Singlet fission in tetracene generates two triplet excitons per absorbed photon. If these triplet excitons can be effectively transferred into silicon (Si), then additional photocurrent can be generated from photons above the bandgap of Si. This could alleviate the thermalization loss and increase the efficiency of conventional Si solar cells. Here, we show that a change in the polymorphism of tetracene deposited on Si due to air exposure facilitates triplet transfer from tetracene into Si. Magnetic field-dependent photocurrent measurements confirm that triplet excitons contribute to the photocurrent. The decay of tetracene delayed photoluminescence was used to determine a transfer efficiency of ∼36% into Si. Our study suggests that control over the morphology of tetracene during the deposition will be of great importance to boost the triplet transfer yield further.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7569671PMC
http://dx.doi.org/10.1021/acs.jpclett.0c02163DOI Listing

Publication Analysis

Top Keywords

triplet transfer
12
triplet excitons
12
facilitates triplet
8
solar cells
8
triplet
6
tetracene
5
change tetracene
4
tetracene polymorphism
4
polymorphism facilitates
4
transfer
4

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!