Pure White Light with Ultra-high QY
A novel organic-inorganic hybrid copper(I) halide that breaks Kasha's rule to achieve excitation-dependent multicolor luminescence, enabling pure white emission, highly sensitive temperature sensing, and X-ray imaging from a single material.
Zhi-Wei, Chen · Xiao-Hua, Yang · Rui-Han, Wei · Lin, Zhang · Yue, Chengyang · Lei, Xiaowu
Small 2026
By tuning excited-state structural deformability, multiple triplet excitons contribute to emission, enabling continuous color tuning from blue to green to orange with excitation wavelength between 80 and 300 K.
The material directly emits pure white light without blending multiple components, with ultra-high quantum yield, potentially simplifying white LED architectures.
Three emission bands show distinct temperature-dependent intensity and lifetime from 80 to 400 K, enabling ratiometric and lifetime thermometers with a maximum relative sensitivity of 13.14%·K⁻¹, surpassing most metal halide luminescent thermometers.
Efficient broadband emission delivers high light yield, a low detection limit, and high-resolution X-ray imaging, suitable for radiation detection and imaging.