Review
Materials Science, Multidisciplinary
Liyang Yu, Guiseppe Portale, Natalie Stingelin
Summary: Organic semiconducting small molecules have versatile and tunable optoelectronic properties, but their polymorphic structures can lead to a large spread of device performances, emphasizing the importance of establishing knowledge and characterization libraries. Strategies and methodologies for controlling and assessing polymorph formation in small molecule semiconductors are discussed, with a focus on exploiting post-deposition treatments and pathways towards patterned structures to fully utilize their potential.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Materials Science, Multidisciplinary
Karl J. Thorley, Hoang Le, Yang Song, John E. Anthony
Summary: In this study, a series of anthradithiophenes with different substituents were investigated to understand trends in the photostability of acenes. The study examined light absorption, concentration dependence, and reactivity with singlet oxygen. The results can guide future molecular design for more robust or more photoreactive materials.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Materials Science, Ceramics
Yu-Rim Jeon, Dohee Lee, Han Bin Cho, Boncheol Ku, Won Bin Im, Changhwan Choi
Summary: With the increasing demands on unstructured data processing, a system emulating the human nervous system has garnered great attention as an alternative to the von-Neumann architecture. The use of organic-inorganic hybrid halide perovskites (OIHPs) as photoresponsive synapse devices has shown promise due to their broad optical absorption and low power consumption. However, most OIHPs contain toxic lead cations, limiting their widespread application. This study investigated the light-stimulated photo-synaptic characteristics of Mn2+-based OIHPs, which could substitute non-desirable Pb-based perovskite.
CERAMICS INTERNATIONAL
(2023)
Review
Chemistry, Multidisciplinary
Chunlan Wang, Yongle Song, Hao Huang
Summary: This article discusses the main strategies for improving the performance of MoS2 FETs and summarizes the applications of 2D MoS2 FETs in various fields. It also discusses the state-of-the-art of these systems and their future prospects.
Article
Materials Science, Multidisciplinary
Mengjian Xu, Tengfei Xu, Anqi Yu, Hailu Wang, Hao Wang, Muhammad Zubair, Man Luo, Chongxin Shan, Xuguang Guo, Fang Wang, Weida Hu, Yiming Zhu
Summary: This paper investigates the effects of electrical and photo stimulation on the LTD and LTP processes of photonic synaptic devices based on MoS2/h-BN FETs, finding that illumination and positive gate voltage can accelerate the LTD process, improving information processing speed. The study also explores the application of the photo-induced doping effect in synaptic devices.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Oscar Pereira-Rial, Paula Lopez, Juan M. Carrillo, Victor M. Brea, Diego Cabello
Summary: This brief presents a design of an ultra-low power low-dropout (LDO) regulator, which employs an adaptive biasing scheme based on a super source follower (SSF) structure to improve the transient response and counteract the effect of low bias current.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2022)
Article
Engineering, Electrical & Electronic
Yi Yang, Mohammad Javad Mirshojaeian Hosseini, Walter Kruger, Robert A. Nawrocki
Summary: This work proposes a novel modeling approach for analog organic circuits using simple circuit topology and parameters of organic field effect transistors. The approach can predict the behavior of analog organic neuromorphic circuits and other general analog organic circuits. The effectiveness of the approach is validated through the design of modular circuit primitives and comparison with other organic circuit models.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
(2023)
Article
Engineering, Electrical & Electronic
Hossein Eslahi, Tara J. Hamilton, Sourabh Khandelwal
Summary: In this paper, we present a mixed-signal integrate and fire neuron designed using a 22-nm FDSOI technology. The novel design utilizes the back-gate terminal of FDSOI technology for a tunable design, allowing for the first time a neuron with tunable spiking frequency using the back-gate voltage. The circuit operates at ultra-low energy per spike in the sub-threshold region and has the smallest reported layout area of only 30 μm(2).
IEEE TRANSACTIONS ON NANOTECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Jinhwan Lee, Kunsik An, Phillip Won, Yoonseok Ka, Hyejin Hwang, Hyunjin Moon, Yongwon Kwon, Sukjoon Hong, Changsoon Kim, Changhee Lee, Seung Hwan Ko
Article
Nanoscience & Nanotechnology
Kunsik An, Sukjoon Hong, Seungyong Han, Hyungman Lee, Junyeob Yeo, Seung Hwan Ko
ACS APPLIED MATERIALS & INTERFACES
(2014)
Article
Nanoscience & Nanotechnology
Sukjoon Hong, Junyeob Yeo, Wanit Manorotkul, Gunho Kim, Jinhyeong Kwon, Kunsik An, Seung Hwan Ko
JOURNAL OF NANOMATERIALS
(2013)
Article
Chemistry, Physical
Kunsik An, Seunghyun Rhee, Hyunho Lee, Kyung-Tae Kang, Changhee Lee, Jeonghun Kwak
JOURNAL OF PHYSICAL CHEMISTRY C
(2020)
Article
Chemistry, Analytical
Kunsik An, Ho-Nyun Lee, Kwan Hyun Cho, Seung-Woo Lee, David J. Hwang, Kyung-Tae Kang
Article
Chemistry, Physical
Young Joon Han, Do Yeob Kim, Kunsik An, Kyung-Tae Kang, Byeong-Kwon Ju, Kwan Hyun Cho
Review
Crystallography
Seunghyun Rhee, Kunsik An, Kyung-Tae Kang
Summary: Organic-inorganic hybrid perovskite materials with distinctive optoelectronic properties have been widely used in various optoelectronic devices, such as solar cells, photodetectors, LEDs, and lasers. Different characteristics of perovskite materials are suitable for their own applications, suggesting the importance of understanding and solving commercialization challenges.
Article
Materials Science, Multidisciplinary
Kunsik An, Ho-Nyun Lee, Kwan-Hyun Cho, Young Joon Han, Kyung-Tae Kang
Summary: A thin film encapsulation layer was fabricated using two sequential chemical vapor deposition processes to improve the stability and performance of organic light emitting diodes. The two-step encapsulation process, with LACVD as a buffer layer followed by LAPECVD as the main encapsulation layer, effectively alleviated the risk of plasma damaging the devices.
ORGANIC ELECTRONICS
(2021)
Article
Energy & Fuels
Kunsik An, Jaehoon Kim, Beomhee Yoon, Hyunho Lee
Summary: Halide perovskite solar cells have advantages such as tunability, long carrier diffusion length, low-cost fabrication, and comparable efficiency to silicon cells. The inverted structure, while suitable for portable applications, faces challenges in achieving high efficiency and stability. Introducing a unique transporting layer system with Liq buffer layer at the interface between PC70BM and Ag electrode significantly improved the efficiency and stability of PSCs.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Kunsik An, Chaewon Kim, Kwan Hyun Cho, Seunghwan Bae, Bo Kyung Cha, Kyung-Tae Kang
Summary: By controlling the thickness of the C-60 layer to achieve a microcavity effect, the absorption spectrum of the organic photodetector was matched to the emission spectrum of Gd2O2S, resulting in the successful fabrication of an X-ray detector system demonstrated in a medical X-ray radiography system.
ORGANIC ELECTRONICS
(2022)
Article
Nanoscience & Nanotechnology
Eunsik Choi, Kunsik An, Kyung-Tae Kang
Summary: This study proposes a deep-learning-based method to identify the droplet jetting status in inkjet printing process. By using a convolutional neural network based on the MobileNetV2 model and optimized hyperparameters, the method can classify images captured with a CCD camera and evaluate jetting conditions with high accuracy.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Faizan Ghani, Kunsik An, Dongjin Lee
Summary: This study investigates the potential application of iron vanadate as an anode material in lithium-ion batteries. The effects of calcination temperature and binder materials on the electrochemical performance of iron vanadate are explored. By optimizing the calcination temperature and binder materials, higher discharge/charge capacities can be achieved for iron vanadate.
Article
Anatomy & Morphology
Joel Ndikumana, Kunsik An
Summary: We performed local surface potential mapping of pentacene film using scanning kelvin probe microscopy and found that grain boundaries behave as hole traps.
MICROSCOPY RESEARCH AND TECHNIQUE
(2023)
Article
Chemistry, Physical
Sang Il Lee, Dongjin Lee, Kunsik An
Summary: This study proposed a type-variable electronic paper design and investigated the process mechanism of the electrophoretic particle loading method. The results showed that using a multi-electrode structure allowed for the expression of multiple colors and control of transmittance. This study provides an attractive method for creating a new form of electronic paper.
