Boosting the Sensitivity of WSe2 Phototransistor via Janus Interfaces with 2D Perovskite and Ferroelectric Layers

被引:15
作者
Tong, Tong [1 ,2 ]
Gan, Yuquan [3 ]
Li, Weisheng [4 ,5 ]
Zhang, Wei [1 ,2 ]
Song, Haizeng [4 ,5 ]
Zhang, Hehe [1 ,2 ]
Liao, Kan [4 ,5 ]
Deng, Jie [6 ]
Li, Si [4 ,5 ]
Xing, Ziyue [7 ,8 ]
Yu, Yu [6 ]
Tu, Yudi [9 ]
Wang, Wenhui [10 ]
Chen, Jinlian [1 ,2 ]
Zhou, Jing [6 ]
Song, Xuefen [1 ,2 ]
Zhang, Linghai [1 ,2 ]
Wang, Xiaoyong [4 ,5 ]
Qin, Shuchao [3 ]
Shi, Yi [4 ,5 ]
Huang, Wei [7 ,8 ]
Wang, Lin [1 ,2 ]
机构
[1] Nanjing Tech Univ, Key Lab Flexible Elect, Sch Phys & Math Sci, Nanjing 211816, Peoples R China
[2] Nanjing Tech Univ, Inst Adv Mat, Sch Phys & Math Sci, Nanjing 211816, Peoples R China
[3] Liaocheng Univ, Sch Phys Sci & Informat Engn, Liaocheng 252059, Shandong, Peoples R China
[4] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210023, Peoples R China
[5] Nanjing Univ, Jiangsu Prov Key Lab Adv Photon & Elect Mat, Nanjing 210023, Peoples R China
[6] Chinese Acad Sci, Shanghai Inst Tech Phys, State Key Lab Infrared Phys, Shanghai 200083, Peoples R China
[7] Northwestern Polytech Univ, Frontiers Sci Ctr Flexible Elect, Xian Inst Flexible Elect IFE, Xian 710072, Peoples R China
[8] Northwestern Polytech Univ, Xian Inst Biomed Mat & Engn, Xian 710072, Peoples R China
[9] Shenzhen Univ, Inst Microscale Optoelect, Shenzhen 518060, Peoples R China
[10] Southeast Univ, Sch Phys, Nanjing 211189, Peoples R China
基金
中国国家自然科学基金; 中国博士后科学基金;
关键词
two-dimensional materials; phototransistor; heterostructures; ultrasensitive; weak light detection; PHOTODETECTOR;
D O I
10.1021/acsnano.2c09284
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Hybrid systems have recently attracted increasing attention, which combine the special attributes of each constitute and create interesting functionalities through multiple heterointerface interactions. Here, we design a two-dimensional (2D) hybrid phototransistor utilizing Janus-interface engineering, in which the WSe2 channel combines light-sensitive perovskite and spontaneously polarized ferroelectrics, achieving collective ultrasensitive detection performance. The top perovskite (BA2(MA)3Pb4I13) layer can absorb the light efficiently and provide generous photoexcited holes to WSe2. WSe2 exhibit p-type semiconducting states of different degrees due to the selective light-operated doping effect, which also enables the ultrahigh photocurrent of the device. The bottom ferroelectric (Hf0.5Zr0.5O2) layer dramatically decreases the dark current, which should be attributed to the ferroelectric polarization assisted charge trapping effect and improved gate control. As a whole, our phototransistors show excellent photoelectric performances across the ultraviolet to near-infrared range (360-1050 nm), including an ultrahigh ON/OFF current ratio > 109 and low noise-equivalent power of 1.3 fW/Hz1/2, all of which are highly competitive in 2D semiconductor-based optoelectronic devices. In particular, the devices show excellent weak light detection ability, where the distinguishable photoswitching signal is obtained even under a record-low light intensity down to 1.6 nW/cm2, while showing a high responsivity of 2.3 x 105 A/W and a specific detectivity of 4.1 x 1014 Jones. Our work demonstrates that Janus-interface design makes the upper and lower interfaces complement each other for the joint advancement into high-performance optoelectronic applications, providing a picture to realize the integrated engineering on carrier dynamics by light irradiation, electric field, interfacial trapping, and band alignment.
引用
收藏
页码:530 / 538
页数:9
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