Organic-inorganic hybrid metal halide perovskites, an important class of crystalline materials with excellent low-temperature solution processability and band structure tunability, have been known for decades. They have received great attention in recent years for applications in various types of optoelectronic devices, including photovoltaic cells, light emitting diodes and optically pumped lasers.

In photovoltaics, the absorption of photons induces the creation of electron/holes, while in photocatalysis, the equivalent is the production of reducing/oxidizing charges that can drive the desired chemistry. For photocatalysis, such reducing/oxidizing equivalents (excited electrons/holes) should live long enough and be transported efficiently to a catalytic site where chemistry occurs (i.e., at the photocatalyst surface). Therefore, photophysical properties of halide perovskites demonstrated for photovoltaic applications, also should be of interest in photocatalytic organic synthesis.

Not only unstable in moisture, oxygen, heat or radiation conditions, the lead halide perovskites are also sensitive under light.Doomed to interplay with light, the investigation of interaction of halide perovskites and light is a key issue for understanding theirphotophysicsand for characterization and practical applications because the optical characterization techniques such as photoluminescence and absorption measurements as well as working of perovskite based devices such as solar cell, LEDs, lasers, photodetectors involve the interaction of halide perovskites with light.(https://systems.enpress-publisher.com/index.php/CAN/article/view/813)

References:

[1] Yuan, Z., Zhou, C., Tian, Y. et al. One-dimensional organic lead halide perovskites with efficient bluish white-light emission. Nat Commun 8, 14051 (2017).

[2] Zhu, X., Lin, Y., San Martin, J. et al. Lead halide perovskites for photocatalytic organic synthesis. Nat Commun 10, 2843 (2019).

[3] Zhou, Y., You, L., Wang, S. et al. Giant photostriction in organic–inorganic lead halide perovskites. Nat Commun 7, 11193 (2016).