Table 1.

Comparison of the performance of recently developed CuO photodetectors.

References	Structure	Light source/applied voltage	Responsivity [A/W]	Detectivity [Jones]	Response time (rise/fall)	Sensitivity (%)	Fabrication process
This work	Perfectly- aligned nanowire array	Visible light (400–700 nm)/3 V	16.0 A/W (Pin = 22.5 $\mathit{\mu }$ W/cm2)	7.78 $\times$ 1011 (Pin = 22.5 $\mathit{\mu }$ W/cm2)	0.31 s/1.21 s	172.2 (Pin = 2.92 mW/cm2)	Semiconductor batch-process
Appl. Surf. Sci. 2015, 346, 18–23	Film	Visible light (520 nm, Pin = 1 mW/cm2)/2 V	~ 11 $\times$ 10–3	N/A	N/A/ < 1 $\mu s$	~ 3	Physical vapor deposition
Superlattice. Microstruct. 2018, 113, 754–760	Film	Visible light (650 nm, Pin = 5 mW/cm2)/5 V	5.9 $\times$ 10–4	4.60 $\times$ 108	52.28 s/44.2 s	57.5	Physical vapor deposition
Sci. Rep. 2019, 9, 7334	Film	Visible light (400–700 nm)/3 V	15.3 A/W (Pin = 22.5 $\mu$ W/cm2)	1.08 $\times$ 1011 (Pin = 22.5 $\mu$ W/cm2)	0.682 s/1.77 s	4.06(Pin = 0.840 mW/cm2)	Semiconductor batch-process
IEEE Electron Device Lett. 2017, 39. 1. 47	Film	Visible light (633 nm, Pin = 500 mW/cm2)/− 20 V	0.17	1.38 $\times$ 1011	0.48 s/0.53 s	33.3	Sol–gel
IEEE Electron Device Lett. 2018, 40. 2. 255	Film	UV (245 nm, Pin = 2.11 mW/cm2)/− 20 V	7.77	3.08 $\times$ 1011	N/A	820	Solution process and thermal oxidation
Appl. Surf. Sci. 2018, 452, 155–164	Dispersed nanoparticle	UV-NIR (Pin = AM1.5G)/2 V	5.4	3.28 $\times$ 1010	16 ns	45	Synthesis
J. Phys. Chem. C 2010, 114, 2440–2447	Single nanowire	Visible light (540 nm, Pin = 1 mW/cm2)	~ 8	N/A	N/A/ ~ 36 s	87 (Pin = 45 mW/cm2)	Synthesis and transfer
Mater. Lett. 2014, 117, 217–220	Dispersed nanowires	Visible light (405 nm, Pin = 11.1 mW/cm2)	N/A	N/A	N/A/0.45 s	4	Thermal oxidation
Nanoscale Res. Lett. 2014, 9, 637	Single nanowire	Visible light (600 nm, Pin = 2 mW/cm2)/5 V	200	6.38 $\times$ 1011	N/A	1.35	Electrochemical
Appl. Phys. Lett. 2020, 116, 111102	Nano-semiparaboloids	UV-NIR (250–900 nm, Pin = 5 mW/cm2)/20 V	2.6 $\times$ 10–3	2 $\times$ 109	N/A	1.25	Hydrothermal method
Small Methods 2021, 2100202	Microhemisphere-Nanowire	NIR (810 nm, Pin = 7.4 mW/cm2)/1 V	2.5 $\times$ 10–7	4.3 $\times$ 108	18.3/144.9	1.3	Thermal oxidation growth
ACS applied materials and interfaces 2010, 2. 5. 1536	Mesoporous dandelion	Visible light	N/A	N/A	46 s/29.8 s	N/A	Synthesis (hydrothermal method)
Sens. Actuators, A 2016, 239. 209	Nano rod array	NIR (760–910 nm, Pin = 0.1 mW/cm2)/2 V	1.6	N/A	0.41 s/0.25 s	700	Cu synthesis (aqueous solution) and oxidation
IEEE Electron Device Letters, 2021, 42.6: 875–878	Nano-composite	UV-NIR (600 nm, Pin = 0.168 μW)/− 1 V	8.74	2.78 × 1013	12.16 μs/26.71 μs	3.75–55.16	Solution process and spin coating