Zhao Xianlong, Wang Na, Quan Mingzhen, Hou An, Liu Kunjie, Cui Yibo, Zhao Jing, Liu Quanlin
The Beijing Municipal Key Laboratory of New Energy Materials and Technologies, School of Materials Sciences and Engineering and Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China.
Inorg Chem. 2024 Jun 10;63(23):10705-10712. doi: 10.1021/acs.inorgchem.4c01220. Epub 2024 May 29.
Organic-inorganic hybrid halides have gained attention for their ease of processing and remarkable optoelectronic properties. However, the relationship between the structure and optical properties requires further exploration. In this study, the butyltrimethylammonium cation (CHN) was chosen, and seven compounds were synthesized: (CHN)SbX (X = Cl, Br), (CHN)BiX (X = Cl, Br, I), and (CHN)(CHN)MBr (M = Sb, Bi). Crystals with a single organic cation exhibit a zero-dimensional structure, while the introduction of dimethylamine ions increases the crystal dimensionality from zero-dimensional (CHN)SbBr to one-dimensional (CHN)(CHN)SbBr. Under 372 nm excitation, (CHN)SbCl showed broad orange-red single-band emission with a high photoluminescence quantum yield of 88.4% and an external quantum efficiency of up to 56.9%. A white light-emitting diode based on (CHN)SbCl achieved a high color rendering index of 96.3. Moreover, dual-band emission was observed in (CHN)SbCl under 308 nm excitation, which exhibits an absolute temperature sensitivity of 1.96 × 10 K (320 K), and a flexible film was prepared by incorporating polydimethylsiloxane. This shows the promise of hybrid metal halides as photoluminescent materials and their possibilities for temperature sensing.
有机-无机杂化卤化物因其易于加工和卓越的光电性能而受到关注。然而，其结构与光学性能之间的关系仍需进一步探索。在本研究中，选用了丁基三甲基铵阳离子（CHN），并合成了七种化合物：（CHN）SbX（X = Cl、Br）、（CHN）BiX（X = Cl、Br、I）以及（CHN）（CHN）MBr（M = Sb、Bi）。具有单一有机阳离子的晶体呈现零维结构，而引入二甲胺离子则使晶体维度从（CHN）SbBr的零维增加到（CHN）（CHN）SbBr的一维。在372 nm激发下，（CHN）SbCl呈现出宽的橙红色单带发射，光致发光量子产率高达88.4%，外量子效率高达56.9%。基于（CHN）SbCl的白光发光二极管实现了96.3的高显色指数。此外，在308 nm激发下，（CHN）SbCl中观察到双带发射，其绝对温度灵敏度为1.96×10 K（320 K），并且通过掺入聚二甲基硅氧烷制备了柔性薄膜。这表明杂化金属卤化物作为光致发光材料的前景及其在温度传感方面的可能性。
