The preparation of perovskite single crystals is essential for the fabrication of high-performance optoelectronic devices. Yet achieving precise spatial control over crystal arrays remains a significant challenge. In this study, we introduce a reconfigurable method for the patterned crystallization of lead halide perovskites using digital holographic optical tweezers. This approach allows for precise spatially controlled crystallization, enabling the formation of diverse geometric crystal patterns of the perovskite. Moreover, the crystallization patterns exhibit excellent reconfigurability with dynamic transformations such as rotation, compression, stretching, and shape conversion achieved by modulating the holographic phase in real time. This method enables a versatile and powerful platform for the scalable engineering of perovskite crystal arrays in next-generation optoelectronic devices.
Feng et al. (Mon,) studied this question.