Ultrasensitive photodetectors based on a high-quality LiInSe2 single crystal

2018 ◽  
Vol 6 (46) ◽  
pp. 12615-12622 ◽  
Author(s):  
Ning Jia ◽  
Shanpeng Wang ◽  
Pengfei Wang ◽  
Chunlong Li ◽  
TongTong Yu ◽  
...  
Keyword(s):  
Single Crystal ◽  
High Stability ◽  
Response Speed ◽  
Fast Response ◽  
Research Interest ◽  
Future Research ◽  
High Quality ◽  
Current Ratio

An ultrasensitive photodetector based on high-quality LiInSe2 (LISe) was systemically investigated. The device exhibited a high on/off current ratio, high detectivity, fast response speed, and high stability. This work may lay the foundation and ignite future research interest on LISe in photodetection.

Self-powered photosensing characteristics of amorphous carbon/silicon heterostructures

RSC Advances ◽  
2016 ◽  
Vol 6 (46) ◽  
pp. 40192-40198 ◽  
Author(s):  
L. Z. Hao ◽  
Y. J. Liu ◽  
W. Gao ◽  
Z. D. Han ◽  
Z. J. Xu ◽  
...  
Keyword(s):  
Amorphous Carbon ◽  
High Stability ◽  
Response Speed ◽  
Fast Response ◽  
Self Powered ◽  
Silicon Heterostructures ◽  
Zero Voltage

A self-powered photodetector based on a a-C/Si heterojunction is fabricated. Under zero voltage, the device shows excellent photosensing characteristics with a high stability, a high detectivity and responsitivity, as well as a fast response speed.

Epitaxial growth of CsPbBr3/PbS single-crystal film heterostructures for photodetection

2021 ◽  
Vol 42 (11) ◽  
pp. 112001
Author(s):  
Yifan Wang ◽  
Xuanze Li ◽  
Pei Liu ◽  
Jing Xia ◽  
Xiangmin Meng
Keyword(s):  
Single Crystal ◽  
Response Speed ◽  
Building Blocks ◽  
Deposition Process ◽  
Fast Response ◽  
Photogenerated Carrier ◽  
Single Crystal Film ◽  
Crystal Film ◽  
Single Crystal Films ◽  
Crystal Films

Abstract Epitaxial high-crystallization film semiconductor heterostructures has been proved to be an effective method to prepare single-crystal films for different functional devices in modern microelectronics, electro-optics, and optoelectronics. With superior semiconducting properties, halide perovskite materials are rising as building blocks for heterostructures. Here, the conformal vapor phase epitaxy of CsPbBr3 on PbS single-crystal films is realized to form the CsPbBr3/PbS heterostructures via a two-step vapor deposition process. The structural characterization reveals that PbS substrates and the epilayer CsPbBr3 have clear relationships: CsPbBr3(110) // PbS(100), CsPbBr3[ ] // PbS[001] and CsPbBr3[001] // PbS[010]. The absorption and photoluminescence (PL) characteristics of CsPbBr3/PbS heterostructures show the broadband light absorption and efficient photogenerated carrier transfer. Photodetectors based on the heterostructures show superior photoresponsivity of 15 A/W, high detectivity of 2.65 × 1011 Jones, fast response speed of 96 ms and obvious rectification behavior. Our study offers a convenient method for establishing the high-quality CsPbBr3/PbS single-crystal film heterostructures and providing an effective way for their application in optoelectronic devices.

scholarly journals Inch-sized high-quality perovskite single crystals by suppressing phase segregation for light-powered integrated circuits

2021 ◽  
Vol 7 (7) ◽  
pp. eabc8844
Author(s):  
Yucheng Liu ◽  
Yunxia Zhang ◽  
Xuejie Zhu ◽  
Zhou Yang ◽  
Weijun Ke ◽  
...  
Keyword(s):  
Integrated Circuits ◽  
Single Crystals ◽  
Integrated Circuit ◽  
High Performance ◽  
Imaging System ◽  
Phase Segregation ◽  
Response Speed ◽  
Fast Response ◽  
High Quality ◽  
Carrier Lifetimes

The triple-cation mixed-halide perovskite (FAxMAyCs1-x-y)Pb(IzBr1-z)3 (FAMACs) is the best composition for thin-film solar cells. Unfortunately, there is no effective method to prepare large single crystals (SCs) for more advanced applications. Here, we report an effective additive strategy to grow 2-inch-sized high-quality FAMACs SCs. It is found that the judiciously selected reductant [formic acid (FAH)] effectively minimizes iodide oxidation and cation deprotonation responsible for phase segregation. Consequently, the FAMACs SC shows more than fivefold enhancement in carrier lifetimes, high charge mobility, long carrier diffusion distance, as well as superior uniformity and long-term stability, making it possible for us to design high-performance self-powered integrated circuit photodetector. The device exhibits large responsivity, high photoconductive gain, excellent detectivity, and fast response speed; all values are among the highest reported to date for planar-type single-crystalline perovskite photodetectors. Furthermore, an integrated imaging system is fabricated on the basis of 12 × 12 pixelated matrixes of the single-crystal photodetectors.

scholarly journals Light-Driven Crystal–Polymer Hybrid Actuators

2021 ◽  
Vol 8 ◽  
Author(s):  
Shodai Hasebe ◽  
Daisuke Matsuura ◽  
Takaaki Mizukawa ◽  
Toru Asahi ◽  
Hideko Koshima
Keyword(s):  
Single Crystal ◽  
Mechanical Performance ◽  
Molecular Crystals ◽  
Response Speed ◽  
Fast Response ◽  
Hybrid Films ◽  
Soft Robots ◽  
Responsive Materials ◽  
Wide Range ◽  
External Stimuli

Recently, soft robots, which are made of soft and light organic materials, have attracted much attention because of improved safety for daily interactions with humans. Mechanically responsive materials that can move macroscopically by external stimuli, such as light and heat, have been studied extensively over the past two decades, and they are expected to be applicable to soft robots. Among them, mechanically responsive crystals are attractive in terms of a larger Young’s modulus and faster response speed compared with polymers and gels. However, it is impractical to use one piece of a single crystal as a crystal machine; it is difficult to control the size of crystals and obtain large crystals. Hybridization of crystals with polymers is one way to create actuators with more realistic movements. Herein, we report a hybrid crystal assembly in which plate-like salicylideneaniline crystals are aligned in polymer films by a “rubbing” technique, a new approach which is inexpensive, easy, and applicable to a wide range of crystals and polymers. The hybrid films bent reversibly upon alternate irradiation with ultraviolet and visible light. The hybrid films bent as fast as single crystals, even when larger than single-crystal size, showing great mechanical performance originating from the advantages of both molecular crystals (fast response time) and polymers (large size). This work enriches the development of light-driven hybrid actuators composed of molecular crystals and polymers.

scholarly journals Self-powered visible photodetector with fast-response speed and high stability based on assembled (In,Ga)N nanowires

OSA Continuum ◽  
2021 ◽  
Author(s):  
Min Jiang ◽  
Jianya Zhang ◽  
Zhiwei Xing ◽  
Dongmin Wu ◽  
Hua Qin ◽  
...  
Keyword(s):  
High Stability ◽  
Response Speed ◽  
Fast Response ◽  
Self Powered

Tin oxide/Silicon Heterojunction with Nano Litchi Shell Structure for Ultrafast, High-Detectivity, Self-Powered Broadband Photodetectors

2022 ◽  
Author(s):  
Cuicui Ling ◽  
Bingxin Feng ◽  
Xiaomeng Wang ◽  
lingtan Zhang ◽  
tuo zhang ◽  
...  
Keyword(s):  
Tin Oxide ◽  
Shell Structure ◽  
Response Speed ◽  
Fast Response ◽  
Research Interest ◽  
Detection Capability ◽  
Absorbing Materials ◽  
Self Powered ◽  
Broadband Detection

Self-powered photodetectors with excellent figure-of-merits, fast response speed, and broadband detection capability have drawn tremendous research interest. However, it is still challenging to develop excellent light-absorbing materials as photodetectors with...

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