Singh Vishal, Dhar Joydeep
Department of Chemistry, Birla Institute of Technology, Mesra, Ranchi, 835215, Jharkhand, India.
Chempluschem. 2025 Jul 23:e2500241. doi: 10.1002/cplu.202500241.
Organic-inorganic lead halide perovskite is under intense focus on developing different optoelectronic devices because of its exceptional optical and electrical properties and ease of processing. However, the Pb toxicity and the luminescence instability of these classes of semiconductors require continuous development of newer luminescent variants. Herein, Mn is used as a dopant in luminescent morpholinium lead bromide perovskite, (CHNO)PbBr, to substitute Pb with Mn with varied doping percentage to develop two different analogs of Mn-doped (CHNO)PbBr with varied optical properties. The incorporation of the dopant ion is investigated using various characterization techniques like inductively coupled plasma-optical emission spectroscopy, single-crystal and powder X-ray diffraction, infrared, and electron paramagnetic resonance spectroscopies. The photophysical properties are characterized by absorption and emission spectroscopies. With the increase in Mn-dopant amount, the emission maxima showed a blueshift with respect to the pristine sample and exhibited an enhanced (about 40%) photoluminescence quantum yield. Finally, the possibility of utilizing these semiconductors for practical applications is conducted by studying the structural and photophysical properties after embedding them into an optically transparent polymer, polymethyl methacrylate.
有机-无机卤化铅钙钛矿因其优异的光学和电学性能以及易于加工而在开发不同的光电器件方面受到广泛关注。然而，这些类别的半导体的铅毒性和发光不稳定性需要不断开发更新的发光变体。在此，锰被用作发光吗啉铅溴钙钛矿（(CHNO)PbBr）中的掺杂剂，以不同的掺杂百分比用锰替代铅，从而开发出两种具有不同光学性质的锰掺杂(CHNO)PbBr的不同类似物。使用各种表征技术，如电感耦合等离子体发射光谱、单晶和粉末X射线衍射、红外和电子顺磁共振光谱，来研究掺杂离子的掺入情况。通过吸收和发射光谱来表征光物理性质。随着锰掺杂量的增加，发射最大值相对于原始样品呈现蓝移，并且光致发光量子产率提高（约40%）。最后，通过将这些半导体嵌入光学透明聚合物聚甲基丙烯酸甲酯后研究其结构和光物理性质，探讨了将它们用于实际应用的可能性。
