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Enhanced stability and tunable photoluminescence in Mn 2+ -doped one-dimensional hybrid lead halide perovskites for high-performance white light emitting diodes.

Jie ZhangKai-Qi SunZhong-Hui ZhangRi-Cheng WangZi-Han LinXiao-Wu LeiCheng-Yang YuePing JuYuan-Chun He
Published in: RSC advances (2023)
Organic-inorganic hybrid low-dimensional lead halides have garnered significant interest in the realm of solid-state optical materials due to their unique properties and potential applications. In this study, we report the synthesis, characterization and application of Mn 2+ -doped one-dimensional (1D) [AEP]PbCl 5 ·H 2 O hybrid lead halide perovskites with tunable photoluminescence properties. The Mn 2+ doping leads to a redshift of the dominant emission wavelength from 463 nm to 630 nm, with the optimal doping concentration resulting in an enhanced photoluminescence quantum yield (PLQY) from less than 1% to 8.96%. The structural and optical stability of these doped perovskites have been thoroughly investigated revealing excellent performance under humid and high-temperature conditions. Perovskite-PVP composite films exhibit high crystallization and bright orange-red emission under UV excitation. Furthermore, we demonstrate the successful fabrication of a white LED device using the Mn 2+ -doped perovskite in combination with commercial green and blue phosphors. The fabricated LED exhibits a high color rendering index (CRI) of 87.2 and stable electroluminescence performance under various operating currents and extended operation times. Our findings highlight the potential of Mn 2+ -doped 1D hybrid lead halide perovskites as efficient and stable phosphors for high-performance white light emitting diodes and other optoelectronic applications.
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