Gain in CsPbBr3 quantum dots – it’s all about biexcitons

13.12.2024

We report the biexcitonic origin of optical gain in spherical CsPbBr₃ quantum dots (QDs), which also exhibit amplified spontaneous emission. This is clearly demonstrated by the gain threshold, its spectral position, and the gain time scale, as revealed by femtosecond transient absorption spectroscopy. Our findings provide a solid foundation for targeted optimization of the light amplification properties of perovskite QDs.
Read more in our recent publication in ACS Photonics: Biexcitonic Optical Gain in CsPbBr3 Quantum Dots by A. Barfüßer, J. Feldmann, and Q. A. Akkerman