April 7 - 11, 2025
Seattle, Washington
Symposium Supporters
2025 MRS Spring Meeting & Exhibit
EL01.03.02

Aggregation-Shape Effects of ASE in Perovskite Nanoparticles

When and Where

Apr 8, 2025
11:00am - 11:30am
Summit, Level 4, Room 427

Presenter(s)

Co-Author(s)

Bin Hu1

South China University of Technology1

Abstract

Bin Hu1

South China University of Technology1
Hybrid metal-halide perovskite nanoparticles can aggregate into different shapes to prepare thin-film samples towards device applications. On the other hand, the excitons in perovskite nanoparticles are formed in J states carrying both orbital and spin momentum. We found that, when the MAPbBr3 nanoparticles aggregate into rod-like shape, an ASE can be easily observed with low threshold pumping energy. When the MAPbBr3 nanoparticles aggregate into diamond-like shape, it is very difficult to demonstrate an ASE. This presents aggregation-shape effects of ASE in perovskite nanoparticles. Furthermore, we found that the exciton-exciton interactions are dominated by in-phase orbital polarizations in the ASE observed in the MAPbBr3 nanoparticles aggregated with rod-like shape. This indicates that the exciton-exciton interaction within perovskite nanoparticles can be controlled by aggregation shape towards developing lasing actions. This presentation will discuss the aggregation shape effects of ASE through exciton-exciton interaction in perovskite nanoparticles.

Symposium Organizers

Pieter Geiregat, Ghent Univ
Namyoung Ahn, Yonsei University
Valerio Pinchetti, Los Alamos National Laboratory
Wanyi Nie, SUNY University at Buffalo

Symposium Support

Gold
Los Alamos National Laboratory

Silver
LIGHT CONVERSION

Bronze
IOP Publishing
PicoQuant
UbiQD, Inc.

Session Chairs

Namyoung Ahn
Jongchan Kim

In this Session