An A₂B₂O₇-Type High-Entropy Oxide for Efficient Photoelectrochemical Photodetector with Excellent Long-Term Stability

Wang, Dan1; Xu, Yiguo2; Zhang, Han3,4; Zhang, Ye1

2023-10-01

10.1002/smtd.202300888

SMALL METHODS   Impact Factor & Quartile

2366-9608

Optoelectronics with excellent long-term stability is meaningful for practical applications. Herein, for the first time, an A(2)B(2)O(7) type high-entropy oxide of (La0.2Ce0.2Nd0.2Gd0.2Bi0.2)(2)Ti2O7 (ATO) is synthesized and applied for photoelectrochemical photodetection. The lattice distortion, highly dispersed metal composition, and exposed active sites of ATO are beneficial for the fast separation and transmission of photogenerated electron/hole pairs, endowing ATO-based devices with good photodetection performance. Both the density functional theory calculations and the nondegenerate transient absorption spectroscopy demonstrate the good optoelectronic properties of ATO. The systematic experimental studies reveal the tunable photodetection capability of ATO-based photodetector (PD) in the visible region. A photocurrent of 772.00 nA cm(-2) and a responsivity of 4.02 mu A W-1 can be achieved as the PD in 1.0 m KOH with the bias potential of 0.6 V. Importantly, the robust and reproducible ON/OFF signals of the PD can be verified and there is only approximate to 5.00% attenuation in photocurrent even after 6 months, revealing the great potential of high- entropy oxides for practical applications.

A(2)B(2)O(7)-type ceramics DFT calculations high-entropy long-term stability photodetection

SCI

English

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The research was financially supported by the National Natural Science Fund of China (Grant No. 61905157, 12004256). Fund of University of South China (Grant No. 201RGC009).["61905157","12004256"] ; National Natural Science Fund of China[201RGC009]

Chemistry ; Science & Technology - Other Topics ; Materials Science

Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:001082505000001

WILEY-V C H VERLAG GMBH

Web of Science

1.Univ South China, Sch Chem & Chem Engn, Lab Optoelect Technol Low Dimens Nanomat, Hengyang 421001, Peoples R China
2.Southern Univ Sci & Technol, Acad Adv Interdisciplinary Studies, Shenzhen 518055, Peoples R China
3.Shenzhen Univ, Inst Microscale Optoelect, Minist Educ, Collaborat Innovat Ctr Optoelect Sci, Shenzhen 518060, Peoples R China
4.Shenzhen Univ, Minist Educ, Technol Int Collaborat Lab 2D Mat Optoelect Sci &, Inst Microscale Optoelect, Shenzhen 518060, Peoples R China

Wang, Dan,Xu, Yiguo,Zhang, Han,et al. An A₂B₂O₇-Type High-Entropy Oxide for Efficient Photoelectrochemical Photodetector with Excellent Long-Term Stability[J]. SMALL METHODS,2023.

Wang, Dan,Xu, Yiguo,Zhang, Han,&Zhang, Ye.(2023).An A₂B₂O₇-Type High-Entropy Oxide for Efficient Photoelectrochemical Photodetector with Excellent Long-Term Stability.SMALL METHODS.

Wang, Dan,et al."An A₂B₂O₇-Type High-Entropy Oxide for Efficient Photoelectrochemical Photodetector with Excellent Long-Term Stability".SMALL METHODS (2023).