Article
Chemistry, Multidisciplinary
Ju A. La, Seongyu Lee, A-Ra Hong, Ji Young Byun, JoonHyun Kang, Il Ki Han, Younghak Cho, Gumin Kang, Ho Seong Jang, Hyungduk Ko
Summary: The study introduces a super-boosted hybrid plasmonic upconversion architecture for efficient photodetection, utilizing a hierarchical plasmonic upconversion film and a polymeric microlens array film. By combining plasmonic metasurfaces with Au core-satellite nanoassembly films, an enhanced plasmonic effect is achieved to significantly lower the detectable power limit of the device, resulting in superior sensitivity and responsivity. Coupling a triple-cation perovskite-based photodetector with the hybrid plasmonic UC film demonstrates excellent values of responsivity and detectivity, enhancing the device performance by more than 10,000 times over a reference sample.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Chih-Ting Liu, Jarrett Vella, Naresh Eedugurala, Paramasivam Mahalingavelar, Tyler Bills, Bernardo Salcido-Santacruz, Matthew Y. Sfeir, Jason D. Azoulay
Summary: Photodetectors operating in the infrared range play a crucial role in modern society, but their complex manufacturing, high costs, and lack of compatibility with silicon electronics have limited their widespread usage. This study introduces a solution-processed narrow bandgap conjugated polymer as a photoconductive detector, enabling ultrasensitive photodetection in the infrared range at room temperature. The device demonstrates outstanding performance, low electronic noise, and high detectivity, overcoming limitations of other narrow-bandgap semiconductors.
Article
Materials Science, Multidisciplinary
Guoqiang Fang, Yanan Ji, Qi Xiao, Xinyao Dong, Jinlei Wu, Jixin Zou, Yizhuo Xu, Wen Xu, Bin Dong
Summary: Using lanthanide doped upconversion nanoparticles (UCNPs) as photoactive materials, near-infrared (NIR) photodetectors (PDs) can be achieved. UCNPs are combined with semiconductor materials to construct PDs, with UCNPs acting as the photoabsorber and semiconductors as efficient charge transporters. In this study, NaYF4:20%Yb, 2%Er UCNPs and MAPbI(3) were combined to achieve photodetection at 980 nm. The size of UCNPs and the roughness of UCNP layers were found to affect the performance of the PDs. Different sizes of UCNPs and Au@Ag nanorods were used to enhance the upconversion luminescence (UCL) intensity of UCNPs.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Chen-hao Xu, Sheng-Hui Luo, Yang Wang, Xiao-Feng Shi, Can Fu, Jiang Wang, Chun-Yan Wu, Lin-Bao Luo
Summary: This study presents a solution method for a dual-band photodetector (PD) based on silicon nanowires /PbS nanocrystalline film n-n heterojunction. The device exhibits bias-selectable spectral response in the near-infrared (NIR) and short-wave infrared (SWIR) bands by adjusting the polarity of the bias voltage. It achieves high responsivities and detectivity in the NIR region, comparable to or even better than some commercial PDs, due to improved optical absorption and charge separation and collection efficiency through the heterojunction geometry. The study demonstrates the potential of detecting two distinct IR regions with the same pixel for future optoelectronic systems.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Chemical
Daniela Szwarcman, Germano M. Penello, Rudy M. S. Kawabata, Mauricio P. Pires, Patricia L. Souza
Summary: This study introduces a novel method using quantum dot infrared photodetector to determine protein concentration in milk, allowing for on-site measurement of milk characteristics. The sensitivity of the method is reported to be in the picoampere range, with a change of 10 percentage points in milk concentration corresponding to 0.3 g/100 ml of protein.
JOURNAL OF FOOD ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Alexandra Schroter, Susanne Maerkl, Naomi Weitzel, Thomas Hirsch
Summary: This article investigates the advantages of lanthanide-doped upconversion nanoparticles (UCNPs) in biological applications and presents an enhancement strategy to increase their upconversion efficiency. By increasing the sensitizer content and blocking energy migration pathways, small and bright UCNPs can be designed.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Min-Woo Kim, Yihang Yuan, Sehee Jeong, Jenny Chong, Havard Molnas, Aida Alaei, Iverj Cleveland, Na Liu, Yichen Ma, Stefan Strauf, Eray S. Aydil, Ayaskanta Sahu, Dilhan M. Kalyon, Stephanie S. Lee
Summary: Stable infrared photodetectors based on electrospun tri-cation perovskite fibers infiltrated with hole-transporting small molecule Spiro-OMeTAD are demonstrated. These photodetectors exhibit ultra-high gains with external quantum efficiencies up to 3009% and remain stable after prolonged exposure to air. The improved performance of electrospun fibers is attributed to the enhanced interfacial surface area between the perovskite and Spiro-OMeTAD, which allows for multiple travels of photogenerated holes before recombination.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Bin Sun, Amin Morteza Najarian, Laxmi Kishore Sagar, Margherita Biondi, Min-Jae Choi, Xiyan Li, Larissa Levina, Se-Woong Baek, Chao Zheng, Seungjin Lee, Ahmad R. Kirmani, Randy Sabatini, Jehad Abed, Mengxia Liu, Maral Vafaie, Peicheng Li, Lee J. Richter, Oleksandr Voznyy, Mahshid Chekini, Zheng-Hong Lu, F. Pelayo Garcia de Arquer, Edward H. Sargent
Summary: Colloidal quantum dots (CQDs) have tunable bandgap and solution processing, making them promising materials for infrared (IR) light detection. However, the time response of CQD IR photodiodes is currently inferior to that of Si and InGaAs. The high permittivity of II-VI CQDs leads to slow charge extraction, while III-Vs offer low permittivity and potential for high-speed operation. By managing the surface using amphoteric ligand coordination, the performance of InAs CQD solids is improved, achieving fast response time and high external quantum efficiency.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Chunhua An, Fengmin Nie, Rongjie Zhang, Xinli Ma, Dahao Wu, Yang Sun, Xiaodong Hu, Dong Sun, Li Pan, Jing Liu
Summary: A flexible photodetector with strong self-healing capability and stable performance under large deformation is developed in this article. The photodetector shows stable photoresponse and even increases under small tensile strain, with a large-area 2D material self-healing photodetection array designed for pattern recognition.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Instruments & Instrumentation
Chuanyang Cai, Pengfei Hou, Pan Zhou, Bo Li
Summary: Defects play a crucial role in the electrical properties of two-dimensional materials. In this study, we introduced defects into alpha-In2Se3 nanosheets through ion irradiation and artificially created defects in the atomic layers. The defects were found to significantly affect the carrier mobility and forbidden band width of the nanosheets, leading to improved photodetection capability. Specifically, chain selenide vacancies exhibited the greatest impact, increasing Iph, R, EQE, and D* by 455%, 455%, 455%, and 110%, respectively.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2022)
Article
Nanoscience & Nanotechnology
Yanan Ji, Guoqiang Fang, Jingyu Shang, Xinyao Dong, Jinlei Wu, Xiang Lin, Wen Xu, Bin Dong
Summary: This research demonstrates a polarization-sensitive narrowband near-infrared photo-detector by integrating directional Au@Ag nanorods with UCNPs. The experimental and theoretical results show that the gold-silver nanorods have a sharp localized surface plasmon resonance peak and significantly enhance the polarization-dependent luminescence of the UCNPs. Furthermore, a polarized imaging system at 1550 nm was developed based on this technology.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Hanlun Xu, Yao Wang, Jinbo Shen, Ziyang Ren, Jiaqi Zhu, Yansong Chen, Mengjuan Liu, Yihui Zhai, Yunhao Lu, Yong Zhang, Shiyao Zhu, Sihan Zhao, Huizhen Wu
Summary: This paper reports an ultrafast and extremely low noise mid-infrared (MIR) photodetector achieved at both room and cryogenic temperatures by utilizing the high-mobility 2D electron gas (2DEG) at the polar CdTe/PbTe heterostructure interface. The detector exhibits a peak detectivity of approximately 4.2 x 10(11) Jones with a rapid response in the order of 10 ns, surpassing the state-of-the-art 2DEG MIR detectors made of 2D layered materials. The unique band alignment at the interface is responsible for the ultrafast response with extremely low noise of the 2DEG photodetector. The practical infrared imaging application is demonstrated using the 2DEG MIR detector, revealing fine features of a MIR radiation target. This work highlights the promising prospect of using the unique 2DEG interface in high-speed and highly sensitive MIR detection.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Haemin Song, Yadviga Tischenko, Daniel Wasserman, Kwang Seob Jeong
Summary: This opinion piece traces the development of quantum dot mid-infrared photodetectors, starting from epitaxially-grown self-assembled quantum dot detectors to a new generation of colloidal nano-crystal based devices. It discusses the advantages and challenges of these colloidal quantum dot materials, as well as their potential for commercial device applications.
OPTICAL MATERIALS EXPRESS
(2023)
Article
Nanoscience & Nanotechnology
Sivacarendran Balendhran, Zakir Hussain, Vivek R. Shrestha, Jasper Cadusch, Ming Ye, Nima Sefidmooye Azar, Hyungjin Kim, Rajesh Ramanathan, James Bullock, Ali Javey, Vipul Bansal, Kenneth B. Crozier
Summary: The study demonstrates a broadband room-temperature photo-detection method based on CuTCNQ, which is simple, affordable, and has potential applications.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Han Wang, Ruirui Liu, Songqing Zhang, Yijun Wang, Huijia Luo, Xiao Sun, Yongling Ren, Wen Lei
Summary: This study reports on the growth of monocrystalline Bi2S3 nanowires using chemical vapor deposition and their applications in near-infrared polarized photodetectors. The obtained Bi2S3 nanowires exhibited high quality and a growth model was developed to explain their morphology change. The photodetectors based on these nanowires showed remarkable device performance with high polarization sensitivity to near-infrared light signals.
