AI Article Synopsis
- - The study compares the charge carrier dynamics and device performance of the low band gap polymer PBDTTT-CT when blended with two different acceptors: PC71BM (a fullerene) and a PDI derivative with similar electron affinities.
- - Both blends show efficient and ultrafast charge separation, with time constants of 1.6 ps for PC71BM and 1.4 ps for the PDI derivative, indicating similar initial charge dynamics.
- - However, the PDI acceptor leads to lower device performance (1.75%) compared to PC71BM (3.5%) due to slower charge transport and increased recombination losses during charge collection.
Article 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.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/jz502385n | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!