Perovskite photodetectors prepared by flash evaporation printing

Organometallic halide perovskites have expanded promising approaches for fabricating optoelectronic devices with low cost and high performance since their discovery. Here we propose a novel technique, flash evaporation printing, to prepare perovskite thin films with high quality in an efficient way, whose success is attributed to freestanding carbon nanotube films serving as the flash evaporator. It is convenient to print patterned perovskites using this method due to the compact deposition geometry. The patterned perovskite thin films were further manufactured to planar-type photodetectors, and the performance of the photoelectric devices was evaluated. The as-prepared photodetector shows a considerable peak responsivity and fast temporal response, proving flash evaporation printing an effective route for exploiting high-performance perovskite photodetectors, and this technique can find potential applications in more fields.