Journal article 603 views 94 downloads
Subgap Absorption in Organic Semiconductors
,
Paul Meredith ,
Ardalan Armin
The Journal of Physical Chemistry Letters, Volume: 14, Issue: 13, Pages: 3174 - 3185
Swansea University Authors:
Nasim Zarrabi, Oskar Sandberg , Paul Meredith , Ardalan Armin
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...
| Published in: | The Journal of Physical Chemistry Letters |
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| ISSN: | 1948-7185 1948-7185 |
| Published: |
American Chemical Society (ACS)
2023
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| Online Access: |
Check full text
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa62804 |
| 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 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. |
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| College: |
Faculty of Science and Engineering |
| Funders: |
Llywodraeth Cymru; Swansea University; European Regional Development Fund |
| Issue: |
13 |
| Start Page: |
3174 |
| End Page: |
3185 |