1. Organic–Inorganic Copper Halide Compound with a Near‐Unity Emission: Large‐Scale Synthesis and Diverse Light‐Emitting Applications.
- Author
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Chen, Kunlin, Chen, Bingkun, Xie, Lingling, Li, Xitao, Chen, Xiyao, Lv, Ning, Zheng, Kun, Liu, Zhe, Pi, Huihui, Lin, Zhengguo, and Rogach, Andrey L.
- Subjects
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COPPER compounds , *LIGHT emitting diodes , *X-ray detection , *METAL halides , *EXCITON theory , *MICROCRYSTALLINE polymers - Abstract
Low‐dimensional organic–inorganic metal halides (OIMHs) have emerged as promising light emitters due to their broadband emission originating from self‐trapped excitons (STE), especially for Cu‐based OIMHs. Herein, Cu(I)‐based OIMH with a structure of (TPP)2Cu4I6·2DMSO (TPP stays for tetraphenylphosphonium, and DMSO – for dimethyl sulfoxide) has been synthesized, both in form of single crystals and as a microcrystalline powder. This compound exhibits a broadband green emission with a peak at 515 nm and a full width at half‐maximum of 78 nm, and a near‐unity photoluminescence quantum yield of 99.5%. Experimental data supported by theoretical calculations indicate that the STE emission is responsible for the green emission with a long lifetime of 2.53 µs. Down‐conversion light‐emitting device with a high luminous efficiency of 50 lm W−1 based on this compound have been fabricated, and white light has also been achieved with a high color rendering index of 96.7. Moreover, green emissive (TPP)2Cu4I6·2DMSO is utilized in scintillators for X‐ray detection and imaging, and as a luminescent ink for encryption applications. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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