期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 126, 期 17, 页码 7615-7621出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.2c01864
关键词
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资金
- MOST [2018YFA0208704]
- NSFC [21725305, 22073099, U2001216, 21606191]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB17010100]
- Youth Innovation Promotion Association CAS [2019188]
- Dalian Youth Science and Technology Star Project Support Program [2019RQ0105]
- DICP [DICP I201913]
In this study, the excitation-power-dependent dual-band emission from self-trapped excitons (STEs) and Mn dopants in 1D Mn-doped DMEDAPbBr(4) single crystals was reported. By changing the excitation intensity, a broad and continuous color tuning range between blue and orange was achieved. The tunable emission color is enabled by the competitive transfers of excitons to the STE state and Mn2+ ions.
One-dimensional (1D) perovskites are ideal broadband-emitting phosphors for white-emitting diode applications. Doping Mn2+ in 1D perovskites provides a new idea to tune the materials' light-emitting properties. Here, we report an excitation-power-dependent dual-band emission from both self-trapped excitons (STEs) and Mn dopants in individual 1D Mn-doped DMEDAPbBr(4) single crystals. By changing the excitation intensity, we realize a broad and continuous color tuning range between blue and orange. The temperature-dependent photoluminescence (PL) and transient spectroscopy measurements demonstrate that the tunable emission color is enabled by the competitive transfers of excitons to the STE state and Mn2+ ions. The Mn-doped 1D perovskites exhibit a high photostability by showing a continuous switch between blue and orange emissions during an uninterrupted operation time of 7.5 h. The high stability and emission-color switchable properties make the Mn-doped 1D perovskites special optically tunable PL materials for potential light-emitting applications.
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