Imperial College London
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DrJessicaWade

Faculty of Engineering, Department of Materials

Lecturer in Functional Materials
 
 
 
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Contact

 

jessica.wade

 
 
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Location

 

B336Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Wan:2021:10.1002/adom.202100066,
author = {Wan, L and Shi, X and Wade, J and Campbell, AJ and Fuchter, MJ},
doi = {10.1002/adom.202100066},
journal = {Advanced Optical Materials},
title = {Strongly Circularly Polarized Crystalline and β-Phase Emission from Poly(9,9-dioctylfluorene)-Based Deep-Blue Light-Emitting Diodes},
url = {http://dx.doi.org/10.1002/adom.202100066},
volume = {9},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - A key challenge in the realization of circularly polarized polymer light-emitting diodes (CP-PLEDs) is the generation of highly circularly polarized deep-blue electroluminescence (EL). Here, by blending the achiral luminescent polymer poly(9,9-dioctylfluorene) (PFO) with a helically chiral molecule 1-aza[6]helicene the authors present CP-PLEDs with state-of-the-art device performance for deep-blue CP emission: for an inverted device with a semicrystalline microstructure a current efficiency (CE) of 1.13 cd A−1, a power efficiency (PE) of 0.81 lm W−1, and an EL dissymmetry (gEL) of −0.42 are achieved; for the planarized and extended “β-phase” chain conformation a CE of 1.23 cd A−1, a PE of 0.63 lm W−1, and a gEL of −0.44 are achieved. While these two phases achieve both high CE, as well as gEL, the latter affords the first demonstration of chiral β-phase emission from solid-state PFO devices. Such strongly circularly polarized light is generated from a supramolecular assembly of interacting planar polymer backbones. The authors rationalize that the strong chiroptical effects observed within such chiral β-phase PFO domains originate from coupled interchain aggregates. The findings not only demonstrate efficient deep-blue CP-PLEDs, but also provide insight into the mechanisms that underpin the strong CP emission from excitonically coupled polymer chains.
AU  - Wan,L
AU  - Shi,X
AU  - Wade,J
AU  - Campbell,AJ
AU  - Fuchter,MJ
DO  - 10.1002/adom.202100066
PY  - 2021///
SN  - 2195-1071
TI  - Strongly Circularly Polarized Crystalline and β-Phase Emission from Poly(9,9-dioctylfluorene)-Based Deep-Blue Light-Emitting Diodes
T2  - Advanced Optical Materials
UR  - http://dx.doi.org/10.1002/adom.202100066
UR  - https://www.webofscience.com/wos/woscc/full-record/WOS:000663296200001
UR  - https://onlinelibrary.wiley.com/doi/10.1002/adom.202100066
VL  - 9
ER  -
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