Dual-color photoluminescence modulation of zero-dimensional hybrid copper halide microcrystals
Rahul Ghosh Dastidar, Takuya Okamoto, Kiyonori Takahashi, Yuta Takano, Chakkooth Vijayakumar, Challapalli Subrahmanyam, Vasudevanpillai Biju
Abstract
] microcrystals (MCs) prepared on borosilicate glass. The structure and elemental composition of the MCs are characterized by single crystal X-ray diffraction analysis, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. Interestingly, MCs prepared on an ITO-coated glass plate show an intense green emission compared to the dual emission on a bare glass or plastic substrate. Furthermore, the intensity of the green emission from the MC is enormously increased by powdering using a conductive material, suggesting the deactivation of the red-emitting state by a charge transfer interaction with the conductor. These findings open a new strategy to suppress the self-trapping of excitons by longitudinal optical phonons and control the dual emitting states in HCHs.