0585737 - FZÚ 2025 RIV DE eng J - Článek v odborném periodiku
Cheng, S. - Beitlerová, Alena - Kučerková, Romana - Nikl, Martin - Buryi, Maksym - Shao, C. - Ren, G. - Wu, Y.T.
Efficient white light-emitting diodes based on Cu(I) activated single-phase halide single crystals.
Physica Status Solidi. Roč. 18, č. 4 (2024), č. článku 2300463. ISSN 1862-6254. E-ISSN 1862-6270
Institucionální podpora: RVO:68378271
Klíčová slova: luminescent characteristics * Cs₂HfCl₆:Cu single crystals * the white light-emitting diodes
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 2.5, rok: 2023

Single-phase white light emitters have become a potential substitute for tricolor phosphor mixtures for the white light-emitting diodes (WLEDs) application to simplify device structure and eliminate self-absorption. Newly developed lowdimensional halides, noted for their highly efficient luminescent characteristics, have seen increasing interest in recent years. Herein, highly efficient white-light emission is demonstrated in single-phase zero-dimensional halide single crystal, namely monovalent Cu-doped Cs2HfCl6. Cs2HfCl6:Cu single crystals have three luminescent centers. Two emission peaks at 365 nm and 380 nm correspond to the intrinsic self-trapped excitons emission and a defect-related trapped exciton emission, respectively. Cu doping introduces an intense Cu-bound exciton emission peaking at 540 nm with a large Stokes shift of 250 nm and a high photoluminescence quantum yield of 68%.
Trvalý link: https://hdl.handle.net/11104/0353452