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We have fabricated a photodetector based on (CH 3 NH 3 ) 3 Sb 2 Br 9 (MA 3 Sb 2 Br 9 ) lead-free perovskite-like single crystal, which plays an important role in the optoelectronic characteristics of the photodetector as a perovskite-like photosensitive layer. Here, MA 3 Sb 2 Br 9 single crystals were synthesized by an inverse temperature crystallization process with a precursor solution at three different growth temperatures, 60 °C, 80 °C, and 100 °C. As a result, a MA 3 Sb 2 Br 9 single crystal with an optimum growth temperature of 60 °C presented a low trap density of 2.63 × 10 11 cm -3 , a high charge carrier mobility of 0.75 cm 2 V -1 s -1 , and excellent crystal structure and optical absorption properties. This MA 3 Sb 2 Br 9 perovskite-like photodetector displayed a low dark current of 8.09 × 10 -9 A, high responsivity of 0.113 A W -1 , and high detectivity of 4.32 × 10 11 Jones.

The Effects of Temperature on the Growth of a Lead-Free Perovskite-Like (CH3NH3)3Sb2Br9 Single Crystal for An MSM Photodetector Application