Article
Physics, Multidisciplinary
Hui Hu, Bin Qi, Yufan Zhao, Xiaoju Zhang, Yue Wang, Xinning Huang
Summary: In this paper, a graphene-based THz metasurface sensor with an air spacer layer is designed and studied. The sensor shows good absorption properties and sensitivity. It also demonstrates stability and reliability with respect to structural parameters and incident angles.
FRONTIERS IN PHYSICS
(2022)
Article
Thermodynamics
Nguyen Minh Phu, Pham Ba Thao, Nguyen Van Hap
Summary: This study presents a numerical investigation of an air collector duct with inclined baffles to reduce pressure loss and enhance the efficiency. The results show that using unequal baffle pitch can significantly reduce pressure loss and improve the collector's effective efficiency.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Xiaosong Cao, Ke Pan, Jingsheng Miao, Xialei Lv, Zhongyan Huang, Fan Ni, Xiaojun Yin, Yaxiong Wei, Chuluo Yang
Summary: In this study, a MR-TADF compound (BN-Se) with efficient spin-flip transition, fast radiative decay, close-to-unity quantum yield, and narrowband emission was reported. The compound showed excellent performance in OLEDs and as a photosensitizer, highlighting its potential beyond OLED applications.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Nanoscience & Nanotechnology
Xun Li, Guangming Wang, Jiuyang Li, Yan Sun, Xinjian Deng, Kaka Zhang
Summary: In this study, intense dopant-matrix afterglow systems have been reported with high afterglow efficiency and afterglow lifetime. Through the use of hydrogen bonding and deuteration techniques, the rate of reverse intersystem crossing of the dopant triplets is reduced, resulting in unexpectedly high afterglow brightness and duration even at room temperature. Triplet-triplet annihilation has also been observed at high doping concentrations to further enhance the afterglow efficiency.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Nan Gong, Runchen Lai, Shiyu Xing, Zhengzheng Liu, Junyao Mo, Tao Man, Zicheng Li, Dawei Di, Juan Du, Dezhi Tan, Xiaofeng Liu, Jianrong Qiu, Beibei Xu
Summary: This study proposes a novel strategy to enhance triplet-triplet annihilation upconversion (TTA-UC) by incorporating ionic-bonded CsPbBr3 and lanthanide Ce3+ ions into composite nanocrystals. This electronic state engineering increases the population of triplet excitons participating in energy transfer, enhances coupling strength and driving force, and ultimately leads to a nonlinear enhancement of UC efficiency. The findings clarify the functions of electronic state engineering in inorganic sensitizers and TTA-UC.
Article
Materials Science, Multidisciplinary
Chathuranganie A. M. Senevirathne, Seiya Yoshida, Morgan Auffray, Masayuki Yahiro, Buddhika S. B. Karunathilaka, Fatima Bencheikh, Kenichi Goushi, Atula S. D. Sandanayaka, Toshinori Matsushima, Chihaya Adachi
Summary: Organic semiconductors face challenges in achieving continuous-wave lasing due to triplet quenching of singlets via singlet-triplet annihilation (STA). This study introduces a triplet recycling process utilizing triplet-triplet annihilation (TTA) to convert triplets into emissive singlet excitons in a laser medium, allowing for long pulse operation without the detrimental effects of STA. The unique triplet recycling behavior is confirmed through transient photoluminescence and electroluminescence studies.
ADVANCED OPTICAL MATERIALS
(2022)
Review
Chemistry, Inorganic & Nuclear
Waqas Ahmad, Jingjing Wang, Huanhuan Li, Qin Ouyang, Wanhua Wu, Quansheng Chen
Summary: This review article summarizes the latest advances in triplet-triplet annihilation upconversion (TTA-UC), covering aspects such as substrate patterns, excited-state engineering, and potential applications, aiming to extend the research scope of this technology.
COORDINATION CHEMISTRY REVIEWS
(2021)
Article
Chemistry, Applied
Yu Qin, Xuemei Yuan, Yi Wang, Yuanyuan Che, Lei Sun, Jianzhang Zhao, Haijun Xu
Summary: Developing organic triplet photosensitizers with excellent performance is crucial for upconversion applications. In this study, a novel truxene-linked coumarin-corrole triads (C-Trux-Corr) was synthesized and its photophysical properties were investigated. The results showed efficient intramolecular singlet energy transfer within the triad and the triplet excited states were mainly distributed on the corrole moiety. Moreover, the triplet state lifetime of C-Trux-Corr was significantly prolonged, and it exhibited a higher upconversion quantum yield compared to corrole itself.
Article
Biochemical Research Methods
Arnab Mallik, Lucian Ilie
Summary: Sequence similarity is crucial in biological research, and the sensitivity of spaced seeds is essential for improving programs like BLAST. The new algorithm ALeS has been shown to produce more sensitive seeds than current programs, with accurate sensitivity estimation for arbitrary seeds.
Article
Chemistry, Multidisciplinary
Cui Wang, Florian Reichenauer, Winald R. Kitzmann, Christoph Kerzig, Katja Heinze, Ute Resch-Genger
Summary: This study achieved efficient green-to-blue upconversion by using the earth-abundant chromium complex [Cr(bpmp)(2)](3+), with a quantum yield close to the theoretical maximum, showing potential for practical applications.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Lili Hou, Axel Olesund, Shameel Thurakkal, Xiaoyan Zhang, Bo Albinsson
Summary: This study systematically investigates the use of different sized CdS nanocrystals for visible-to-UV photon upconversion systems based on triplet-triplet annihilation. By improving the quality of CdS nanocrystals and introducing mediators through direct mixing, they achieve a record TTA-UC quantum yield of 10.4%. In-depth investigation reveals that the direct mixing approach for introducing mediators is crucial for close to unity efficiencies of triplet energy transfer, ultimately governing the performance of NC-based TTA-UC systems.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Applied
Bo Fu, Yuanyuan Che, Xuemei Yuan, Lei Sun, Haijun Xu, Jianzhang Zhao, Lang Liu
Summary: Triplet photosensitizers T-P-Co and T-C-60-P-Co were synthesized and used for triplet-triplet annihilation upconversion with efficient energy transfer and high quantum yields observed. Electrochemical investigation revealed thermodynamic limitations for photo-induced electron transfer in toluene, while nanosecond time-resolved experiments showed triplet excited states distributed on the corrole moiety.
Article
Chemistry, Multidisciplinary
Javier Ramos-Soriano, Alfonso Perez-Sanchez, Sergio Ramirez-Barroso, Beatriz M. Illescas, Khalid Azmani, Antonio Rodriguez-Fortea, Josep M. Poblet, Cormac Hally, Santi Nonell, David Garcia-Fresnadillo, Javier Rojo, Nazario Martin
Summary: In this study, an ultra-long-lived triplet state with a mean lifetime of 93 ms in an aqueous phase at room temperature was discovered. Different tridecafullerenes were synthesized and characterized, confirming aggregation in water. The study also revealed that the inner solvation of multifullerenes varies depending on their molecular design.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Rachel E. Bangle, Hengming Li, Maiken H. Mikkelsen
Summary: The nonlinear conversion of photons plays a critical role in various applications. Triplet-triplet annihilation upconversion (TTA UC) offers a promising approach for upconversion applications using low-intensity light. In this study, TTA UC emission from a thin film is significantly improved by integrating it into plasmonic nanogap cavities. The absorption rate enhancement is identified as the main mechanism responsible for the overall enhancement of TTA UC emission. The research also demonstrates the expansion of the usable spectrum and provides design rules for TTA UC emission enhancement using plasmonic nanostructures.
Article
Multidisciplinary Sciences
Ling Huang, Timmy Le, Kai Huang, Gang Han
Summary: This study successfully overcomes the oxygen-induced quenching of triplet-triplet annihilation upconversion in aqueous solutions using an enzymatic strategy, allowing for the development of highly specific, sensitive, and background-free sensors for glucose and enzymes related to glucose metabolism.
NATURE COMMUNICATIONS
(2021)
