  
pp. 953-960 ◽  
Author(s):  
Long Ye ◽  
Benhu Fan ◽  
Shaoqing Zhang ◽  
Sunsun Li ◽  
Bei Yang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Near Infrared ◽  
Hybrid Solar Cells ◽  
Polymer Hybrid

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 Highly Efficient Near-Infrared Detector Based on Optically Resonant Dielectric Nanodisks

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 428
Author(s):  
Reza Masoudian Saadabad ◽  
Christian Pauly ◽  
Norbert Herschbach ◽  
Dragomir N. Neshev ◽  
Haroldo T. Hattori ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
High Speed ◽  
Near Infrared ◽  
Infrared Detector ◽  
High Quantum Efficiency ◽  
Fast Detection ◽  
High Quantum ◽  
Resonant Modes ◽  
Infrared Wavelengths ◽  
Dielectric Metasurface

Fast detection of near-infrared (NIR) photons with high responsivity remains a challenge for photodetectors. Germanium (Ge) photodetectors are widely used for near-infrared wavelengths but suffer from a trade-off between the speed of photodetection and quantum efficiency (or responsivity). To realize a high-speed detector with high quantum efficiency, a small-sized photodetector efficiently absorbing light is required. In this paper, we suggest a realization of a dielectric metasurface made of an array of subwavelength germanium PIN photodetectors. Due to the subwavelength size of each pixel, a high-speed photodetector with a bandwidth of 65 GHz has been achieved. At the same time, high quantum efficiency for near-infrared illumination can be obtained by the engineering of optical resonant modes to localize optical energy inside the intrinsic Ge disks. Furthermore, small junction capacitance and the possibility of zero/low bias operation have been shown. Our results show that all-dielectric metasurfaces can improve the performance of photodetectors.

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%.

Blue-violet photoluminescence from amorphous Si-in-SiNx thin films with external quantum efficiency in percentages

2006 ◽  
Vol 88 (9) ◽  
pp. 093102 ◽  
Author(s):  
L. B. Ma ◽  
R. Song ◽  
Y. M. Miao ◽  
C. R. Li ◽  
Y. Q. Wang ◽  
...  
Keyword(s):  
Thin Films ◽  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Amorphous Si

Fabrication of Conjugated Polymer Hybrid Thin Films with Radially Oriented Aluminosilicate Nanofibers by Spin-Assembly

2008 ◽  
Vol 81 (12) ◽  
pp. 1663-1668 ◽  
Author(s):  
Nattha Jiravanichanun ◽  
Kazuya Yamamoto ◽  
Hiroaki Yonemura ◽  
Sunao Yamada ◽  
Hideyuki Otsuka ◽  
...  
Keyword(s):  
Thin Films ◽  
Conjugated Polymer ◽  
Polymer Hybrid ◽  
Hybrid Thin Films

scholarly journals Structure and chemical stability in perovskite–polymer hybrid photovoltaic materials

2019 ◽  
Vol 7 (4) ◽  
pp. 1687-1699 ◽  
Author(s):  
Daniel J. Fairfield ◽  
Hiroaki Sai ◽  
Ashwin Narayanan ◽  
James V. Passarelli ◽  
Michelle Chen ◽  
...  
Keyword(s):  
Thin Films ◽  
Chemical Stability ◽  
Environmental Conditions ◽  
Polymer Hybrid ◽  
Photovoltaic Materials ◽  
Hybrid Thin Films ◽  
Improved Stability

Chemical and morphological origins of the improved stability in various polymer–perovskite hybrid thin films under ambient environmental conditions are investigated.

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