CuCr1－xMgxO2/ZnO Nanorods UV Photodetector Prepared by Sol-Gel Method

Fig. 2. Absorption spectra of substrate, CuCrO₂, and CuCr_1－_xMg_xO₂, where the inset shows an enlarged spectra in the wavelength range of 300 nm to 900 nm

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Fig. 3. Hall test diagram

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Fig. 4. SEM images of CuCrO₂ and CuCr_1－_xMg_xO₂films. (a)(b) Surface SEM images of CuCrO₂ and CuCr_1－_xMg_xO₂ films; (c)(d) cross-section SEM images of CuCrO₂ and CuCr_1－_xMg_xO₂ films

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Fig. 5. XRD spectra of CuCrO₂/ZnO and CuCr_1－_xMg_xO₂/ZnO

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Fig. 6. Detection performance of CuCrO₂/ZnO. (a) Typical I–V curves of CuCrO₂/ZnO heterojunction ultraviolet detector under 365 nm illumination and dark conditions; (b) I–T curves during light on-off switching under 365 nm illumination and－10 V conditions; (c)(d) enlarged I–T curves in the range of 21-25 s and 17-21 s corresponding to light-off to light-on and light-on to light-off transition

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Fig. 7. Detection performance of CuCr_1－_xMg_xO₂/ZnO. (a) Typical I-V curves of CuCr_1－_xMg_xO₂/ZnO heterojunction ultraviolet detector under 365 nm illumination and dark conditions; (b) I-T curves during light on-off switching under 365 nm illumination and -10 V conditions; (c)(d) enlarged I-T curves in the range of 39-42 s and 8-12 s corresponding to light-off to light-on and light-on to light-off transition

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Table 1. Mass of main materials used for preparing CuCrO₂and CuCr_1－_xMg_xO₂films
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Table 1. Mass of main materials used for preparing CuCrO₂and CuCr_1－_xMg_xO₂films
No. Cu（C₂H₃O₂）₂·H₂O/g Cr（NO₃）₃·9H₂O/g Mg（NO₃）₂·6H₂O/g
1
（preparing CuCrO₂）
1.9965 4.002 0
2
（preparing CuCr_1－_xMg_xO₂）
1.9965 3.5213 0.3077

Table 2. Hall test results of CuCrO₂and_{CuCr_1－_xMg_xO₂ films}

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Table 2. Hall test results of CuCrO₂and_{CuCr_1－_xMg_xO₂ films}

Film

Hall coefficient /（m²·C^-1）

Sheet

resistivity /（Ω·sq^-1）

Carrier concentration /cm^-3

Hall mobility /

（cm²·V^-1·s^-1）

CuCrO₂

+0.0201

29.9

3.1×10¹⁶

6.75

CuCr_1－_xMg_xO₂

+4.11×10^-4

1.3×10^-3

9.87×10²¹

0.11

Table 3. Performance parameters of CuCr_1－_xMg_xO₂/ZnO ultraviolet photodetector under 365 nm and comparison between our photodetector and other ultraviolet photodetectors

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Table 3. Performance parameters of CuCr_1－_xMg_xO₂/ZnO ultraviolet photodetector under 365 nm and comparison between our photodetector and other ultraviolet photodetectors

Photodetector	Photo-to-dark current ratio	Responsivity value / （A·W^-1）	τ_r /s	τ_d /s	Ref.
ZnO NW array/CuSCN	100	7.5×10^-3	5×10^-7	6.7×10^-6	［29］
ZnO films	17.03	4.4×10^-4	4.17	11.01	［30］
ZnO nanowalls	38.96	6.11×10^-1	1.36	2.23	［31］
ZnO nanorods		1.98×10^-1	0.99	2.036	［20］
Ag microporous array structure electrode /MgZnO films			6-7	2-3	［32］
Zn-doped CuGaO₂/ZnO	4.5	0.12	0.8	0.4	［33］
CuCrO₂/ZnO	2.3	3.2	2.7	1.8	This work
CuCr_1－_xMg_xO₂/ZnO	6	5.5	1.4	1.6	This work

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Hanfei Hu, Yingtian Xu, Li Li, Chongyang Xu, Yuanyuan Jing, Yang Liu, He Zhang, Liang Jin. CuCr_1－_xMg_xO₂/ZnO Nanorods UV Photodetector Prepared by Sol-Gel Method[J]. Acta Optica Sinica, 2022, 42(14): 1423001

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Paper Information

Category: Optical Devices

Received: Dec. 28, 2021

Accepted: Feb. 9, 2022

Published Online: Jul. 15, 2022

The Author Email: Xu Yingtian (xyt@cust.edu.cn)

DOI:10.3788/AOS202242.1423001

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Mass of main materials used for preparing CuCrO2 and CuCr1－xMgxO2 films

Table 1. Mass of main materials used for preparing CuCrO2 and CuCr1－xMgxO2 films

Table 2. Hall test results of CuCrO2 andCuCr1－xMgxO2 films

Table 2. Hall test results of CuCrO2 andCuCr1－xMgxO2 films

Table 3. Performance parameters of CuCr1－xMgxO2/ZnO ultraviolet photodetector under 365 nm and comparison between our photodetector and other ultraviolet photodetectors

Table 3. Performance parameters of CuCr1－xMgxO2/ZnO ultraviolet photodetector under 365 nm and comparison between our photodetector and other ultraviolet photodetectors

Table 1. Mass of main materials used for preparing CuCrO₂and CuCr_1－_xMg_xO₂films

Table 1. Mass of main materials used for preparing CuCrO₂and CuCr_1－_xMg_xO₂films

Table 2. Hall test results of CuCrO₂and_{CuCr_1－_xMg_xO₂ films}

Table 2. Hall test results of CuCrO₂and_{CuCr_1－_xMg_xO₂ films}

Table 3. Performance parameters of CuCr_1－_xMg_xO₂/ZnO ultraviolet photodetector under 365 nm and comparison between our photodetector and other ultraviolet photodetectors

Table 3. Performance parameters of CuCr_1－_xMg_xO₂/ZnO ultraviolet photodetector under 365 nm and comparison between our photodetector and other ultraviolet photodetectors