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Cavity Enhanced Organic Photodiodes with Charge Collection Narrowing

Aren Yazmaciyan, Paul Meredith Orcid Logo, Ardalan Armin Orcid Logo

Advanced Optical Materials, Volume: 7, Issue: 8, Start page: 1801543

Swansea University Authors: Paul Meredith Orcid Logo, Ardalan Armin Orcid Logo

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DOI (Published version): 10.1002/adom.201801543

Abstract

Color discrimination in photodetection is conventionally achieved using broadband-absorbing inorganic semiconductors with passive optical filters. Organic semiconductors show promise to deliver narrowband spectral responses due to their tunable optical properties. While achieving narrow-absorbing or...

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Published in: Advanced Optical Materials
ISSN: 2195-1071 2195-1071
Published: Wiley 2019
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URI: https://cronfa.swan.ac.uk/Record/cronfa48973
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first_indexed 2019-02-25T19:55:35Z
last_indexed 2019-03-29T12:37:57Z
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spelling v2 48973 2019-02-25 Cavity Enhanced Organic Photodiodes with Charge Collection Narrowing 31e8fe57fa180d418afd48c3af280c2e 0000-0002-9049-7414 Paul Meredith Paul Meredith true false 22b270622d739d81e131bec7a819e2fd 0000-0002-6129-5354 Ardalan Armin Ardalan Armin true false 2019-02-25 SPH Color discrimination in photodetection is conventionally achieved using broadband-absorbing inorganic semiconductors with passive optical filters. Organic semiconductors show promise to deliver narrowband spectral responses due to their tunable optical properties. While achieving narrow-absorbing organic semiconductors is an ongoing endeavor in the synthetic chemistry community, charge collection narrowing is introduced as a “material-agnostic” technique to realize narrowband spectral responses using broadband absorbers such as blends of organic semiconductors, inorganic nanocrystals, and perovskites in a photodiode architecture. Charge collection narrowing in organic semiconductors demands photoactive junction thicknesses on the order of a few micrometers causing fabrication difficulties and limitations in device metrics such as frequency bandwidth. In this work it is shown that electrical inversion can result in charge collection narrowing in organic photodiodes with active layer thicknesses on the order of hundreds of nanometers and hence much easier to achieve via high throughput solution processing techniques.Additionally, it is shown that an indium tin oxide/gold electrode with modified work function acts as a cavity mirror, further narrowing the spectral response and at the same time delivering an extremely selective cathode, suppressing the dark current dramatically. Nearly voltage independent detectivities of 1013 Jones are achieved with an active sensing area of 0.2 cm2. Journal Article Advanced Optical Materials 7 8 1801543 Wiley 2195-1071 2195-1071 1 4 2019 2019-04-01 10.1002/adom.201801543 http://dx.doi.org/10.1002/adom.201801543 COLLEGE NANME Physics COLLEGE CODE SPH Swansea University 2023-05-22T11:46:12.4817671 2019-02-25T13:26:35.7835598 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics Aren Yazmaciyan 1 Paul Meredith 0000-0002-9049-7414 2 Ardalan Armin 0000-0002-6129-5354 3 0048973-25022019132737.pdf manuscriptresubmitted.pdf 2019-02-25T13:27:37.1370000 Output 1387365 application/pdf Accepted Manuscript true 2020-02-17T00:00:00.0000000 true eng
title Cavity Enhanced Organic Photodiodes with Charge Collection Narrowing
spellingShingle Cavity Enhanced Organic Photodiodes with Charge Collection Narrowing
Paul Meredith
Ardalan Armin
title_short Cavity Enhanced Organic Photodiodes with Charge Collection Narrowing
title_full Cavity Enhanced Organic Photodiodes with Charge Collection Narrowing
title_fullStr Cavity Enhanced Organic Photodiodes with Charge Collection Narrowing
title_full_unstemmed Cavity Enhanced Organic Photodiodes with Charge Collection Narrowing
title_sort Cavity Enhanced Organic Photodiodes with Charge Collection Narrowing
author_id_str_mv 31e8fe57fa180d418afd48c3af280c2e
22b270622d739d81e131bec7a819e2fd
author_id_fullname_str_mv 31e8fe57fa180d418afd48c3af280c2e_***_Paul Meredith
22b270622d739d81e131bec7a819e2fd_***_Ardalan Armin
author Paul Meredith
Ardalan Armin
author2 Aren Yazmaciyan
Paul Meredith
Ardalan Armin
format Journal article
container_title Advanced Optical Materials
container_volume 7
container_issue 8
container_start_page 1801543
publishDate 2019
institution Swansea University
issn 2195-1071
2195-1071
doi_str_mv 10.1002/adom.201801543
publisher Wiley
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Physics{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Physics
url http://dx.doi.org/10.1002/adom.201801543
document_store_str 1
active_str 0
description Color discrimination in photodetection is conventionally achieved using broadband-absorbing inorganic semiconductors with passive optical filters. Organic semiconductors show promise to deliver narrowband spectral responses due to their tunable optical properties. While achieving narrow-absorbing organic semiconductors is an ongoing endeavor in the synthetic chemistry community, charge collection narrowing is introduced as a “material-agnostic” technique to realize narrowband spectral responses using broadband absorbers such as blends of organic semiconductors, inorganic nanocrystals, and perovskites in a photodiode architecture. Charge collection narrowing in organic semiconductors demands photoactive junction thicknesses on the order of a few micrometers causing fabrication difficulties and limitations in device metrics such as frequency bandwidth. In this work it is shown that electrical inversion can result in charge collection narrowing in organic photodiodes with active layer thicknesses on the order of hundreds of nanometers and hence much easier to achieve via high throughput solution processing techniques.Additionally, it is shown that an indium tin oxide/gold electrode with modified work function acts as a cavity mirror, further narrowing the spectral response and at the same time delivering an extremely selective cathode, suppressing the dark current dramatically. Nearly voltage independent detectivities of 1013 Jones are achieved with an active sensing area of 0.2 cm2.
published_date 2019-04-01T11:46:11Z
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score 11.016235

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