TY - JOUR
T1 - Solid cyclooctatetraene-based triplet quencher demonstrating excellent suppression of singlet–triplet annihilation in optical and electrical excitation
AU - Mai, Van T.N.
AU - Ahmad, Viqar
AU - Mamada, Masashi
AU - Fukunaga, Toshiya
AU - Shukla, Atul
AU - Sobus, Jan
AU - Krishnan, Gowri
AU - Moore, Evan G.
AU - Andersson, Gunther G.
AU - Adachi, Chihaya
AU - Namdas, Ebinazar B.
AU - Lo, Shih Chun
N1 - Funding Information:
We thank the Australian Research Council (ARC DP160100700 and DP200103036), Department of Industry, Innovation and Science (AISRF53765), JST ERATO Grant Number JPMJER1305, JSPS KAKENHI Grant Number JP19H02790, and JSPS Core-to-Core programme for financial support. V.T.N.M. was supported by a UQ International Postgraduate Research Scholarship; V.A. was funded by an Australian Postgraduate Award and A.S. was funded by a UQ’s Research and Training Programme. This work was performed in part at the Queensland node of the Australian National Fabrication Facility Queensland Node (ANFF-Q)—a company established under the National Collaborative Research Infrastructure Strategy to provide nano-and micro fabrication facilities for Australia’s researchers.
Publisher Copyright:
© 2020, The Author(s).
PY - 2020/12/1
Y1 - 2020/12/1
N2 - Triplet excitons have been identified as the major obstacle to the realisation of organic laser diodes, as accumulation of triplet excitons leads to significant losses under continuous wave (CW) operation and/or electrical excitation. Here, we report the design and synthesis of a solid-state organic triplet quencher, as well as in-depth studies of its dispersion into a solution processable bis-stilbene-based laser dye. By blending the laser dye with 20 wt% of the quencher, negligible effects on the ASE thresholds, but a complete suppression of singlet–triplet annihilation (STA) and a 20-fold increase in excited-state photostability of the laser dye under CW excitation, were achieved. We used small-area OLEDs (0.2 mm2) to demonstrate efficient STA suppression by the quencher in the nanosecond range, supported by simulations to provide insights into the observed STA quenching under electrical excitation. The results demonstrate excellent triplet quenching ability under both optical and electrical excitations in the nanosecond range, coupled with excellent solution processability.
AB - Triplet excitons have been identified as the major obstacle to the realisation of organic laser diodes, as accumulation of triplet excitons leads to significant losses under continuous wave (CW) operation and/or electrical excitation. Here, we report the design and synthesis of a solid-state organic triplet quencher, as well as in-depth studies of its dispersion into a solution processable bis-stilbene-based laser dye. By blending the laser dye with 20 wt% of the quencher, negligible effects on the ASE thresholds, but a complete suppression of singlet–triplet annihilation (STA) and a 20-fold increase in excited-state photostability of the laser dye under CW excitation, were achieved. We used small-area OLEDs (0.2 mm2) to demonstrate efficient STA suppression by the quencher in the nanosecond range, supported by simulations to provide insights into the observed STA quenching under electrical excitation. The results demonstrate excellent triplet quenching ability under both optical and electrical excitations in the nanosecond range, coupled with excellent solution processability.
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U2 - 10.1038/s41467-020-19443-z
DO - 10.1038/s41467-020-19443-z
M3 - Article
C2 - 33159048
AN - SCOPUS:85095697439
VL - 11
JO - Nature Communications
JF - Nature Communications
SN - 2041-1723
IS - 1
M1 - 5623
ER -