A comparison of charge separation dynamics in organic blend films employing fullerene and perylene diimide electron acceptors

Shoaee, Safa, Deledalle, Florent, Tuladhar, Pabitra Shakya, Shivanna, Ravichandran, Rajaram, Sridhar, Narayan, K. S. and Durrant, James R. (2015) A comparison of charge separation dynamics in organic blend films employing fullerene and perylene diimide electron acceptors. Journal of Physical Chemistry Letters, 6 1: 201-205. doi:10.1021/jz502385n


Author Shoaee, Safa
Deledalle, Florent
Tuladhar, Pabitra Shakya
Shivanna, Ravichandran
Rajaram, Sridhar
Narayan, K. S.
Durrant, James R.
Title A comparison of charge separation dynamics in organic blend films employing fullerene and perylene diimide electron acceptors
Journal name Journal of Physical Chemistry Letters   Check publisher's open access policy
ISSN 1948-7185
Publication date 2015-01-02
Year available 2014
Sub-type Article (original research)
DOI 10.1021/jz502385n
Open Access Status Not Open Access
Volume 6
Issue 1
Start page 201
End page 205
Total pages 5
Place of publication Washington, DC, United States
Publisher American Chemical Society
Collection year 2016
Language eng
Formatted abstract
We report a comparison of charge carrier dynamics and device performance for low band gap polymer PBDTTT-CT in blends with the fullerene acceptor PC71BM and a PDI derivative with similar electron affinities. Charge separation and recombination dynamics are found to be remarkably similar for these two acceptors, with both blends exhibiting efficient, ultrafast charge separation (time constants of 1.6 and 1.4 ps, respectively). The lower device performance for the PDI acceptor (1.75% compared to 3.5% for the equivalent PC71BM device) is shown to result from slower charge transport, increasing nongeminate recombination losses during charge collection.
Keyword Charge photogeneration
Nongeminate recombination
Morphology
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Centre for Organic Photonics and Electronics
Non HERDC
 
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