Xu Zhang

TL;DR: Two-inch-sized perovskite crystals, CH3 NH3 PbX3 (X=I, Br, Cl), with high crystalline quality are prepared by a solution-grown strategy, which is expected to transform its broad applications in photovoltaics, optoelectronics, lasers, photodetectors, LEDs, etc., just as crystalline silicon has done in revolutionizing the modern electronics and photov electricity industries.

TL;DR: A model of the passivation mechanism is proposed to understand how the molecules simultaneously passivate the Pb-I antisite defects and vacancies created by under-coordinated Pb atoms, and how the energy offset between the semiconducting molecules and the perovskite influences trap states and intergrain carrier transport.

TL;DR: By fine-tuning the crystal nucleation and growth process, a low-temperature-gradient crystallization method is developed to fabricate high-quality perovskite CH3 NH3 PbBr3 single crystals with high carrier mobility, long carrier lifetime, and ultralow trap state density that are better than commercial sensors made of silicon and InGaAs.

TL;DR: A method of induced peripheral crystallization is reported to prepare large area flexible single-crystalline membrane (SCM) of phenylethylamine lead iodide with area exceeding 2500 mm2 and thinness as little as 0.6 μm to grow large area ultrathin flexible crystalline membrane of layered perovskite and demonstrate high detectivity in the flexible photosensors.

TL;DR: Open circuit voltage decay and film resistance characterization revealed that the larger grain size contributed to longer carrier lifetime and smaller carrier transport resistance, both of which are beneficial for solar cell devices.