Abstract
The spectrum of the light emitted by a microcavity OLED is strongly time dependent on the nanosecond timescale after switch-on of the pump mechanism. This is one reason why convincing confirmation of laser operation in such device is difficult. The simple theory here presented is helpful in interpreting observed light-emission behavior. One important finding is that the occurrence in the optical spectrum of a narrow Lorentzian on top of a spontaneous-emission pedestal is no guarantee for observed laser operation. Another finding is that reabsorption by the singlet excitons leads to the highest gain when the cavity is detuned to the red side of the emission spectrum. This is confirmed by experimental observations on an optically pumped organic laser diode.
| Original language | English |
|---|---|
| Article number | 106852 |
| Number of pages | 7 |
| Journal | Organic Electronics |
| Volume | 121 |
| DOIs | |
| Publication status | Published - Oct 2023 |
Funding
This work was supported by the Agence Nationale de la Recherche through the 453 Investissement d'Avenir Programs under Grant ANR-11-IDEX-0005-02 , by the Labex SEAM: Science Engineering, 454 Advanced Materials, This study was also supported by the IdEx Université de Paris , ANR-18-IDEX-0001 and in part by the Research Project Zwaartekracht funded by the Netherland Organization for Scientific Research (NWO) . The authors would like to thank especially the Agence nationale de la recherche (ANR) for the funding of the DeμS CRP project ( ANR-21-CE24-0016-02 ).