scholarly journals Near infrared organic photodetectors based on enhanced charge transfer state absorption by photonic architectures

2020 ◽  
Vol 8 (28) ◽  
pp. 9688-9696
Author(s):  
Martí Gibert-Roca ◽  
Pau Molet ◽  
Agustín Mihi ◽  
Mariano Campoy-Quiles
Keyword(s):  
Charge Transfer ◽  
Photonic Crystal ◽  
Band Gap ◽  
Active Layer ◽  
Near Infrared ◽  
Lattice Parameter ◽  
Charge Transfer State ◽  
Solution Processed ◽  
Organic Photodetectors ◽  
Transfer State

Solution processed organic photodetectors with a nanostructured active layer in the shape of a photonic crystal exhibit an improved NIR response, below the band gap of the active layer materials, that can be tuned by varying the lattice parameter. 

High-performing D–π–A–π–D benzothiadiazole-based hybrid local and charge-transfer emitters in solution-processed OLEDs

2020 ◽  
Vol 8 (47) ◽  
pp. 17009-17015
Author(s):  
Indu Bala ◽  
Rohit Ashok Kumar Yadav ◽  
Manisha Devi ◽  
Joydip De ◽  
Nitya Singh ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Charge Transfer State ◽  
Solution Processed ◽  
High Performing ◽  
Donor Acceptor ◽  
Transfer State

Benzothiadiazole-based donor–acceptor emitters with hybrid local and charge transfer state exhibit high external quantum efficiency in solution-processed green OLEDs.

Relating open-circuit voltage losses to the active layer morphology and contact selectivity in organic solar cells

2018 ◽  
Vol 6 (26) ◽  
pp. 12574-12581 ◽  
Author(s):  
Zheng Tang ◽  
Jing Wang ◽  
Armantas Melianas ◽  
Yang Wu ◽  
Renee Kroon ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
Active Layer ◽  
Organic Solar Cells ◽  
Open Circuit Voltage ◽  
Open Circuit ◽  
Charge Transfer State ◽  
Open Circuit Voltages ◽  
Transfer State

By manipulating the active-layer morphologies in OSCs, we achieve different open-circuit-voltages without affecting the energy of charge-transfer state.

Rearrangement of an aniline linked perylene bisimide under acidic conditions and visible to near-infrared emission from the intramolecular charge-transfer state of its fused derivatives

2017 ◽  
Vol 53 (42) ◽  
pp. 5698-5701 ◽  
Author(s):  
Mitsuru Kojima ◽  
Akira Tamoto ◽  
Naoki Aratani ◽  
Hiroko Yamada
Keyword(s):  
Charge Transfer ◽  
Near Infrared ◽  
Intramolecular Charge Transfer ◽  
Infrared Emission ◽  
Charge Transfer State ◽  
Perylene Bisimide ◽  
Acidic Conditions ◽  
Perylene Bisimides ◽  
Near Infrared Emission ◽  
Transfer State

We have prepared a series of aniline-linked and fused perylene bisimides (PBIs) for making near-infrared (NIR) fluorophores.

Understanding the Charge-Transfer State and Singlet Exciton Emission from Solution-Processed Small-Molecule Organic Solar Cells

2014 ◽  
Vol 26 (43) ◽  
pp. 7405-7412 ◽  
Author(s):  
Niva A. Ran ◽  
Martijn Kuik ◽  
John A. Love ◽  
Christopher M. Proctor ◽  
Ikuhiro Nagao ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Charge Transfer State ◽  
Solution Processed ◽  
Exciton Emission ◽  
Singlet Exciton ◽  
Transfer State

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.

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