File Download
There are no files associated with this item.
Links for fulltext
(May Require Subscription)
- Publisher Website: 10.1002/solr.202000789
- Scopus: eid_2-s2.0-85101413625
- WOS: WOS:000621047400001
- Find via
Supplementary
- Citations:
- Appears in Collections:
Article: Unraveling the Temperature Dependence of Exciton Dissociation and Free Charge Generation in Nonfullerene Organic Solar Cells
Title | Unraveling the Temperature Dependence of Exciton Dissociation and Free Charge Generation in Nonfullerene Organic Solar Cells |
---|---|
Authors | |
Issue Date | 2021 |
Publisher | Wiley - VCH Verlag GmbH & Co. KGaA. The Journal's web site is located at http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)2367-198X |
Citation | Solar RRL, 2021, v. 5 n. 4, p. article no. 2000789 How to Cite? |
Abstract | Organic solar cells based on nonfullerene acceptor molecules show high charge generation yields with negligible driving force at the donor–acceptor (D/A) interface to drive exciton dissociation. Understanding the underlying charge generation dynamics in these material systems is crucial for further development of this technology. Herein, the acceptor exciton dissociation dynamics in these materials is studied using transient optical spectroscopy. The results show that exciton dissociation at the D/A interface takes up to ≈100 ps to complete, and this process is not significantly affected by temperature. A similar timescale for charge transfer (CT) state separation into free electrons and holes is observed at room temperature. But in contrast to the weak temperature dependence of exciton dissociation, the free charge generation rate and yield are significantly reduced at low temperature. This suggests that overcoming the Coulomb barrier for charge separation at the D/A interface is the main reason for the endothermic charge separation observed for these material systems, instead of diffusion-limited exciton dissociation. |
Persistent Identifier | http://hdl.handle.net/10722/302066 |
ISSN | 2023 Impact Factor: 6.0 2023 SCImago Journal Rankings: 1.783 |
ISI Accession Number ID |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Ma, C | - |
dc.contributor.author | Chan, CCS | - |
dc.contributor.author | Zou, X | - |
dc.contributor.author | Yu, H | - |
dc.contributor.author | Zhang, J | - |
dc.contributor.author | Yan, H | - |
dc.contributor.author | Wong, KS | - |
dc.contributor.author | Chow, PCY | - |
dc.date.accessioned | 2021-08-21T03:31:04Z | - |
dc.date.available | 2021-08-21T03:31:04Z | - |
dc.date.issued | 2021 | - |
dc.identifier.citation | Solar RRL, 2021, v. 5 n. 4, p. article no. 2000789 | - |
dc.identifier.issn | 2367-198X | - |
dc.identifier.uri | http://hdl.handle.net/10722/302066 | - |
dc.description.abstract | Organic solar cells based on nonfullerene acceptor molecules show high charge generation yields with negligible driving force at the donor–acceptor (D/A) interface to drive exciton dissociation. Understanding the underlying charge generation dynamics in these material systems is crucial for further development of this technology. Herein, the acceptor exciton dissociation dynamics in these materials is studied using transient optical spectroscopy. The results show that exciton dissociation at the D/A interface takes up to ≈100 ps to complete, and this process is not significantly affected by temperature. A similar timescale for charge transfer (CT) state separation into free electrons and holes is observed at room temperature. But in contrast to the weak temperature dependence of exciton dissociation, the free charge generation rate and yield are significantly reduced at low temperature. This suggests that overcoming the Coulomb barrier for charge separation at the D/A interface is the main reason for the endothermic charge separation observed for these material systems, instead of diffusion-limited exciton dissociation. | - |
dc.language | eng | - |
dc.publisher | Wiley - VCH Verlag GmbH & Co. KGaA. The Journal's web site is located at http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)2367-198X | - |
dc.relation.ispartof | Solar RRL | - |
dc.rights | Submitted (preprint) Version This is the pre-peer reviewed version of the following article: [FULL CITE], which has been published in final form at [Link to final article using the DOI]. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. Accepted (peer-reviewed) Version This is the peer reviewed version of the following article: [FULL CITE], which has been published in final form at [Link to final article using the DOI]. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. | - |
dc.title | Unraveling the Temperature Dependence of Exciton Dissociation and Free Charge Generation in Nonfullerene Organic Solar Cells | - |
dc.type | Article | - |
dc.identifier.email | Chow, PCY: pcyc@hku.hk | - |
dc.identifier.authority | Chow, PCY=rp02699 | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1002/solr.202000789 | - |
dc.identifier.scopus | eid_2-s2.0-85101413625 | - |
dc.identifier.hkuros | 324165 | - |
dc.identifier.volume | 5 | - |
dc.identifier.issue | 4 | - |
dc.identifier.spage | article no. 2000789 | - |
dc.identifier.epage | article no. 2000789 | - |
dc.identifier.isi | WOS:000621047400001 | - |
dc.publisher.place | Germany | - |