Review
Chemistry, Multidisciplinary
Fabrizio Guzzetta, Cameron W. Jellett, Jalal Azadmanjiri, Pradip Kumar Roy, Saeed Ashtiani, Karel Friess, Zdenek Sofer
Summary: The attention in recent decades has been focused on the optoelectronic properties of indium and gallium chalcogenides, leading to advancements in fundamental and applied science. Group III-VI compounds have laminated structures that can be exfoliated to monolayers. Besides indium and gallium chalcogenides, there are other uncommon compounds in the family of group III-VI compounds, which have various crystal lattices, including layered structures. Aluminum chalcogenides show potential as anodes in batteries and semiconductors. Studies on thallium-based compounds are still exploring their semiconducting and thermoelectric properties. This review aims to summarize the significant features of these unusual materials and propose new studies to revive their potential in future technology.
Article
Chemistry, Physical
Yiwei Shen, Wenhao Li, Kun Wang, Rong Chen, Chaoxing Wu, Xiongtu Zhou, Yongai Zhang, Yin Xiao, Suling Zhao, Tailiang Guo
Summary: The study successfully demonstrates non-carrier-injection electroluminescence (NCI-EL) from monolayer quantum dots, proposing a working mechanism related to periodic in-well ionization. The effects of driving voltage amplitude, frequency, and quantum dot size on NCI-EL performance are investigated, clarifying the ionization process.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
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, 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.
Article
Optics
Hyun Jeong, Ga Hyun Cho, Mun Seok Jeong
Summary: We propose an efficient method to reduce efficiency droop in InGaN QWs by redistributing carrier localization through thermal annealing, resulting in increased internal quantum efficiency (IQE) in this study.
JOURNAL OF LUMINESCENCE
(2022)
Article
Chemistry, Physical
Giane B. Damas, Karl Ronnby, Henrik Pedersen, Lars Ojamae
Summary: This report investigates the reaction pathways and mechanisms involved in the crystal growth of indium nitride (InN) thin film in atomic layer deposition (ALD) techniques using trimethylindium (TMI) and ammonia (NH3) precursors. The study provides important insights for the optimization of InN film preparation.
APPLIED SURFACE SCIENCE
(2022)
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
Zhi-Yuan Yu, Yu-Chen Zhang, Shuai Li, Xi-Yuan Dai, Xia-Yan Xue, Hong Shen, Song -You Wang, Ming Lu
Summary: A synergistic approach of interface engineering is reported to efficiently improve the performance of silicon nanocrystal light-emitting diode (Si-NC LED). This method can significantly increase the brightness of the LED by improving charge injection and transport, and controlling the radiative recombination of the injected charges.
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
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
Nanoscience & Nanotechnology
Natsuko Urushihara, Tadahiko Hirai, Akansha Dager, Yuta Nakamura, Yuma Nishi, Ken Inoue, Ryo Suzuki, Makoto Tanimura, Kazuteru Shinozaki, Masaru Tachibana
Summary: Natural product-derived carbon dots have successfully achieved electroluminescence, showing great potential for applications in LEDs.
ACS APPLIED NANO MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Ioannis E. Fragkos, Wei Sun, Damir Borovac, Renbo Song, Jonathan J. Wierer, Nelson Tansu
Summary: This study investigates an active region design based on InGaN / delta-InN quantum well (QW) for potential high-efficiency visible light emitters. The results demonstrate a large wavelength redshift and an increase in the electron-hole wavefunction overlap for the delta-structure compared to the conventional InGaN QW.
IEEE JOURNAL OF QUANTUM ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Jie Ren, Bo Yu, Feng Zhu, Donghang Yan
Summary: Crystalline organic light-emitting diodes (C-OLEDs) show great potential in the OLED field, thanks to their high carrier mobility, thermal stability, and chemical stability. These characteristics of C-OLEDs result in low turn-on voltage, low operating voltage, high light output, high power efficiency, and low Joule heat loss. The paper focuses on how the size of nanoaggregates affects the electron conductivity of CHM-HENA OLEDs.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
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
Chen-Zong Yang, Ze-Hui Pan, Kai Zhang, Jing-Wen Tai, Chuan-Kui Wang, Lei Ding, Man-Keung Fung, Jian Fan
Summary: Thermally activated delayed fluorescence (TADF) materials with emission in the deep red and near infrared (DR/NIR) region are underresearched due to the limited choice of strong donor/acceptor units. The current mainstream strategy for the design of DR/NIR TADFs is to increase the acceptor strength via the introduction of multiple sub-acceptor units, thereby narrowing the bandgap. In this work, the intramolecular charge transfer (ICT) effect was applied for the development of acceptor units to achieve efficient DR/NIR TADFs.
MATERIALS HORIZONS
(2023)
