High magnetic field spectroscopy has been performed on lead chloride-based perovskite, a material that attracts significant interest for photovoltaic and photonic applications within the past decades. Optical properties being mainly driven by the exciton states, we have measured the fundamental parameters, such as the exciton binding energy, effective mass, and dielectric constant. Among the inorganic halide perovskites, CsPbCl3 owns the largest exciton binding energy and effective mass. This blue emitting compound has also been compared with lower band gap energy perovskites and other semiconducting phases, showing comparable band gap dependences for binding energy and Bohr radius.

中文翻译：

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CsPbCl₃的激子结合能和有效质量：磁光研究

高磁场光谱已在基于氯化铅的钙钛矿上进行，这种材料在过去几十年中引起了光伏和光子应用的极大兴趣。光学性质主要由激子态驱动，我们测量了基本参数，如激子结合能、有效质量和介电常数。在无机卤化物钙钛矿中，CsPbCl3 拥有最大的激子结合能和有效质量。这种蓝色发光化合物还与较低带隙能量的钙钛矿和其他半导体相进行了比较，显示出对结合能和玻尔半径的带隙依赖性相当。