Imperial College London
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Professor Matthew J. Fuchter

Faculty of Natural Sciences, Department of Chemistry

Professor of Chemistry
 
 
 
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Contact

 

+44 (0)20 7594 5815m.fuchter

 
 
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Location

 

110DMolecular Sciences Research HubWhite City Campus

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Summary

 

Publications

Citation

BibTex format

@article{Wan:2022:10.1039/d1tc05403a,
author = {Wan, L and Wade, J and Wang, X and Campbell, A and Fuchter, M},
doi = {10.1039/d1tc05403a},
journal = {Journal of Materials Chemistry C},
pages = {5168--5172},
title = {Engineering the sign of circularly polarized emission in achiral polymer – chiral small molecule blends as a function of blend ratio},
url = {http://dx.doi.org/10.1039/d1tc05403a},
volume = {10},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Circularly polarized organic light-emitting diodes (CP-OLEDs) that demonstrate both state-of-the-art efficiency and strongly circularly polarized (CP) electroluminescence have proved a considerable technical challenge. Furthermore, multiple factors – from film thickness to device structure – have been shown to influence the sign of the emitted CP light, independent of the handedness (absolute stereochemistry) of the chiral emitter. Here we report CP-OLEDs using a blend of poly(9,9-dioctylfluorene-alt-bithiophene) (F8T2) and a chiral small molecule additive (1-aza[6]helicene, aza[6]H). We demonstrate CP-OLEDs with an impressive electroluminescence dissymmetry (gEL) > 0.3 and a current efficiency of 0.53 cd A−1 and brightness of 3023 cd m−2. While at low aza[6]H loadings, F8T2 blends are consistent with previous observations of CP dissymetric inversion as a function of film thickness/excitation mode, a higher loading of aza[6]H (∼40 wt%) removes such dependencies while retaining excellent g-factors. The materials disclosed will allow for further mechanistic studies of chiral polymeric materials and provide new opportunities for chiroptical optimisation in films and devices.
AU  - Wan,L
AU  - Wade,J
AU  - Wang,X
AU  - Campbell,A
AU  - Fuchter,M
DO  - 10.1039/d1tc05403a
EP  - 5172
PY  - 2022///
SN  - 2050-7526
SP  - 5168
TI  - Engineering the sign of circularly polarized emission in achiral polymer – chiral small molecule blends as a function of blend ratio
T2  - Journal of Materials Chemistry C
UR  - http://dx.doi.org/10.1039/d1tc05403a
UR  - https://pubs.rsc.org/en/content/articlelanding/2022/TC/D1TC05403A
UR  - http://hdl.handle.net/10044/1/95312
VL  - 10
ER  -
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