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Subgap Absorption in Organic Semiconductors

Nasim Zarrabi, Oskar Sandberg Orcid Logo, Paul Meredith Orcid Logo, Ardalan Armin Orcid Logo

The Journal of Physical Chemistry Letters, Volume: 14, Issue: 13, Pages: 3174 - 3185

Swansea University Authors: Nasim Zarrabi, Oskar Sandberg Orcid Logo, Paul Meredith Orcid Logo, Ardalan Armin Orcid Logo

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DOI (Published version): 10.1021/acs.jpclett.3c00021

Abstract

Organic semiconductors have found a broad range of application in areas such as light emission, photovoltaics, and optoelectronics. The active components in such devices are based on molecular and polymeric organic semiconductors, where the density of states is generally determined by the disordered...

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Published in: The Journal of Physical Chemistry Letters
ISSN: 1948-7185 1948-7185
Published: American Chemical Society (ACS) 2023
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URI: https://cronfa.swan.ac.uk/Record/cronfa62804
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last_indexed 2023-04-14T03:23:29Z
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spelling v2 62804 2023-03-06 Subgap Absorption in Organic Semiconductors d20976a5892074dae0368a4bb4433f76 Nasim Zarrabi Nasim Zarrabi true false 9e91512a54d5aee66cd77851a96ba747 0000-0003-3778-8746 Oskar Sandberg Oskar Sandberg true false 31e8fe57fa180d418afd48c3af280c2e 0000-0002-9049-7414 Paul Meredith Paul Meredith true false 22b270622d739d81e131bec7a819e2fd 0000-0002-6129-5354 Ardalan Armin Ardalan Armin true false 2023-03-06 SPH Organic semiconductors have found a broad range of application in areas such as light emission, photovoltaics, and optoelectronics. The active components in such devices are based on molecular and polymeric organic semiconductors, where the density of states is generally determined by the disordered nature of the molecular solid rather than energy bands. Inevitably, there exist states within the energy gap which may include tail states, deep traps caused by unavoidable impurities and defects, as well as intermolecular states due to (radiative) charge transfer states. In this Perspective, we first summarize methods to determine the absorption features due to the subgap states. We then explain how subgap states can be parametrized based upon the subgap spectral line shapes. We finally describe the role of subgap states in the performance metrics of organic semiconductor devices from a thermodynamic viewpoint. Journal Article The Journal of Physical Chemistry Letters 14 13 3174 3185 American Chemical Society (ACS) 1948-7185 1948-7185 6 4 2023 2023-04-06 10.1021/acs.jpclett.3c00021 http://dx.doi.org/10.1021/acs.jpclett.3c00021 COLLEGE NANME Physics COLLEGE CODE SPH Swansea University SU Library paid the OA fee (TA Institutional Deal) Llywodraeth Cymru; Swansea University; European Regional Development Fund 2023-04-20T16:48:17.8225237 2023-03-06T15:35:17.3742924 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics Nasim Zarrabi 1 Oskar Sandberg 0000-0003-3778-8746 2 Paul Meredith 0000-0002-9049-7414 3 Ardalan Armin 0000-0002-6129-5354 4 62804__27020__a0dc3d406c694117b43b5cf10de6ea1e.pdf 62804.pdf 2023-04-12T14:04:52.1307419 Output 7103818 application/pdf Version of Record true Published under a Creative Commons license, CC-BY true eng http://creativecommons.org/licenses/by/4.0/
title Subgap Absorption in Organic Semiconductors
spellingShingle Subgap Absorption in Organic Semiconductors
Nasim Zarrabi
Oskar Sandberg
Paul Meredith
Ardalan Armin
title_short Subgap Absorption in Organic Semiconductors
title_full Subgap Absorption in Organic Semiconductors
title_fullStr Subgap Absorption in Organic Semiconductors
title_full_unstemmed Subgap Absorption in Organic Semiconductors
title_sort Subgap Absorption in Organic Semiconductors
author_id_str_mv d20976a5892074dae0368a4bb4433f76
9e91512a54d5aee66cd77851a96ba747
31e8fe57fa180d418afd48c3af280c2e
22b270622d739d81e131bec7a819e2fd
author_id_fullname_str_mv d20976a5892074dae0368a4bb4433f76_***_Nasim Zarrabi
9e91512a54d5aee66cd77851a96ba747_***_Oskar Sandberg
31e8fe57fa180d418afd48c3af280c2e_***_Paul Meredith
22b270622d739d81e131bec7a819e2fd_***_Ardalan Armin
author Nasim Zarrabi
Oskar Sandberg
Paul Meredith
Ardalan Armin
author2 Nasim Zarrabi
Oskar Sandberg
Paul Meredith
Ardalan Armin
format Journal article
container_title The Journal of Physical Chemistry Letters
container_volume 14
container_issue 13
container_start_page 3174
publishDate 2023
institution Swansea University
issn 1948-7185
1948-7185
doi_str_mv 10.1021/acs.jpclett.3c00021
publisher American Chemical Society (ACS)
college_str Faculty of Science and Engineering
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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/10.1021/acs.jpclett.3c00021
document_store_str 1
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description Organic semiconductors have found a broad range of application in areas such as light emission, photovoltaics, and optoelectronics. The active components in such devices are based on molecular and polymeric organic semiconductors, where the density of states is generally determined by the disordered nature of the molecular solid rather than energy bands. Inevitably, there exist states within the energy gap which may include tail states, deep traps caused by unavoidable impurities and defects, as well as intermolecular states due to (radiative) charge transfer states. In this Perspective, we first summarize methods to determine the absorption features due to the subgap states. We then explain how subgap states can be parametrized based upon the subgap spectral line shapes. We finally describe the role of subgap states in the performance metrics of organic semiconductor devices from a thermodynamic viewpoint.
published_date 2023-04-06T16:48:16Z
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