From Self-Healing to Chiral Emission: The Versatile Platform of Halide Perovskite Quantum Emitters

Hao-Wu Lin^1*

¹Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, Taiwan

* Presenter:Hao-Wu Lin, email:hwlin@mx.nthu.edu.tw

The deployment of halide perovskite quantum dots (PQDs) in practical quantum technologies has been persistently hindered by critical issues of material instability and emission blinking. This talk will present a series of our recent works that successfully address these fundamental challenges. First, I will introduce an ultra-stable, self-healing CsPbI3 PQD platform, synthesized via a novel spray method, which functions as a high-brightness single-photon source for high-speed quantum random number generation. Second, I will discuss the achievement of highly efficient, non-blinking single-photon emission from MAPbI3-based QDs, a behavior we trace to the suppression of biexciton formation. Finally, I will present our work on engineering lattice symmetry in CsPbI3 PQDs to achieve intrinsic chiral quantum emission with an unprecedented dissymmetry factor (glum) exceeding 0.4. These combined advancements demonstrate that the primary obstacles for PQDs can be overcome, establishing them as a viable and robust platform for room-temperature quantum applications.

Keywords: Halide perovskite, Quantum dot, Quantum emitter, Single photon source, Chiral emission