Journal article 865 views 628 downloads
Thick junction broadband organic photodiodes
Ardalan Armin,
Mike Hambsch,
Il Ku Kim,
Paul L Burn,
Paul Meredith 
,
Ebinazar B Namdas
,
Ebinazar B Namdas
Laser & Photonics Reviews, Volume: 8, Issue: 6, Pages: 924 - 932
Swansea University Author:
Paul Meredith
-
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DOI (Published version): 10.1002/lpor.201400081
Abstract
Inorganic semiconductor-based broadband photodetectorsare ubiquitous in imaging technologies such as digitalcameras and photometers. Herein a broadband organic photodiode(OPD) that has performance metrics comparable orsuperior to inorganic photodiodes over the same spectral rangeis reported. The pho...
| Published in: | Laser & Photonics Reviews |
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| ISSN: | 18638880 |
| Published: |
2014
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa38600 |
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| Abstract: |
Inorganic semiconductor-based broadband photodetectorsare ubiquitous in imaging technologies such as digitalcameras and photometers. Herein a broadband organic photodiode(OPD) that has performance metrics comparable orsuperior to inorganic photodiodes over the same spectral rangeis reported. The photodiode with an active layer comprisedof a poly[N-9-heptadecanyl-2,7-carbazole-alt-5,5-(4,7-di-2-thienyl-2,1,3-benzothiadiazole)]:[6,6]-phenyl-C71-butyric acidmethyl ester bulk heterojunction blend had a dark current < 1nA/cm2, specific detectivity of ∼ 1013 Jones, reverse bias −3 dBfrequency response of 100 kHz to 1 MHz, and state-of-the-artLinear Dynamic Range for organic photodiodes of nine ordersof magnitude (180 dB). The key to these performance metricswas the use of a thick junction (700 nm), which flattened thespectral response, reduced the dark current and decreasedperformance variations. The strategy also provides a route tolarge area defect free “monolithic” structures for low noiseintegrated photo-sensing, position determination, or contact,non-focal imaging. |
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| College: |
Faculty of Science and Engineering |
| Issue: |
6 |
| Start Page: |
924 |
| End Page: |
932 |