Article
Entomology
Yoshihiro Takikawa, Teruo Nonomura, Takahiro Sonoda, Yoshinori Matsuda
Summary: Greenhouse tomatoes are threatened by serious pests like silverleaf whiteflies, vegetable leafminers, and western flower thrips. Researchers have developed an electric field-generating apparatus to attract and capture these pests entering the greenhouse. The apparatus, constructed with oppositely charged yellow-colored water in transparent insulator tubes, effectively attracts insects without excessive stickiness, providing a long-lasting pest control method.
Article
Optics
Katarzyna Pieniak, Witold Trzeciakowski, Grzegorz Muziol, Anna Kafar, Marcin Siekacz, Czeslaw Skierbiszewski, Tadeusz Suski
Summary: The study examined electroluminescence from In0.17Ga0.83N/GaN quantum wells of LEDs and LDs, finding a transition from ground-states recombination to excited states recombination with increasing QW width. The effect is accompanied by partial or complete screening of the built-in electric field with increasing driving current, which was studied using a high pressure method. Investigations were supported by simulations of the variation with driving current of electron and hole wavefunctions overlap affecting the recombination channel and built-in electric field.
Article
Chemistry, Multidisciplinary
Zishan Yan, Tong Chen, Lingpeng Yan, Xinghua Liu, Jingxia Zheng, Fu-de Ren, Yongzhen Yang, Bin Liu, Xuguang Liu, Bingshe Xu
Summary: White-light emitting carbon dots (WCDs) with high color rendering index (CRI) were prepared through a one-step solvothermal reaction. The WCDs emit white light by combining red, yellow, green, and blue lights. The high CRI value of 97 achieved in WLEDs using the WCDs as phosphors is among the highest reported. Additionally, multicolor LEDs can be fabricated using the four multicolor CDs as phosphors.
Article
Optics
Jacob J. Ewing, Cheyenne Lynsky, Matthew S. Wong, Feng Wu, Yi Chao Chow, Pavel Shapturenka, Michel Iza, Shuji Nakamura, Steven P. Denbaars, James S. Speck
Summary: This article studied the method of achieving highly efficient long-wavelength InGaN LEDs through V-defect engineering, which utilized naturally occurring V-defects for lateral injection and improved the external quantum efficiency.
Article
Nanoscience & Nanotechnology
Long Gao, Tuo Cheng, Lijie Gou, Yilin Zhang, Yuping Liu, Long Yuan, Xiaoyu Zhang, Yinghui Wang, Fanxu Meng, Jiaqi Zhang
Summary: By adding OctBr ligands to the surface of Cl/Br mixed perovskite NCs, surface light loss and ion migration pathways are effectively reduced, resulting in CsPbCl1.5Br1.5 NCs with exceptional blue emission. The study identified the nature of surface defects and proposed a surficial modification approach for developing high-performance and color-stable blue mixed-halide perovskite LEDs.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Xiangyu Fu, Yash Mehta, Yi-An Chen, Lei Lei, Liping Zhu, Nilesh Barange, Qi Dong, Shichen Yin, Juliana Mendes, Siliang He, Renuka Gogusetti, Chih-Hao Chang, Franky So
Summary: The study demonstrates highly directional and polarized light emission from LEDs by selectively diffracting the TE waveguide mode, showing potential for more efficient photonic applications.
ADVANCED MATERIALS
(2021)
Article
Multidisciplinary Sciences
Po-Wei Chen, Po-Wen Hsiao, Hsuan-Jen Chen, Bo-Sheng Lee, Kai-Ping Chang, Chao-Chun Yen, Ray-Hua Horng, Dong-Sing Wuu
Summary: The mechanism of carrier recombination in downsized mu-LED chips was investigated, showing that the smallest chip size exhibited the highest ideality factor due to carrier recombination in high-defect-density zones. The use of a passivation layer and a maskless technology improved the performance and efficiency of the mu-LED chips. The blue-shift phenomenon in the electroluminescence spectrum was attributed to carrier screening and band filling effects, with high EQE values observed in the high current density region for the 10 x 10 μm(2) mu-LED chip.
SCIENTIFIC REPORTS
(2021)
Review
Physics, Applied
Zhe Zhuang, Daisuke Iida, Kazuhiro Ohkawa
Summary: InGaN-based LEDs are efficient light sources in the blue-green range, but their efficiency decreases when extending to the red region, posing a challenge for integrating red, green, and blue LEDs for full-color micro-LED displays. This review summarizes the recent progress in InGaN-based red LEDs of various chip sizes, including epitaxial structures, device fabrication, and optical performance.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2022)
Article
Chemistry, Inorganic & Nuclear
Jianbang Zhou, Pengyun Chen, Junhao Li, Mingming Yang, Wei Jiang, Qiuhong Zhang, Haiyong Ni, Jiansheng Huo
Summary: In this study, a series of Cr3+-activated near-infrared (NIR) phosphors with broadband emission and tunable luminescence properties were designed and prepared. The luminescence characteristics of the materials could be controlled by adjusting the crystal field strength. One of the phosphors exhibited high luminous efficiency even at high temperature, and the thermal stability was attributed to the structural confinement and the electron-phonon coupling effect.
DALTON TRANSACTIONS
(2022)
Article
Agronomy
Zongfang Fan, Lei Qian, Yaping Chen, Rui Fan, Shuqi He, Yulin Gao, Furong Gui
Summary: The study found that elevated CO2 levels reduce enzyme activities in thrips, while spinetoram increases protective and detoxifying enzyme activities. Enzyme activities were generally higher in Frankliniella occidentalis compared to F. intonsa under both CO2 levels.
PEST MANAGEMENT SCIENCE
(2022)
Article
Physics, Applied
Abu Bashar Mohammad Hamidul Islam, Tae Kyoung Kim, Dong-Soo Shin, Jong-In Shim, Joon Seop Kwak
Summary: This study investigates the effect of current stress on InGaN/GaN multiple-quantum-well flip-chip blue micro light-emitting diodes (mu-LEDs) and reveals the mechanisms of defect aggregation and generation that cause changes in the optoelectronic performance of the devices. The aging test shows that the improvement in crystal quality due to defect aggregation initially enhances the light output power and external quantum efficiency (EQE), but the generation of sidewall point defects eventually leads to performance degradation. The findings highlight the importance of both defect aggregation and generation in understanding the degradation mechanisms of mu-LEDs.
APPLIED PHYSICS LETTERS
(2022)
Article
Multidisciplinary Sciences
Jin-Hoon Kim, Jin-Woo Park
Summary: An intrinsically stretchable organic light-emitting diode, made of highly stretchable constituent materials, is able to emit light under strains as large as 80%. It has a low turn-on voltage of 8 V and a maximum luminance of 4400 cd m(-2) from both the anode and cathode sides. The device can withstand repeated stretching cycles up to 200 times and shows improved light-emitting efficiency with small stretches up to 50%.
Article
Optics
Yu-Ming Huang, Chun-Yen Peng, Wen-Chien Miao, Hsin Chiang, Tzu-Yi Lee, Yun-Han Chang, Konthoujam James Singh, Z. Daisuke Iida, Ray-Hua Horng, Chi-Wai Chow, Chien-Chung Lin, Kazuhiro Ohkawa, Shih-Chen Chen, Hao-Chung Kuo
Summary: In this study, a high-efficiency InGaN red micro-LED is presented, which incorporates superlattice structure, atomic layer deposition passivation, and a distributed Bragg reflector. It exhibits a maximum external quantum efficiency of 5.02% and a low efficiency droop at an injection current density of 112 A/cm(2). The fast carrier dynamics in the InGaN is characterized, and a high modulation bandwidth of 271 MHz is achieved by a 6x 25-μm-sized micro-LED array with a data transmission rate of 350 Mbit/s at a high injection current density of 2000 A/cm(2). The technology holds great promise for full-color micro-displays and high-speed visible light communication applications based on monolithic InGaN micro-LED technologies.
PHOTONICS RESEARCH
(2022)
Article
Entomology
Iris L. Strzyzewski, Joe E. Funderburk, Justin M. Renkema, Hugh A. Smith
Summary: The research showed that Frankliniella occidentalis caused more damage to strawberries compared to Frankliniella bispinosa, particularly affecting the size and shape of the fruit.
JOURNAL OF ECONOMIC ENTOMOLOGY
(2021)
Article
Entomology
Maria Athanasiadou, Rainer Meyhoefer
Summary: The push-pull strategy is an effective technique for reducing the use of insecticides in integrated pest management. This study explored the use of LEDs emitting blue and ultraviolet light as repellents for whiteflies. The results showed that longer light exposure and higher light intensity increased insect repellency. Blue light and a combination of blue and UV light were the most effective in repelling whiteflies. These findings contribute to our understanding of whitefly behavior and can be useful for pest control strategies.
JOURNAL OF PEST SCIENCE
(2023)
Article
Biotechnology & Applied Microbiology
Ji-Yeon Yang, Jun-Hwan Park, Myung-Ji Lee, Ji-Hoon Lee, Hoi-Seon Lee
JOURNAL OF FOOD PROTECTION
(2017)
Article
Agronomy
Ye-Jin Jeon, Sang-Guei Lee, Young-Cheol Yang, Hoi-Seon Lee
PEST MANAGEMENT SCIENCE
(2017)
Article
Multidisciplinary Sciences
Jun-Hwan Park, Na-Hyun Lee, Young-Cheol Yang, Hoi-Seon Lee
SCIENTIFIC REPORTS
(2017)
Article
Multidisciplinary Sciences
Jun-Hwan Park, Ye-Jin Jeon, Chi-Hoon Lee, Namhyun Chung, Hoi-Seon Lee
SCIENTIFIC REPORTS
(2017)
Correction
Food Science & Technology
In Kyung Bae, Kyeongsoon Kim, Sung-Deuk Choi, Kyu-Sik Chang, Hoi-Seon Lee, Sung-Eun Lee
APPLIED BIOLOGICAL CHEMISTRY
(2017)
Article
Environmental Sciences
Kyeongnam Kim, Hwang-Ju Jeon, Sung-Deuk Choi, Daniel C. W. Tsang, Patryk Oleszczuk, Yong Sik Ok, Hoi-Seon Lee, Sung-Eun Lee
Article
Food Science & Technology
Eun-Yong Jeong, Myung-Ji Lee, Hoi-Seon Lee
FOOD SCIENCE AND BIOTECHNOLOGY
(2018)
Article
Biotechnology & Applied Microbiology
Jun-Hwan Park, Hoi-Seon Lee
JOURNAL OF FOOD PROTECTION
(2018)
Article
Agronomy
Myung-Ji Lee, Jun-Hwan Park, Hoi-Seon Lee
PEST MANAGEMENT SCIENCE
(2018)
Article
Multidisciplinary Sciences
Jun-Hwan Park, Hoi-Seon Lee
SCIENTIFIC REPORTS
(2018)
Article
Food Science & Technology
Young-Sun Moon, Hoi-Seon Lee, Sung-Eun Lee
APPLIED BIOLOGICAL CHEMISTRY
(2018)
Article
Entomology
J. E. Song, H. S. Lee
EXPERIMENTAL AND APPLIED ACAROLOGY
(2018)
Article
Food Science & Technology
Min-Seung Kang, Hoi-Seon Lee
APPLIED BIOLOGICAL CHEMISTRY
(2018)
Correction
Entomology
J. E. Song, H. S. Lee
EXPERIMENTAL AND APPLIED ACAROLOGY
(2019)
Correction
Food Science & Technology
Min-Seung Kang, Hoi-Seon Lee
APPLIED BIOLOGICAL CHEMISTRY
(2019)
