(a) Schematic of the ITC apparatus and MAPbI₃ crystal growth at different time intervals.^[92] (b) Device structure of a single-crystal perovskite PD. (c) EQE spectra of a 0.3 mm thick MAPbBr₃ single crystal under different reverse biases. (d) EQE spectra of MAPbBr₃ single crystals with different thicknesses cleaved from the same large single crystal, measured under a −4 V bias.^[36] (e) Photograph of a 27 × 27 photoconductor array fabricated on a 34 × 38 mm²-sized MAPbBr₃ single crystal. (f) EQE and detectivity of the MAPbBr₃ single crystal photoconductor illuminated by monochromatic light with its wavelength changing from 325 nm to 650 nm at a 4 V bias.^[102]