Emerging Application of High-Entropy MXene in Efficient Photoelectrochemical-Type Photodetectors and Wideband Mode Lockers

被引：3

作者：

Gao, Xiaomeng ^{[1
,2
]}

Zhang, Shoukai ^{[1
,2
]}

Zhang, Jian ^{[3
]}

Wei, Songrui ^{[1
,2
]}

Chen, Yimiao ^{[1
,2
]}

Zhang, Yule ^{[1
,2
]}

Zheng, Wenchen ^{[1
,2
]}

Huang, Ziheng ^{[1
,2
]}

Du, Bowen ^{[1
,2
]}

Xie, Zhongjian ^{[4
]}

Wang, Bing ^{[1
,2
]}

Lin, Jahon ^{[2
,5
]}

Liu, Jun ^{[1
]}

Ge, Yanqi ^{[1
,2
]}

机构：

[1] Shenzhen Univ, Coll Phys & Optoelect Engn, Shenzhen 518060, Peoples R China

[2] Shenzhen Univ, Int Collaborat Lab 2D Mat Optoelect Sci & Technol, Shenzhen 518060, Peoples R China

[3] Suzhou Univ Sci & Technol, Inst Mat Sci & Devices, Sch Mat Sci & Engn, Suzhou 215009, Peoples R China

[4] Southern Univ Sci & Technol, Shenzhen Childrens Hosp, Clin Med Coll, Shenzhen 518038, Guangdong, Peoples R China

[5] Natl Taipei Univ Technol, Dept Electroopt Engn, Adv Nanophoton Technol Lab, Taipei 10608, Taiwan

来源：

LASER & PHOTONICS REVIEWS | 2024年 / 18卷 / 10期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

density functional theory calculations; high-entropy MXene; mode-locker; photodetector; OPTICAL NONLINEARITIES; TRANSITION; GRAPHENE;

D O I：

10.1002/lpor.202400082

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

High-entropy (HE) MXenes represent a novel class of 2D materials within the MXene family, which are drawing widespread attention because of their diverse compositions and robust physicochemical properties. However, the exploration of HE-MXenes in optoelectronic domains is relatively limited. This study unveils the rapid photoresponse and superior nonlinear optical (NLO) characteristics of HE-MXene TiVCrMoC3Tx nanosheets (NSs) through comparison with ordinary MXene Ti3C2Tx NSs. Transient absorption spectroscopy reveals that the few-layer TiVCrMoC3Tx NSs excel in photoelectrochemical-type photodetectors with swift response properties. Additionally, the advantage of HE structures is further validated by NLO measurement system, which show that few-layer TiVCrMoC3Tx NSs exhibit stronger saturable absorption than Ti3C2Tx NSs. First-principles calculations based on the special quasi-random structure method reveal that the transition behavior of HE-MXene is similar to that of a semiconductor with direct bandgap, and this is ascribed to the main reason of strong photoelectric response. Taking advantage of the NLO properties of the TiVCrMoC3Tx NSs, all-optical devices based on these NSs are applied to mode-locked fiber lasers at 1, 1.5, and 2 mu m wavebands, respectively. This investigation provides meaningful guidance for the future design and application of HE-MXenes in high-performance optoelectronic devices. This study reveals the excellent nonlinear optical properties of high-entropy MXene TiVCrMoC3Tx nanosheets in nonlinear optical measurement systems and the fast optical response as photoelectrochemical-based photodetectors by comparing with the ordinary MXene Ti3C2Tx nanosheets and demonstrates it by first-principles calculations. In addition, all-optical devices based on TiVCrMoC3Tx nanosheets are designed and applied to mode-locked fiber lasers at 1, 1.5, and 2 mu m bands, respectively. image

引用

页数：12