Organolead halide-based photovoltaics are one of the state-of-the-art solar cell systems with efficiencies increasing to 25% over the past decade, ascribed to their high light-absorption coefficient, broad wavelength coverage, tunable band structure, and excellent carrier mobility. Indeed, these optical characteristics are highly demanding in photocatalysis and photoluminescence (PL), which also involve the solar energy utilization and charge transport. However, the vast majority of organolead halides are ionically bonded structures and susceptible to degradation upon high-polarity protic molecules (e.g., water (vapor) and alcohol), which are often inevitable in many photochemical applications. Encapsulation is a commonly used stabilization approach by coating protective layers, avoiding the direct contact between organolead halides and polar molecules. However, this may partially hinder the light penetration to the inner hybrid halide materials, and introduce new interface problems that are important in photocatalysis and luminescent sensing. Therefore, developing intrinsically stable organometal halide hybrids is a major target for their applications in optoelectronic applications.

中文翻译：

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基于有机铅卤化物的配位聚合物：内在稳定性和光物理应用

基于有机铅卤化物的光伏电池是最先进的太阳能电池系统之一，在过去十年中效率提高到 25%，这归因于它们的高光吸收系数、宽波长覆盖范围、可调带结构和出色的载流子机动性。事实上，这些光学特性在光催化和光致发光（PL）方面要求很高，还涉及太阳能利用和电荷传输。然而，绝大多数有机铅卤化物是离子键合结构，容易被高极性质子分子（例如，水（蒸气）和酒精）降解，这在许多光化学应用中通常是不可避免的。封装是一种常用的稳定方法，通过涂覆保护层，避免有机铅卤化物与极性分子直接接触。然而，这可能会部分阻碍光穿透内部杂化卤化物材料，并引入在光催化和发光传感中很重要的新界面问题。因此，开发本质稳定的有机金属卤化物杂化物是其在光电应用中应用的主要目标。