Article
Chemistry, Applied
M. L. Ligi, A. Abhilash, Sreekanth J. Varma, P. A. Unnikrishnan, S. Prathapan, S. Jayalekshmi
Summary: Two novel segmented block copolymers, NPPV1 and NPPV2, were synthesized and characterized for their substituent effects on properties, structure-property relationships, and suitability for polymer light emitting diodes. The study highlighted the importance of cost-effective synthesis methods in developing polymers for efficient LED design in high frequency blue emission.
Review
Chemistry, Multidisciplinary
Biao Zhao, Zhan'ao Tan
Summary: This article summarizes the advances in the application of CDs in LEDs, including their roles as active emission layer and interface transport layer materials, device structure, and preparation methods. The opportunities and challenges for achieving high-performance CD-based LED devices are also discussed.
Article
Chemistry, Multidisciplinary
Jiong Li, Chenghao Duan, Qiaoyun Wen, Ligang Yuan, Shibing Zou, Chang Chen, Weiguang Xie, Dongxu Lin, Christopher C. S. Chan, Kam Sing Wong, Keyou Yan
Summary: By using solution engineered perovskite nanocrystals, efficient integration of electroluminescence and photovoltaic performance in a single device has been achieved, which shows great potential for various applications.
Article
Materials Science, Multidisciplinary
Jianfeng Zhang, Lin Wang, Xiaoyu Zhang, Guohua Xie, Guohua Jia, Jianhua Zhang, Xuyong Yang
Summary: Metal halide perovskites have been widely used in optoelectronic devices, with green, red, and near-infrared PeLEDs achieving high external quantum efficiencies. However, blue PeLEDs face challenges such as low quantum yields, emission spectrum instability, and difficulties in charge injection. Research is ongoing to improve the efficiency of blue PeLEDs and address these challenges.
Article
Optics
Haiyan Zhao, Tongtong Xuan, Wenhao Bai, Haorui Dong, Guoyan Dong, Rong-Jun Xie
Summary: In this study, sky-blue DJ perovskites were synthesized using an organic diamine and high-quality perovskite films were prepared by incorporating a polymer as an additive. The resulting PeLEDs exhibited a high external quantum efficiency of 16.55%.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Yuan Xie, Wansheng Liu, Wanyuan Deng, Haimei Wu, Weiping Wang, Yichuan Si, Xiaowei Zhan, Chao Gao, Xian-Kai Chen, Hongbin Wu, Junbiao Peng, Yong Cao
Summary: This study reports on the potential applications of high-efficiency organic light-emitting diodes (OLEG) in the short-wavelength infrared (SWIR) region. By using specific types of molecules, researchers have successfully fabricated high radiance SWIR OLEGs, which have various applications in biosensors, biomedical imaging and spectroscopy, and surveillance.
Article
Materials Science, Multidisciplinary
Wenxu Yin, Xiaoyu Zhang, Xuyong Yang, Andrey L. Rogach, Weitao Zheng
Summary: This article summarizes the recent progress in the development of near-infrared quantum dot LEDs, focusing on how their device structure and emitter properties facilitate improvement of device performance. The challenges and opportunities associated with these LEDs are also discussed.
Review
Chemistry, Multidisciplinary
Chun Zhou, Wenyuan Meng, Lingmei Kong, Chengxi Zhang, Jianhua Zhang, Fangze Liu, Hongbo Li, Guohua Jia, Xuyong Yang
Summary: Metal halide perovskite light-emitting diodes (PeLEDs) are considered as the next-generation display technology due to their unique optoelectronic properties. However, the commercialization of solution-based PeLEDs still faces challenges. Vacuum deposition techniques offer precise control of film quality and are compatible with organic LED manufacturing process. Improving the efficiency and stability of PeLEDs remains a challenge.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Lingmei Kong, Changjiu Sun, Mengqing You, Yuanzhi Jiang, Guangzhao Wang, Lin Wang, Chengxi Zhang, Shi Chen, Sheng Wang, Shengyuan A. Yang, Shenghao Wang, Yingguo Yang, Xiaoyu Zhang, Mingjian Yuan, Xuyong Yang
Summary: Researchers have achieved a record-high external quantum efficiency of 12.1% in a large-area perovskite light-emitting diode (PeLED) by using a molecular interface modifier between the perovskite layer and the underlying hole transport layer. The modifier improves the surface wettability, enhances the scalability of solution-processed perovskite films, and enhances the luminous performance of the perovskite emitters.
Article
Chemistry, Multidisciplinary
Ting Yuan, Fanglong Yuan, Laizhi Sui, Yang Zhang, Yunchao Li, Xiaohong Li, Zhan'ao Tan, Louzhen Fan
Summary: A study demonstrates the synthesis of hexagon-shaped carbon quantum dots (H-CQDs) with near-unity photoluminescence quantum yield (PLQY) and high electron mobility. The H-CQD-based light-emitting diodes achieved a high external quantum efficiency and a record maximum brightness. This study shows the potential of CQDs-based electroluminescent devices for display and lighting applications.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Jaeyoul Kim, Donghyo Hahm, Wan Ki Bae, Hyunho Lee, Jeonghun Kwak
Summary: This study analyzes the transient electroluminescence signals of dichromatic QLEDs and provides insights into the operation mechanisms such as charge injection, exciton recombination, and electron mobility. Additionally, it quantitatively measures the effects of Förster resonant energy transfer and exciton quenching in QLED operation.
Article
Chemistry, Physical
Xiaomeng Zhang, Lei Shi, Junyang Bai, Feijiu Wang, Maowei Jiang
Summary: By engineering the heterointerface, defect passivation is performed on both the bottom and top surfaces of the perovskite film using semiconducting passivating molecules. This enhances the electron injection and boosts the electroluminescence of perovskite light-emitting diodes (PeLEDs), resulting in efficient PeLEDs with significantly improved external quantum efficiency.
Article
Chemistry, Multidisciplinary
Lingmei Kong, Changjiu Sun, Mengqing You, Yuanzhi Jiang, Guangzhao Wang, Lin Wang, Chengxi Zhang, Shi Chen, Sheng Wang, Shengyuan A. Yang, Shenghao Wang, Yingguo Yang, Xiaoyu Zhang, Mingjian Yuan, Xuyong Yang
Summary: The external quantum efficiency of large-area PeLEDs was significantly increased to 12.1% by introducing amphipathic molecular interface modifier betaine citrate (BC), which also improved the scalability of solution-processed perovskite films. Additionally, the coordination between C=O in the carboxyl groups and Pb dangling bonds enhanced the luminous performance of perovskite emitters.
Article
Chemistry, Multidisciplinary
Islam Mohammad Shafiqul, Raj Deep, Jie Lin, Toshiyuki Yoshida, Yasuhisa Fujita
Summary: In this study, nitrogen-doped zinc oxide nanoparticles were successfully synthesized using the gas evaporation method with DC arc plasma. The nitrogen concentration was found to have an impact on the Raman spectra and photoluminescence spectra of the nanoparticles.
Article
Chemistry, Multidisciplinary
Ji Jiang, Zema Chu, Zhigang Yin, Jingzhen Li, Yingguo Yang, Jingren Chen, Jinliang Wu, Jingbi You, Xingwang Zhang
Summary: Efficient red PeLEDs with high EQE and maximum brightness have been achieved by finely controlling the phase distribution of quasi-2D perovskite and passivation of defects in perovskite films.
ADVANCED MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Toshiyuki Oishi, Naoto Kawano, Satoshi Masuya, Makoto Kasu
IEEE ELECTRON DEVICE LETTERS
(2017)
Article
Materials Science, Multidisciplinary
A. Boussadi, A. Tallaire, M. Kasu, J. Barjon, J. Achard
DIAMOND AND RELATED MATERIALS
(2018)
Article
Materials Science, Multidisciplinary
Satoshi Masuya, Makoto Kasu
DIAMOND AND RELATED MATERIALS
(2018)
Article
Materials Science, Multidisciplinary
Niloy Chandra Saha, Makoto Kasu
DIAMOND AND RELATED MATERIALS
(2019)
Article
Materials Science, Multidisciplinary
Niloy Chandra Saha, Makoto Kasu
DIAMOND AND RELATED MATERIALS
(2019)
Article
Materials Science, Multidisciplinary
Jianbo Liang, Yan Zhou, Satoshi Masuya, Filip Gucmann, Manikant Singh, James Pomeroy, Seongwoo Kim, Martin Kuball, Makoto Kasu, Naoteru Shigekawa
DIAMOND AND RELATED MATERIALS
(2019)
Article
Physics, Applied
Ritsuko Sato, Yasuo Chiba, Masayuki Chikamatsu, Yuji Yoshida, Tetsuya Taima, Makoto Kasu, Atsushi Masuda
JAPANESE JOURNAL OF APPLIED PHYSICS
(2019)
Article
Physics, Applied
Ritsuko Sato, Yasuo Chiba, Masayuki Chikamatsu, Yuji Yoshida, Tetsuya Taima, Makoto Kasu, Atsushi Masuda
JAPANESE JOURNAL OF APPLIED PHYSICS
(2020)
Article
Physics, Applied
Ritsuko Sato, Tetsuyuki Ishii, Sungwoo Choi, Yasuo Chiba, Makoto Kasu, Atsushi Masuda
JAPANESE JOURNAL OF APPLIED PHYSICS
(2019)
Article
Physics, Applied
Niloy Chandra Saha, Kazutoshi Takahashi, Masaki Imamura, Makoto Kasu
JOURNAL OF APPLIED PHYSICS
(2020)
Article
Physics, Applied
Tamotsu Okamoto, Tomoya Igari, Takahiro Fukui, Ryuto Tozawa, Yasuhito Gotoh, Nobuhiro Sato, Yasuki Okuno, Tomohiro Kobayashi, Mitsuru Imaizumi, Masafumi Akiyoshi
Summary: In this study, a compact and radiation-tolerant radiation dosimeter without bias voltage application using CdTe solar cells was proposed for severe radiation environment near a nuclear reactor pressure vessel. The CdTe solar cells showed sufficient tolerance against gamma-ray exposure up to 3 MGy and linearly increased current density with increasing gamma-ray intensity. By stacking and parallel connecting CdTe solar cells, gamma-ray sensitivity was successfully improved, enabling high responsivity and low noise detection even under high flux neutron environments.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Jianbo Liang, Ayaka Kobayashi, Yasuo Shimizu, Yutaka Ohno, Seong-Woo Kim, Koji Koyama, Makoto Kasu, Yasuyoshi Nagai, Naoteru Shigekawa
Summary: The direct integration of GaN and diamond for high-power devices faces challenges due to mismatch in lattice and thermal-expansion coefficients. A successful fabrication of GaN/diamond heterointerface was achieved using a surface activated bonding method at room temperature. An intermediate layer composed of amorphous carbon and diamond is formed at the interface, with Ga and N atoms diffusing during the bonding process and transitioning to diamond after annealing.
ADVANCED MATERIALS
(2021)
Article
Physics, Applied
Sayleap Sdoeung, Kohei Sasaki, Katsumi Kawasaki, Jun Hirabayashi, Akito Kuramata, Makoto Kasu
Summary: The surface defects induced by probe attachment play a crucial role in causing reverse leakage current in β-Ga2O3 SBDs, which is essential for the commercialization of power devices.
APPLIED PHYSICS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Satoshi Masuya, Kenji Hanada, Takayoshi Oshima, Hitoshi Sumiya, Makoto Kasu
DIAMOND AND RELATED MATERIALS
(2017)
Article
Physics, Applied
Jianbo Liang, Satoshi Masuya, Makoto Kasu, Naoteru Shigekawa
APPLIED PHYSICS LETTERS
(2017)
