Thick junction broadband organic photodiodes

Armin, Ardalan, Hambsch, Mike, Kim, Il Ku, Burn, Paul L., Meredith, Paul and Namdas, Ebinazar B. (2014) Thick junction broadband organic photodiodes. Laser and Photonics Reviews, 8 6: 924-932. doi:10.1002/lpor.201400081


Author Armin, Ardalan
Hambsch, Mike
Kim, Il Ku
Burn, Paul L.
Meredith, Paul
Namdas, Ebinazar B.
Title Thick junction broadband organic photodiodes
Journal name Laser and Photonics Reviews   Check publisher's open access policy
ISSN 1863-8880
1863-8899
Publication date 2014-07-31
Sub-type Article (original research)
DOI 10.1002/lpor.201400081
Open Access Status
Volume 8
Issue 6
Start page 924
End page 932
Total pages 9
Place of publication Weinheim, Germany
Publisher Wiley - V C H Verlag
Collection year 2015
Language eng
Abstract Inorganic semiconductor-based broadband photodetectors are ubiquitous in imaging technologies such as digital cameras and photometers. Herein a broadband organic photodiode (OPD) that has performance metrics comparable or superior to inorganic photodiodes over the same spectral range is reported. The photodiode with an active layer comprised of 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 acid methyl ester bulk heterojunction blend had a dark current < 1 nA/cm2, specific detectivity of ∼1013 Jones, reverse bias -3 dB frequency response of 100 kHz to 1 MHz, and state-of-the-art Linear Dynamic Range for organic photodiodes of nine orders of magnitude (180 dB). The key to these performance metrics was the use of a thick junction (700 nm), which flattened the spectral response, reduced the dark current and decreased performance variations. The strategy also provides a route to large area defect free "monolithic" structures for low noise integrated photo-sensing, position determination, or contact, non-focal imaging.
Keyword Broadband photodiodes
Large area photodiodes
Micro-cavities
Organic photodiodes
Thick bulk heterojunctions
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Official 2015 Collection
School of Chemistry and Molecular Biosciences
 
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Created: Fri, 01 Aug 2014, 11:16:43 EST by Mrs Louise Nimwegen on behalf of School of Chemistry & Molecular Biosciences