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Self-Assembled Microdisk Lasers of Perylenediimides.
Zhenyi Yu1,2, Yishi Wu1, Qing Liao3
1Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, People's Republic of China.
Journal of the American Chemical Society
|November 19, 2015
Summary
Researchers developed the first organic solid-state laser (OSSL) using perylenediimide (PDI) derivatives. This breakthrough utilizes J-aggregates in a microdisk cavity, overcoming previous limitations for PDI-based OSSLs.
Area of Science:
- Organic electronics
- Photonics
- Materials science
Background:
- Organic solid-state lasers (OSSLs) are under intensive investigation.
- Perylenediimide (PDI) derivatives are common in organic electronics but have not yielded OSSLs due to aggregate and trap-state issues.
Purpose of the Study:
- To demonstrate the first PDI-based OSSL.
- To overcome limitations hindering PDI-based OSSLs.
Main Methods:
- Self-assembly of N,N'-bis(1-ethylpropyl)-2,5,8,11-tetrakis(p-methyl-phenyl)-perylenediimide (mp-PDI) into hexagonal microdisks (hMDs).
- Utilizing whispering-gallery mode (WGM) microcavities.
- Analysis of molecular packing, photoluminescence (PL) efficiency, exciton dynamics, and lasing characteristics.
Main Results:
- Achieved the first PDI-based OSSL using WGM hMDs of mp-PDI.
- mp-PDI forms J-aggregates with high solid-state PL efficiency (>15%).
- J-aggregates exhibit ultrafast radiative decay, suppressing bimolecular exciton annihilation (bmEA) and enabling multimode lasing.
Conclusions:
- The J-aggregate structure and WGM hMD microcavity facilitate OSSL operation.
- mp-PDI J-aggregates show promise for efficient OSSLs.
- These findings pave the way for electrically driven OSSLs.
