Article
Chemistry, Physical
Nikita Gagrani, Kaushal Vora, Lan Fu, Chennupati Jagadish, Hark Hoe Tan
Summary: Flexible and substrate-free nanowire (NW) devices are desirable for integrating III-V or III-N semiconductor devices on optoelectronic circuits or biochips. This study demonstrates core-shell p-InP/n-ZnO heterojunction NW array LEDs and investigates the differences between on-substrate and flexible devices.
NANOSCALE HORIZONS
(2022)
Article
Chemistry, Multidisciplinary
Kunsik An, Chaewon Kim, Sunkuk Kim, Taesoo Lee, Dongyeol Shin, Jaemin Lim, Donghyo Hahm, Wan Ki Bae, Jun Young Kim, Jeonghun Kwak, Jaehoon Kim, Kyung-Tae Kang
Summary: This paper presents a novel light extraction structure called RaDiNa, which enhances the light extraction capability of top-emitting quantum dot light-emitting diodes (TE-QLEDs). By detaching a polydimethylsiloxane (PDMS) film from a ZnO nanorod (ZnO NR) layer and laying it on top of the TE-QLED, the RaDiNa-attached TE-QLED achieves significantly improved external quantum efficiency (EQE) compared to the reference device. This study provides essential information for the commercialization of TE-QLEDs.
Article
Chemistry, Multidisciplinary
Xiuqi Shi, Wenfei Li, Xinhui Lan, Qianqian Guo, Guangpeng Zhu, Wei Du, Tao Wang
Summary: By using Ag nanowire top electrode, polarized LEDs based on 2D monolayer semiconductors (WSe2, MoSe2, and WS2) have been successfully achieved at room temperature with a degree of polarization (DoP) ranging from 50% to 63%. The highly anisotropic electroluminescence (EL) emission originates from the 2D/Ag interface via the electron/hole injection and recombination process, and the EL emission is further enhanced by the polarization-dependent plasmonic resonance of the Ag nanowire. These findings provide new insights for designing polarized 2D LED devices at room temperature and may promote the development of miniaturized 2D optoelectronic devices.
Article
Chemistry, Multidisciplinary
Fan Cao, Qianqian Wu, Wunan Li, Sheng Wang, Lingmei Kong, Jianhua Zhang, Xiaoyu Zhang, Hongbo Li, Weihong Hua, Andrey L. Rogach, Xuyong Yang
Summary: In this study, core/shell ZnO/ZnS nanoparticles were used as a solution-processed electron transport layer in PeLEDs. The deposition of ZnS shell mitigated trap states on ZnO core and removed residual hydroxyl groups, improving the performance of PeLEDs.
Article
Chemistry, Physical
Xinyu Shen, Hua Wu, Xiaoyu Zhang, Meili Xu, Junhua Hu, Jinyang Zhu, Bin Dong, William W. Yu, Xue Bai
Summary: The all-solution process for inorganic perovskite nanocrystals (PNCs) LEDs shows great potential for new-generation illumination and displays, but the challenge lies in the injection barriers and charge injection imbalance. The introduction of CBP into the hole transport layer (HTL) efficiently modulates the charge carrier mobility and energy level, resulting in barrier-free charge injection and optimal performance for solution-processed PNC LEDs. The luminance of red LEDs reaches 2990 cd m(-2) and the external quantum efficiency achieves 8.1%, with improved turn-on voltage and roll-off due to more balanced charge injection.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Shu-Jen Wang, Anton Kirch, Michael Sawatzki, Tim Achenbach, Hans Kleemann, Sebastian Reineke, Karl Leo
Summary: Conventional organic optoelectronic devices have low carrier mobility due to disorder. This study presents monolithic integrated triclinic crystal rubrene light-emitting diodes (LEDs) with engineered functional additives. The crystalline LEDs show superior charge transport, operational stability, and long-term stability. However, the crystalline phase reduces the overall performance compared to amorphous rubrene in terms of exciton dynamics and annihilation rates. The potential applications of rubrene and/or its derivatives crystalline films for improving the performance of organic and hybrid optoelectronic devices are discussed.
ADVANCED FUNCTIONAL MATERIALS
(2023)
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
Soon-Hwan Kwon, Tae-Hyeon Kim, Sang-Min Kim, Semi Oh, Kyoung-Kook Kim
Summary: By utilizing gold nanoparticles and a TiO2 shell layer, the gas sensor performance can be significantly enhanced, leading to increased sensitivity and faster response times.
Article
Chemistry, Physical
Islam Mohammad Shafiqul, Toshiyuki Yoshida, Yasuhisa Fujita
Summary: Heterojunction light-emitting diodes (LEDs) based on p-type ZnO and n-type ZnMgO nanoparticles have been successfully fabricated. The experimental results show that the LEDs with the p-ZnO/n-ZnMgO/GZO structure exhibit better I-V characteristics and lower leakage current compared to the p-ZnO/GZO LEDs, and the emission intensity is improved by adding the ZnMgO NP layer.
Review
Optics
Mahdiyar Nouri Rezaie, Shahram Mohammadnejad, Shabnam Ahadzadeh
Summary: The review paper discusses various hybrid inorganic/organic light-emitting diodes (I/O LEDs) based on zinc oxide (ZnO) and conjugated polymers, analyzing their structural, electrical, and optical characteristics and applications. Optoelectronic features of these hybrid LEDs are influenced by n-type ZnO nanostructures, and their electroluminescent intensity can be enhanced by selecting suitable p-type conjugated polymers or adding dopants. Challenges, comparisons, and future prospects of these hybrid LEDs, including the use of nanotubes, quantum dots, and perovskite layers, have also been explored.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Chemistry, Physical
Gencai Pan, Xue Bai, Xinyu Shen, Lei Wang, Yanli Mao, Xu Chen, Wen Xu, He Shao, Donglei Zhou, Biao Dong, Lin Xu, Junhua Hu, Hongwei Song
Summary: A direct synthetic method for CsPbI3 nanorods was developed using YCl3 promotion, resulting in high-efficiency red emitting CsPbI3 NCs with small aspect ratio and improved performance. The YCl3-promoted CsPbI3 NRs showed promising prospects in optoelectronic devices, exhibiting excellent luminescence and conductivity in LED applications.
Article
Chemistry, Multidisciplinary
Jaber Saghaei, Steven M. Russell, Hui Jin, Paul L. Burn, Almantas Pivrikas, Paul E. Shaw
Summary: This study investigates the impact of annealing and phase separation on the performance of solution-processed OLEDs, highlighting the improved performance of devices with a low dendrimer concentration in the emissive layer following annealing. The external quantum efficiency of the OLEDs is found to be higher than expected due to different pathways of exciton formation under photoexcitation and charge injection.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Tae Kyoung Kim, Abu Bashar Mohammad Hamidul Islam, Yu-Jung Cha, Seung Hyun Oh, Joon Seop Kwak
Summary: This work proposes an InGaN/GaN multiple-quantum-well flip-chip blue ultrathin side-emitting LED and improves the light extraction efficiency for increased light output power, making it suitable for backlight units.
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
Engineering, Environmental
Xinxin Ban, Tao Zhou, Kaizhi Zhang, Qingpeng Cao, Fengjie Ge, Dongen Zhang, Peng Zhu, Zunzheng Liu, Zimin Li, Wei Jiang
Summary: This study demonstrates for the first time that exciplex emission can be achieved by a single pure molecule, called homojunction exciplex. By using a flexible alkyl chain to link the donor and acceptor unit, the resulting compound maintains efficient exciplex emission property and eliminates phase separation issues. This research provides a new avenue for simplifying the structure and enhancing the stability of OLEDs.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Nanoscience & Nanotechnology
Jie Tang, Jianwei Chai, Jian Huang, Liyuan Deng, Xuan S. Nguyen, Linfeng Sun, T. Venkatesan, Zexiang Shen, Chuan Beng Tay, Soo Jin Chua
ACS APPLIED MATERIALS & INTERFACES
(2015)
Article
Physics, Applied
Xuan Sang Nguyen, Ke Lin, Eugene A. Fitzgerald, Soo Jin Chua
APPLIED PHYSICS LETTERS
(2015)
Article
Physics, Applied
Xuan Sang Nguyen, Xuan Long Goh, Li Zhang, Zeng Zhang, Aaron R. Arehart, Steven A. Ringel, Eugene A. Fitzgerald, Soo Jin Chua
JAPANESE JOURNAL OF APPLIED PHYSICS
(2016)
Article
Physics, Condensed Matter
X. S. Nguyen, H. W. Hou, P. De Mierry, P. Vennegues, F. Tendille, A. R. Arehart, S. A. Ringel, E. A. Fitzgerald, S. J. Chua
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2016)
Article
Nanoscience & Nanotechnology
David Kohen, Xuan Sang Nguyen, Sachin Yadav, Annie Kumar, Riko I. Made, Christopher Heidelberger, Xiao Gong, Kwang Hong Lee, Kenneth Eng Kian Lee, Yee Chia Yeo, Soon Fatt Yoon, Eugene A. Fitzgerald
Article
Engineering, Manufacturing
Xuan Sang Nguyen, Sachin Yadav, Kwang Hong Lee, David Kohen, Annie Kumar, Riko I. Made, Kenneth Eng Kian Lee, Soo Jin Chua, Xiao Gong, Eugene A. Fitzgerald
IEEE TRANSACTIONS ON SEMICONDUCTOR MANUFACTURING
(2017)
Article
Crystallography
David Kohen, Xuan Sang Nguyen, Riko I. Made, Christopher Heidelberger, Kwang Hong Lee, Kenneth Eng Kian Lee, Eugene A. Fitzgerald
JOURNAL OF CRYSTAL GROWTH
(2017)
Article
Engineering, Electrical & Electronic
R. I. Made, Yu Gao, G. J. Syaranamual, W. A. Sasangka, L. Zhang, Xuan Sang Nguyen, Y. Y. Tay, J. S. Herrin, C. V. Thompson, C. L. Gan
MICROELECTRONICS RELIABILITY
(2017)
Article
Chemistry, Physical
Chuan Beng Tay, Jie Tang, Xuan Sang Nguyen, Xiao Hu Huang, Jian Wei Chai, Venky T. Venkatesan, Soo Jin Chua
JOURNAL OF PHYSICAL CHEMISTRY C
(2012)
Article
Materials Science, Multidisciplinary
Nguyen Xuan Sang, Tay Chuan Beng, Tang Jie, Eugene A. Fitzgerald, Chua Soo Jin
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2013)
Proceedings Paper
Engineering, Electrical & Electronic
Sachin Yadav, Annie Kumar, Xuan Sang Nguyen, Kwang Hong Lee, Zhihong Liu, Weichuan Xing, Saeid Masudy-Panah, Kenneth Lee, Chuan Seng Tan, Eugene A. Fitzgerald, Dimitri A. Antoniadis, Yee-Chia Yeo, Xiao Gong
2017 IEEE INTERNATIONAL ELECTRON DEVICES MEETING (IEDM)
(2017)
