Related Experiment Video
Updated: Oct 25, 2026

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
Published on: June 28, 2016
Photon Statistics from Yb3+-Doped CsPbCl3 Are Inconsistent with Quantum Cutting
Vincent R M Benning1, Faris Horani2, Daniel R Gamelin2
1Debye Institute for Nanomaterials Science, Utrecht University, Utrecht, 3584 CC, The Netherlands.
Abstract:
CsPb(Cl1-xBrx)3:Yb3+ has been widely reported as a broadband quantum-cutting material with a photoluminescence quantum yield exceeding 100%, making it a promising candidate for enhancing the blue-green spectral response of silicon photovoltaics. Many groups have reproduced absolute photoluminescence quantum yields over 100%, but others have struggled to obtain such high values. Here, we test the quantum-cutting capabilities of CsPbCl3:Yb3+ nanocrystals and bulk material using photon-correlation analysis. A quantum-cutting material is expected to exhibit photon bunching, but our experiments on CsPbCl3:Yb3+ show no such behavior. In fact, we observe the opposite─antibunching─under focused-excitation conditions. This observation can be explained with the previously established Auger-quenching pathway in CsPbCl3:Yb3+. Our results thus confirm high-power Auger quenching but question earlier descriptions of quantum cutting in CsPb(Cl1-xBrx)3:Yb3+.
Related Concept Videos
UV–Vis Spectroscopy: Molecular Electronic Transitions
π Electron Effects on Chemical Shift: Overview
Deactivation Processes: Jablonski Diagram
Hybridization of Atomic Orbitals I
Atomic Spectroscopy: Absorption, Emission, and Fluorescence

