1. Pseudo‐2D Layered Organic‐Inorganic Manganese Bromide with a Near‐Unity Photoluminescence Quantum Yield for White Light‐Emitting Diode and X‐Ray Scintillator.
- Author
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Zhang, Wei, Sui, Ping, Zheng, Wei, Li, Lingyun, Wang, Shuaihua, Huang, Ping, Zhang, Wen, Zhang, Qi, Yu, Yan, and Chen, Xueyuan
- Subjects
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PHOTOLUMINESCENCE , *X-rays , *MANGANESE , *OPTICAL properties , *X-ray imaging , *SCINTILLATORS , *LIGHT emitting diodes - Abstract
Eco‐friendly lead‐free organic–inorganic manganese halides (OIMHs) have attracted considerable attention in various optoelectronic applications because of their superior optical properties and flexible solution processibility. Herein, we report a novel pseudo‐2D layered OIMH (MTP)2MnBr4 (MTP: methyltriphenylphosphonium), which exhibits intense green emission under UV/blue or X‐ray excitation, with a near‐unity photoluminescence quantum yield, high resistance to thermal quenching (I150 °C=84.1 %) and good photochemical stability. These features enable (MTP)2MnBr4 as an efficient green phosphor for blue‐converted white light‐emitting diodes, demonstrating a commercial‐level luminous efficiency of 101 lm W−1 and a wide color gamut of 116 % NTSC. Moreover, these (MTP)2MnBr4 crystals showcase outstanding X‐ray scintillation properties, delivering a light yield of 67000 photon MeV−1, a detection limit of 82.4 nGy s−1, and a competitive spatial resolution of 6.2 lp mm−1 for X‐ray imaging. This work presents a new avenue for the exploration of eco‐friendly luminescent OIMHs towards multifunctional light‐emitting applications. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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