Renaud Jack Francis, Schlabach Ashlyn, Narayan Meenakshi, Davies Evan, Gillis Morgan, Gugino Jack, Nusair Nisreen, Krekeler Mark P S, Bhowmick Mithun
Department of Mathematical and Physical Sciences, Miami University, Middletown, OH 45042, USA.
Department of Engineering Technology, Miami University, Middletown, OH 45042, USA.
Polymers (Basel). 2025 Aug 27;17(17):2317. doi: 10.3390/polym17172317.
Polymer nanocomposites incorporating perovskite (PV) nanoparticles have recently emerged as highly promising materials for optoelectronic and photonic devices. In this work, steady-state and time-resolved photoluminescence (PL) were performed in PV-based polydimethylsiloxane (PDMS) nanocomposite films. The steady-state PL measurements revealed linearly increasing emission as excitation intensities ramped up, followed by a saturation. The optical limiting was scalable through the PV concentrations and is likely due to creation of maximum number of electron-hole (e-h) pairs in the system. The presence of a PDMS altered the multi-exponential PL decay significantly, both in terms of underlying mechanism and the associated timescales. The introduction of PDMS changed a 3-component exponential decay of PV into a 2-component mechanism and reduced the total timescale of decay from 16 ns to ~6 ns.
包含钙钛矿（PV）纳米颗粒的聚合物纳米复合材料最近已成为用于光电器件和光子器件的极具前景的材料。在这项工作中，对基于PV的聚二甲基硅氧烷（PDMS）纳米复合薄膜进行了稳态和时间分辨光致发光（PL）研究。稳态PL测量结果显示，随着激发强度的增加，发射呈线性增加，随后达到饱和。光学限幅可通过PV浓度进行调节，这可能是由于系统中产生了最大数量的电子 - 空穴（e - h）对。PDMS的存在显著改变了多指数PL衰减，无论是在潜在机制还是相关时间尺度方面。PDMS的引入将PV的三组分指数衰减转变为双组分机制，并将总衰减时间尺度从16 ns缩短至约6 ns。
