B−N/B−O Contained Heterocycles as Fusion Locker in Multi-Resonance Frameworks towards Highly-efficient and Stable Ultra-Narrowband Emission
Dr. Guoyun Meng
Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084 P. R. China
These authors contributed equally to this work.
Contribution: Writing - original draft (equal)
Search for more papers by this authorJianping Zhou
Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084 P. R. China
These authors contributed equally to this work.
Contribution: Methodology (supporting), Software (supporting)
Search for more papers by this authorDr. Tianyu Huang
Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084 P. R. China
Contribution: Methodology (supporting)
Search for more papers by this authorHengyi Dai
Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084 P. R. China
Contribution: Software (supporting)
Search for more papers by this authorDr. Xiao Li
Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084 P. R. China
Contribution: Methodology (supporting)
Search for more papers by this authorXiaoqin Jia
Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084 P. R. China
Contribution: Methodology (supporting)
Search for more papers by this authorDr. Lu Wang
Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084 P. R. China
Contribution: Software (supporting)
Search for more papers by this authorCorresponding Author
Dr. Dongdong Zhang
Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084 P. R. China
Contribution: Writing - original draft (equal), Writing - review & editing (lead)
Search for more papers by this authorCorresponding Author
Prof. Lian Duan
Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084 P. R. China
Center for Flexible Electronics Technology, Tsinghua University, Beijing, 100084 P. R. China
Contribution: Writing - original draft (supporting), Writing - review & editing (lead)
Search for more papers by this authorDr. Guoyun Meng
Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084 P. R. China
These authors contributed equally to this work.
Contribution: Writing - original draft (equal)
Search for more papers by this authorJianping Zhou
Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084 P. R. China
These authors contributed equally to this work.
Contribution: Methodology (supporting), Software (supporting)
Search for more papers by this authorDr. Tianyu Huang
Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084 P. R. China
Contribution: Methodology (supporting)
Search for more papers by this authorHengyi Dai
Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084 P. R. China
Contribution: Software (supporting)
Search for more papers by this authorDr. Xiao Li
Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084 P. R. China
Contribution: Methodology (supporting)
Search for more papers by this authorXiaoqin Jia
Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084 P. R. China
Contribution: Methodology (supporting)
Search for more papers by this authorDr. Lu Wang
Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084 P. R. China
Contribution: Software (supporting)
Search for more papers by this authorCorresponding Author
Dr. Dongdong Zhang
Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084 P. R. China
Contribution: Writing - original draft (equal), Writing - review & editing (lead)
Search for more papers by this authorCorresponding Author
Prof. Lian Duan
Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084 P. R. China
Center for Flexible Electronics Technology, Tsinghua University, Beijing, 100084 P. R. China
Contribution: Writing - original draft (supporting), Writing - review & editing (lead)
Search for more papers by this authorGraphical Abstract
A strategy is reported to realize ultra-narrowband emission by incorporating B−N/B−O heterocycles as fusion lockers into conventional multi-resonant frameworks. Three emitters exhibited bright sky-blue emission with remarkably small full width at half-maximum (FWHMs) of only 17–18 nm in solution. A high-performance OLED device was achieved with a small FWHM of merely 19 nm and a high EQE of up to 31.9 % with alleviated efficiency attenuation.
Abstract
Fusing condensed aromatics into multi-resonance (MR) frameworks has been an exquisite strategy to modulate the optoelectronic properties, which, however, always sacrifices the small full width at half maxima (FWHM). Herein, we strategically embed B−N/B−O contained heterocycles as fusion locker into classical MR prototypes, which could enlarge the π-extension and alleviate the steric repulsion for an enhanced planar skeleton to suppress the high-frequency stretching/ scissoring vibrations for ultra-narrowband emissions. Sky-blue emitters with extremely small FWHMs of 17–18 nm are thereafter obtained for the targeted emitters, decreased by (1.4–1.9)-fold compared with the prototypes. Benefiting from their high photoluminescence quantum yields of >90 % and fast radiative decay rates of >108 s−1, one of those emitters shows a high maximum external quantum efficiency of 31.9 % in sensitized devices, which remains 25.8 % at a practical luminance of 1,000 cd m−2 with a small FWHM of merely 19 nm. Notably a long operation half-lifetime of 1,278 h is also recorded for the same device, representing one of the longest lifetimes among sky-blue devices based on MR emitters.
Conflict of interest
The authors declare no conflict of interest.
Open Research
Data Availability Statement
The data that support the findings of this study are available from the corresponding author upon reasonable request.
Supporting Information
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