Molecular Origin of Balanced Bipolar Transport in Neat Layers of the Emitter CzDBA
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ArticleKAUST Grant Number
CRGDate
2020-07-06Online Publication Date
2020-07-06Print Publication Date
2021-02Embargo End Date
2021-07-06Permanent link to this record
http://hdl.handle.net/10754/667354
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Recently, an efficient single-layer organic light-emitting diode has been reported, consisting of a neat layer of the diboron-based thermally activated delayed fluorescence emitter 5,10-bis(4-(9H-carbazol-9-yl)-2,6-dimethylphenyl)-5,10-dihydroboranthrene, exhibiting remarkably balanced bipolar electron and hole transport. Here, the donor–acceptor–donor architecture of the molecule is linked to the transport characteristics of its neat amorphous films. It is found that energetic disorder is larger for holes than for electrons, explaining the experimentally observed difference in temperature activation of the mobility. Although a difference in energetic disorder would suggest unbalanced charge transport, it is demonstrated that it is partly counteracted by larger coupling elements for holes.Citation
Liu, W., Kotadiya, N. B., Blom, P. W. M., Wetzelaer, G. A. H., & Andrienko, D. (2020). Molecular Origin of Balanced Bipolar Transport in Neat Layers of the Emitter CzDBA. Advanced Materials Technologies, 2000120. doi:10.1002/admt.202000120Sponsors
This project received funding from the European Union Horizon 2020 research and innovation programme under Grant Agreement No. 646176 (EXTMOS). D.A. thanks the BMBF grant InterPhase (FKZ 13N13661) and the European Union Horizon 2020 research and innovation programme “Widening materials models” under Grant Agreement No. 646259 (MOSTOPHOS). This research was supported by the King Abdullah University of Science and Technology (KAUST), via the Competitive Research Grants (CRG) Program. D.A. acknowledges KAUST for hosting his sabbatical.Publisher
WileyJournal
Advanced Materials TechnologiesAdditional Links
https://onlinelibrary.wiley.com/doi/abs/10.1002/admt.202000120ae974a485f413a2113503eed53cd6c53
10.1002/admt.202000120
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Except where otherwise noted, this item's license is described as Archived with thanks to Advanced Materials Technologies