Citation: Ablikim Obold, Ming Zhang, Feng Li. Evolution of emission manners of organic light-emitting diodes: From emission of singlet exciton to emission of doublet exciton[J]. Chinese Chemical Letters, ;2016, 27(8): 1345-1349. doi: 10.1016/j.cclet.2016.06.030 shu

Evolution of emission manners of organic light-emitting diodes: From emission of singlet exciton to emission of doublet exciton

State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China

Corresponding author: Feng Li, lifeng01@jlu.edu.cn
Received Date: 11 May 2016
Revised Date: 2 June 2016
Accepted Date: 6 June 2016
Available Online: 27 August 2016

Figures(5)

The emission manners of organic light-emitting diodes (OLEDs) have experienced almost three-decade evolution. In this review, we briefly summarized the emission manners of OLEDs including: (i) emission from singlet exciton; (ii) emission from triplet exciton; (iii) emission from singlet exciton converted from triplet exciton. Then we introduced a new type of OLEDs with the emission from doublet exciton, wherein organic neutral radicals are used as emitters. Due to the spin-allowed transition of doublet excitons, using neutral radicals as emitters is believed to be a new way to break the 25% upper limit of internal quantum efficiency of OLEDs. The progress of emissive stable neutral radicals is also shortly reviewed.
- Organic light-emitting diodes,
- Singlet exciton,
- Triplet exciton,
- Doublet exciton,
- Neutral radicals,
- Open-shell molecules
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