Article
Optics
Zhiwei Ma, Junxia Hu, Liping Tang, Bingbing Lyu
Summary: Optimizing the preparation of blue ZnCdSeS/ZnS quantum dots by controlling nucleation and growth kinetics enhances device performance, showing excellent luminescent properties and long lifetimes.
PHOTONICS RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Qin Zhang, Yaping Zhao, Xiangqian Qin, Mingliang Li, Haoran Sun, Peng Zhou, Wenjing Feng, Yuqing Li, Jianxun Lu, Kebin Lin, Lei Shi, Zhanhua Wei
Summary: In this study, a four-layered design was proposed to manage carrier behavior and improve radiative recombination efficiency in metal halide perovskite light-emitting diodes (Pero-LEDs) by inserting a nickel acetate (Ni(OAc)2) interlayer. The Ni(OAc)2 interlayer balanced hole-electron injection, reduced interfacial carrier quenching, and confined carrier recombination zone, leading to a maximum external quantum efficiency (EQEmax) of 24.6% with good reproducibility.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Linyu Cao, Zhi-Qiang Zhu, Kody Klimes, Jian Li
Summary: The tetradentate Pd(II) complexes exhibit promise in efficient and stable OLEDs, with slight changes in ligand structure being able to modify transport capabilities and enhance device lifetime performance.
ADVANCED MATERIALS
(2021)
Article
Optics
Lingjie Fan, Maoxiong Zhao, Jiao Chu, Tangyao Shen, Minjia Zheng, Fang Guan, Haiwei Yin, Lei Shi, Jian Zi
Summary: We propose a new theory with three orientation parameters to describe the relationship between dipole orientation and power density in OLEDs. We also design a test structure to measure all three orientation parameters. Our theory provides a universal plot of dipole orientations in OLEDs, facilitating the design of more complex OLED devices.
CHINESE OPTICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Yunke Zhu, Yunzhou Deng, Peng Bai, Xinan Wu, Yige Yao, Qinyun Liu, Jingjing Qiu, An Hu, Zhenyu Tang, Wenjin Yu, Yaolong Li, Pengzuo Jiang, Zhetong Liu, Peng Gao, Yanlei Hao, Wangxiao Jin, Desui Chen, Xitong Zhu, Yizheng Jin, Yunan Gao
Summary: This study demonstrates efficient, bright, and long lifetime red Nc-LEDs based on anisotropic nanocrystals. By modifying the substrate's surface properties and controlling the interactions among nanocrystals, a self-assembled layer with a high distribution of in-plane transitions dipole moment of 95% is successfully achieved, resulting in an out-coupling factor of 37%.
ADVANCED MATERIALS
(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
Nanoscience & Nanotechnology
Zhanhua Wei, Yaping Zhao, Mingliang Li, Xiangqian Qin, Wen-Hua Zhang
Summary: Metal halide perovskite films are commonly prepared using solution-based methods, but this can result in defects at the interface between the perovskite layer and charge transport layers, which limits the performance of perovskite light-emitting diodes. Researchers have proposed strategies to address this issue, but most studies focus on modifying the top interface rather than the buried interface. In this study, triphenylphosphine oxide (TPPO) molecules were deposited at the buried interface between the perovskite and hole transport layer, improving film quality and passivating halogen vacancy defects. This led to a maximum external quantum efficiency of 21.01% and enhanced device reproducibility.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Ming-Lei Guo, Yu Lu, Xiao-Yi Cai, Yang Shen, Xiao-Yan Qian, Hao Ren, Yan-Qing Li, Wen-Jun Wang, Jian-Xin Tang
Summary: A rational interface engineering method was proposed to enhance the interfacial crystallization and radiative recombination of perovskite films in order to achieve high-performance perovskite light-emitting diodes.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Nanoscience & Nanotechnology
Fanghao Ye, Huibo Yan, Siyang Liu, Baoxing Liu, Zhiqing Zhang, Mengyao Tian, Ting Zheng, Xi Lan, Jincheng Huang, Chunfeng Meng, Ping Xu, Guijun Li
Summary: This study finds that using quaternary ammonium-based ionic liquids as an interfacial modification layer in perovskite light-emitting diodes (PeLEDs) can significantly improve the device efficiency and stability. The interaction between quaternary ammonium ions and perovskite films improves the morphology and suppresses ion migration.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Yang Shen, Kong-Chao Shen, Yan-Qing Li, Minglei Guo, Jingkun Wang, Yongchun Ye, Feng-Ming Xie, Hao Ren, Xingyu Gao, Fei Song, Jian-Xin Tang
Summary: This research proposes a novel crystallization strategy and rational interfacial engineering to enhance deep-blue emission in perovskite grains, resulting in significantly improved device performance for PeLEDs.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Yang Shen, Jing-Kun Wang, Yan-Qing Li, Kong-Chao Shen, Zhen-Huang Su, Li Chen, Ming-Lei Guo, Xiao-Yi Cai, Feng-Ming Xie, Xiao-Yan Qian, Xingyu Gao, Ivan S. Zhidkov, Jian-Xin Tang
Summary: This study presents an interface engineering scheme using a multifunctional molecule APDO to manipulate the crystallization of perovskite films, resulting in improved radiative recombination and hole-transport capability for large-area blue perovskite light-emitting diodes. The interface engineering enabled sky-blue perovskite films with uniformity and low trap states, leading to enhanced device performance with peak external quantum efficiency of 9.2% for 100 mm^2 devices and up to 6.1% for 400 mm^2 devices.
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
Chemistry, Multidisciplinary
Seunghyun Rhee, Donghyo Hahm, Hae-Jun Seok, Jun Hyuk Chang, Dongju Jung, Myeongjin Park, Euyheon Hwang, Doh C. Lee, Young-Shin Park, Han-Ki Kim, Wan Ki Bae
Summary: By controlling the orientation of molecular dipoles on the surfaces of NiO HTL and QDs, bright and stable all-inorganic QD-LEDs were achieved with high external quantum efficiency and brightness, along with prolonged operational stability.
Article
Nanoscience & Nanotechnology
Kaiyu Yang, Jinping Zheng, Jinliang Mao, Haobing Zhao, Songman Ju, QingKai Zhang, Zhihan Lin, Yongshen Yu, Fushan Li
Summary: In this study, an interface-induced crystallinity enhancement (IICE) strategy was used to improve the crystallinity of perovskite quantum dot films, reducing defects and interfacial defects, as well as suppressing leakage current. The resulting quantum dot light-emitting diodes (QLEDs) showed significantly improved performance with a maximum external quantum efficiency (EQE) of 16.45% and current efficiency (CE) of 61.77 cd/A.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Yan-Lin Xu, Xuan Lv, Min Zhu, Shuang-Qiao Sun, Wei He, Jun-Gui Zhou, Yue-Min Xie, Man-Keung Fung
Summary: In this study, efficient electron-transport layers (ETLs) for PeLEDs were formed by co-evaporating a high-mobility pyridine-based electron transport material, TmPyPB, with TPBi. The interaction between TmPyPB and the uncoordinated Pb2+ ions effectively passivates perovskite defects and enhances electron mobility, resulting in higher device efficiency.
MATERIALS TODAY ENERGY
(2023)
Article
Chemistry, Physical
Kusum Sharma, Vasudha Hasija, Shilpa Patial, Pardeep Singh, Van-Huy Nguyen, Ashok Kumar Nadda, Sourabh Thakur, Phuong Nguyen-Tri, Chinh Chien Nguyen, Soo Young Kim, Quyet Van Le, Pankaj Raizada
Summary: The emerging class of 2D MXenes is suitable for water splitting as catalysts due to their tunable structures, large surface area, high electrical conductivity, rich surface chemistries, hydrophilicity, and large redox active sites. However, the agglomeration, reduced stability, and recyclability pose limitations. The coupling of MXenes with MOFs provides a preferential environment for hosting MXene to prevent agglomeration. This review showcases the synergistic effects of MXenes and MOFs hybrids and discusses their properties, synthetic strategies, and future challenges.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Nanoscience & Nanotechnology
Seon Ju Park, Young Kook Moon, Sei-Woong Park, Soo Min Lee, Tae-Hyun Kim, Soo Young Kim, Jong-Heun Lee, Young-Moo Jo
Summary: Real-time breath isoprene sensing provides non-invasive methods for monitoring human metabolism and early diagnosis of cardiovascular diseases. In this work, Co3O4@polyoxometalate yolk-shell structures were derived and showed selective isoprene detection with high chemiresistive response and low detection limit. The sensor's high performance is attributed to electronic sensitization and catalytic promotion effects, and its practical feasibility is demonstrated in smart healthcare applications.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
In Hyuk Im, Seung Ju Kim, Ji Hyun Baek, Kyung Ju Kwak, Tae Hyung Lee, Jin Wook Yang, Da Eun Lee, Jae Young Kim, Hee Ryeong Kwon, Do Yeon Heo, Soo Young Kim, Ho Won Jang
Summary: This study proposes an efficient methodology to integrate halide perovskites as functional materials for memristive crossbar arrays. By controlling the doping concentration of Ag in MAPbI(3), the resistance change characteristics can be tailored. The results show that MAPbI(3) with different Ag contents can achieve different threshold and resistive switching characteristics. Finally, by coupling these switches into 1S-1R integrated components, a larger crossbar array size is achieved.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jin Hyuk Cho, Chaehyeon Lee, Sung Hyun Hong, Ho Yeon Jang, Seoin Back, Myung-gi Seo, Minzae Lee, Hyung-Ki Min, Youngheon Choi, Youn Jeong Jang, Sang Hyun Ahn, Ho Won Jang, Soo Young Kim
Summary: This study demonstrates the efficient electrocatalytic conversion of CO2 to CO using zeolite-imidazolate-frameworks-8 (ZIF-8) doped with transition metal ions (Ni, Fe, and Cu). The optimized Cu-doped ZIF-8 showed high partial current density and maximum Faradaic efficiency, with stable catalytic activity. The study also provides insights into the CO2 reduction pathway.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Tuan Van Nguyen, Thang Phan Nguyen, Quyet Van Le, Dung Van Dao, Sang Hyun Ahn, Soo Young Kim
Summary: In this study, a facile, inexpensive, and scalable method for the fabrication of extremely small MoS2 NFs (SNFs) was proposed for the first time. The SNFs exhibited enhanced catalytic activity compared to conventional MoS2 NFs due to the increased number of active sites. The SNFs also showed superior electrocatalytic performance for hydrogen evolution reaction, with low Tafel slope, overpotential, and high stability in an acidic environment.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Environmental
Jooyoung Kim, Hyunki Kim, Sungjun Kim, Jue-Hyuk Jang, Hyuntae Sohn, Seok Jin Hong, Junhyeong Kim, Gyeong Ho Han, Seonghyun Choe, Yung-Eun Sung, Soo Young Kim, Ho Won Jang, Tae Hwan Jo, Hyung-Kyu Lim, Sung Jong Yoo, Sang Hyun Ahn
Summary: This study presents a simple electrochemical strategy to fabricate atomic Pt clusters on Au dendrites, resulting in a significantly reduced Pt loading. The prepared Pt/Au/CP sample exhibits high selectivity for formic acid oxidation reaction and maintains stable activity even after cycling tests.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Chemistry, Multidisciplinary
Gyeong Ho Han, Junbeom Bang, Gaeun Park, Seonghyun Choe, Youn Jeong Jang, Ho Won Jang, Soo Young Kim, Sang Hyun Ahn
Summary: Environmental problems, including global warming, are major global challenges, and researchers are exploring various methods to reduce CO2 emissions. The CO2 reduction reaction has attracted significant attention due to its potential utilization of renewable energy sources. This reaction converts stable CO2 molecules into valuable hydrocarbon products such as CO, CH4, C2H4, and C2H5OH. The conversion into hydrocarbons above C-2 is crucial for economic benefits. Investigations have shown that Cu-based catalysts play a unique role in the C-C coupling reaction for electrocatalysis. This review provides an overview of the CO2 reduction reaction via electrochemical, photochemical, and photoelectrochemical processes, including the mechanism of hydrocarbon formation and recent advancements.
Article
Energy & Fuels
Sumit Kumar, Sunil Kumar, R. N. Rai, Youngil Lee, Thi Hong Chuong Nguyen, Soo Young Kim, Quyet Van Le, Laxman Singh
Summary: High-efficiency functionalized dye-sensitized solar cells (DSSCs) have gained attention as next-generation solar photovoltaics due to their low production costs, flexibility, transparency, and sustainable outputs. The structural transformation of the photoanode materials plays a crucial role in enhancing the conversion efficiency of DSSCs. Two-dimensional (2D) functionalized photoanodes have shown great potential in reducing charge recombination efficiency and promoting photoexcited electron transfer.
Article
Nanoscience & Nanotechnology
Ha Huu Do, Mahider Asmare Tekalgne, Quyet Van Le, Jin Hyuk Cho, Sang Hyun Ahn, Soo Young Kim
Summary: In this study, H-Ni/NiO/C catalysts were synthesized from a Ni-based metal-organic framework (MOF) and demonstrated superior electrocatalytic activity for the hydrogen evolution reaction (HER). The catalyst exhibited low overpotential and high Tafel slope, attributed to the synergistic effect of the metal/metal oxide and hollow architecture. The results suggest that this approach holds promise for the fabrication of cost-effective catalysts for hydrogen production in alkaline media.
Article
Engineering, Chemical
Minh Tuan Nguyen Dinh, Chinh Chien Nguyen, Nga Hang Thi Phan, Hoang Duy Nguyen Phuc, Quyet Van Le, Soo Young Kim, Lam Nguyen-Dinh
Summary: This investigation aims to tailor surface oxygen vacancies and active surface oxygen in MnO2 catalysts by doping copper, and achieve total catalytic oxidation of various VOCs. The results show that low-level Cu doping leads to the formation of tunnel-structured cryptomelane-type MnO2 with strong bulk oxygen mobility, exhibiting the best catalytic performance for toluene oxidation. Higher Cu loading results in Cu-doped layered birnessite-type MnO2 materials with rich oxygen vacancies and high active surface oxygen species, promoting the oxidation of isopropanol and formaldehyde, respectively. Oxygen vacancies and surface oxygen species play a crucial role in promoting the total oxidation of VOCs.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Energy & Fuels
Mahider Asmare Tekalgne, Ha Huu Do, Tuan Van Nguyen, Quyet Van Le, Jusung An, Sung Hyun Hong, Sang Hyun Ahn, Heemin Kang, Jong Seung Kim, Soo Young Kim
Summary: Developing a low-cost hybrid electrocatalyst for hydrogen production is crucial. MXene-based materials with layered structure and strong electrical conductivity have been increasingly used in energy storage devices. In this study, heteroatom- (boron and sulfur-) doped MXene (B, S-Ti3C2Tx) nanosheets were synthesized and demonstrated as efficient electrocatalysts for the hydrogen evolution reaction (HER). The synthesized B, S-Ti3C2Tx exhibited a large surface area and excellent electrocatalytic activity in acidic media, with low overpotential and Tafel slope, as well as maintaining steady catalytic activity over 1000 cycles.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2023)
Review
Chemistry, Physical
Won Jin Jang, Ho Won Jang, Soo Young Kim
Summary: A tandem solar cell consisting of wide bandgap (WBG) and narrow bandgap (NBG) subcells achieves higher efficiency by capturing maximum photons in a wide spectral range. Lead mixed-halide WBG perovskite solar cells (PSCs) have shown excellent performance, but their commercialization is hindered by lead toxicity and low stability. This review discusses strategies to develop high-efficiency lead-free WBG PSCs, addressing issues like V-OC loss and toxicity associated with lead-based perovskites, and presenting recent advancements in enhancing device performance.
Article
Chemistry, Physical
Tuan Van Nguyen, Thang Phan Nguyen, Quyet Van Le, Dung Van Dao, Sang Hyun Ahn, Soo Young Kim
Summary: Recently, researchers have extensively investigated catalysts based on tungsten disulfide nanoflowers (WS2 NFs) and tungsten carbide (W2C) materials for hydrogen evolution reaction (HER). In this study, a facile and scalable method was used to synthesize a nano hollow flowers catalyst based on heterostructure of WS2 and W2C (WS2/W2C NHFs). Comparative analysis of different tungsten compounds' structures and HER activities was conducted. The results show that WS2/W2C NHFs exhibits superior HER activity compared to WS2-WO3 flower particles (FPs) and pure WS2 NFs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Mahider Asmare Tekalgne, Ha Huu Do, Tuan Van Nguyen, Quyet Van Le, Sung Hyun Hong, Sang Hyun Ahn, Soo Young Kim
Summary: Designing low-cost hybrid electrocatalysts for hydrogen production is important. In this study, WS2/Ti3C2 nanosheets were successfully synthesized and exhibited high electrocatalytic activity and stability in the hydrogen evolution reaction.
Article
Chemistry, Multidisciplinary
Youngho Kim, Noeul Kim, Sang Hoon Lee, Seok-Ki Hyeong, Jae-Hyun Lee, Jaeyeong Lee, Jong Seong Bae, In Sun Cho, Jae-Young Choi, Soo Young Kim, Hak Ki Yu
Summary: The development of technologies for electromagnetic wave contamination has attracted attention. For high frequencies such as those in the K and K-a ranges, there is a limitation in using only one material. To address this, it is necessary to increase the absorption coefficients by increasing the path of electromagnetic waves using internal scattering. This study accurately demonstrated the role of Sn in the growth of indium tin oxide (ITO) nano-branch structure, resulting in high-density ITO nano-branches with the thinnest possible thickness. With shielding efficiencies of 21.09 dB (K band) and 17.81 dB (K-a band), it is expected to be applied in various fields due to its high specific shielding efficiency, low thickness, and weight.
Article
Materials Science, Multidisciplinary
Jinfei Dai, Chenjing Zhao, Jie Xu, Hossein Roshan, Hua Dong, Francesco Di Stasio, Fang Yuan, Bo Jiao, Zhaoxin Wu
Summary: In this study, the performance of perovskite nanocrystal light emitting diodes (PNC-LEDs) was enhanced through rational device structure design and the application of high-performance perovskite nanocrystal emitting layers.
ORGANIC ELECTRONICS
(2024)
Article
Materials Science, Multidisciplinary
Jia-Hua Yeh, Suhendro Purbo Prakoso, Leon Lukhas Santoso, Shi-Ju Chen, Bryan Chiang, Ju-Chieh Cheng, Ru-Ning Zhang, Yu-Cheng Chiu
Summary: This study demonstrates the application of a renewable material called dextrin-SMS in the production of electret filters and transistor memory. Dextrin-SMS material can maintain prolonged electrostatic charges and has a relatively wide memory window, making it suitable for the production of biodegradable face masks and green electronics.
ORGANIC ELECTRONICS
(2024)
Article
Materials Science, Multidisciplinary
Ahmad Telfah, Qais M. Al-Bataineh, Ahmad A. Ahmad, Rund Abu-Zurayk, Carlos J. Tavares, Johannes Etzkorn, Farzad Foadian
Summary: Polyacrylic acid complexed with polyaniline (PAA/PANI) composite materials have the potential to form organic mixed ion-electron conductive (OMIEC) films, which can be used in optoelectronic and energy storage applications. The composite films are formed through an acid-base reaction, resulting in strong electrostatic interactions and intermolecular hydrogen bonds between PANI and PAA. The separation of PANI-rich domains from PAA-rich matrix in the composite films is observed. The electrical conductivity of the composite films is higher when the content of PANI is 33 wt%, due to the high ionic-electronic coupling at the interface between phase-separated regions.
ORGANIC ELECTRONICS
(2024)
Article
Materials Science, Multidisciplinary
Min-Chih Hou, Dian Luo, Yu-Ting Huang, Shun-Wei Liu, Chin-Wei Lu, Chih-Hao Chang, Hai-Ching Su
Summary: Light-emitting electrochemical cells (LECs) have great potential for novel emission applications, but their relatively low device efficiency hinders their competitiveness with other emission technologies. A study finds that increasing the concentration of small TiO2 nano-particles in the diffuser film can enhance light extraction and improve the device efficiency of LECs.
ORGANIC ELECTRONICS
(2024)
Article
Materials Science, Multidisciplinary
Qiaoli Niu, Yao Xu, Jun Yang, Wei Hua, Baoxiang Chai, Zequan Zhang, Yuhui Ma, Wenjin Zeng, Ana Flavia Nogueira, Ruidong Xia
Summary: By introducing CPB as a defect passivation agent in the perovskite precursor solution, the optoelectronic properties of perovskite films can be significantly improved and non-radiative carrier recombination can be effectively suppressed. CPB-modified perovskite solar cells exhibit lower trap-state density and stronger carrier migration capability, leading to enhanced power conversion efficiency and stability.
ORGANIC ELECTRONICS
(2024)
Article
Materials Science, Multidisciplinary
Hulya Ozturk Dogan, Fatma Yildirim, Zeynep Orhan, Ali Ben Ahmed, Mostefa Benhaliliba, Sakir Aydogan
Summary: In this study, efficient self-powered visible and UV photodetectors based on hybrid organic-inorganic materials were demonstrated. The photodetectors showed excellent UV detecting capability and good photoresponsivity.
ORGANIC ELECTRONICS
(2024)