Article
Optics
Pengfei Xia, Shuhong Xu, Chunlei Wang, Dayan Ban
Summary: Perovskite-based LSCs have attracted much attention due to their convenient preparation process, low cost, and high quantum yields, but optical losses have been a major issue affecting their performance. Various strategies have been implemented to enhance the optical performance, and cutting-edge solutions have been proposed to enable high-performance perovskite-based LSCs.
Article
Chemistry, Multidisciplinary
Teng Zhang, Youru Bai, Shaohuan Feng, Qifan Xue, Xiaotian Hu, Xueqing Xu, Heyuan Liu, Yuriy N. Luponosov, Muhammad Bilal Khan Niazi, Xiyou Li
Summary: This study reports the synthesis of well-dispersed highly emitting perovskite emitters through the surfactant-assisted ball-milling method. The emitting peaks and colour purity of the synthesized perovskite emitters can be effectively controlled through additive functionalization and precursor engineering.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Teng Zhang, Youru Bai, Shaohuan Feng, Qifan Xue, Xiaotian Hu, Xueqing Xu, Heyuan Liu, Yuriy N. Luponosov, Muhammad Bilal Khan Niazi, Xiyou Li
Summary: We synthesized well-dispersed and highly emitting perovskite emitters using the surfactant-assisted ball-milling method, and their emitting peaks and color purity can be effectively tuned through additive functionalization and precursor engineering.
CHEMICAL COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Tian Tian, Meifang Yang, Yuxuan Fang, Shuo Zhang, Yuxin Chen, Lianzhou Wang, Wu-Qiang Wu
Summary: Lead halide perovskites have great potential for wearable optoelectronics, but their instability under light, moisture, and temperature stress, leakage of toxic lead ions, and difficulties in large-scale production of uniform luminescent textiles have hindered their real-world applications. This study presents a simple and high-throughput method to fabricate large-area, flexible, and waterproof perovskite luminescent textiles. These textiles exhibit bright and narrow-band photoluminescence, high stability under various conditions, and no leaching of lead ions. They can be applied in marine rescue due to their low cost and scalability.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Aifei Wang, Faheem Muhammad, Yao Liu, Zhengtao Deng
Summary: The study presents the first synthesis of Mn2+ doped Cs3Sb2Clx/Br9-x (0 <= x <= 9) perovskite quantum dots, which exhibit bright photoluminescence emission at 660 nm and a high quantum yield of approximately 49%, showcasing their potential for optical applications.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Qi Liu, Jun Yin, Bin-Bin Zhang, Jia-Kai Chen, Yang Zhou, Lu-Min Zhang, Lu-Ming Wang, Qing Zhao, Jingshan Hou, Jie Shu, Bo Song, Naoto Shirahata, Osman M. Bakr, Omar F. Mohammed, Hong-Tao Sun
Summary: Through density functional theory calculations and molecular dynamics simulations, a theory-guided general synthetic concept for highly luminescent CsSnX3 nanocrystals has been developed. A colloidal synthesis strategy has been established to produce high-quality CsSnX3 nanocrystals under different reaction conditions, which may stimulate intense efforts on tin-based perovskite nanocrystals for potential applications in high-performance optoelectronic devices.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Zonghui Duan, Shixun Wang, Jinsong Qi, Arsenii S. Portniagin, Aaron Doering, Stephen Kershaw, Andrey L. Rogach
Summary: A facile approach was developed to fabricate highly luminescent and stable quasi-two-dimensional/three-dimensional perovskite films, which exhibited strong luminescence and stability in water for several tens of minutes without encapsulation. The high photoluminescence quantum yield of 91% was attributed to the efficient energy funneling between two-dimensional and three-dimensional perovskite phases and the passivation effect of the organic additive.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Multidisciplinary Sciences
Yuncong Liu, Tao Chen, Zhekai Jin, Mengxue Li, Dongdong Zhang, Lian Duan, Zhiguo Zhao, Chao Wang
Summary: A luminescent composite that is simultaneously transparent, tough and can autonomously self-heal in both dry and wet conditions has been reported. This material has excellent mechanical performance and can withstand extreme aqueous environments, making it important for the development of underwater wearable devices and water-resistant equipment.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Haihua Zhang, Jiannian Yao, Kaige Zhou, Yongan Yang, Hongbing Fu
Summary: A soluble luminescent thermometer based on thermally activated dual-emissions of Mn2+-alloyed 2D perovskite quantum wells has been reported. The temperature-dependent charge transfer efficiency allows for continuous ratiometrical modulation, making it suitable for monitoring the ultracold-chain logistics of COVID-19 vaccines.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Syed Akhil, V. G. Vasavi Dutt, Nimai Mishra
Summary: This study introduced a novel, open-atmosphere, amine-free synthesis method for cesium lead bromide perovskite nanocrystals, utilizing inexpensive bromopropane as a bromine precursor. The surface passivation route facilitated stable ligand capping on the nanocrystal surface, resulting in highly monodisperse nanocrystals with strong stability and high photoluminescence quantum yield. Additionally, the nanocrystals showed potential for use in stable down-converted LED devices, making them ideal for display applications.
Article
Chemistry, Physical
Kaliyamoorthy Justice Babu, Gurpreet Kaur, Ayushi Shukla, Arshdeep Kaur, Tanmay Goswami, Nandan Ghorai, Hirendra N. Ghosh
Summary: Research indicates that Mn-doped CsPbBr3 nanoplatelets exhibit rapid charge and energy transfer processes, which may help clarify unresolved anomalies in Mn-doped perovskites.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Zhuo Chen, Lvming Dong, Cheng Zhou, Binze Zhou, Zhi Zheng, Rong Chen, Jianfeng Zang
Summary: This study reports a moderate-temperature and atmospheric approach to synthesize highly luminescent Mn-doped CsPbCl3 nanoplatelets with only 4 monolayers. The nanoplatelets exhibit a high photoluminescence quantum yield and excellent stability for over 60 days at room temperature, enabling the first achievement of orange-red and warm white light-emitting diodes (LEDs) with prominent potential in flexible displays.
Article
Chemistry, Physical
Avik Das, Tushar Debnath
Summary: Controlling light reabsorption in emitting materials is crucial for improving the performance of light-emitting devices. In this study, we prepared a series of size-dependent Cs(Mn/Pb)Cl-3 alloy nanoplatelets with a significant enhancement in the exciton Stokes shift. By utilizing an interfacial Mn-alloying process, we achieved a large exciton Stokes shift of 600 meV in 2 ML Cs(Mn/Pb)Cl-3 NPls. We also proposed a model based on the charge transfer process between Mn2+ and Mn3+ to explain the observed phenomenon.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Yu-Jung Lu, Teng Lam Shen, Kang-Ning Peng, Pi-Ju Cheng, Shu-Wei Chang, Ming-Yen Lu, Chih Wei Chu, Tzung-Fang Guo, Harry A. Atwater
Summary: The study demonstrates the improvement of upconversion efficiency and reduction of lasing threshold using single-mode upconversion lasing in a plasmonic nanocavity. This breakthrough in nanolaser technology has significant implications for various applications in photonics and nanotechnology.
Article
Chemistry, Multidisciplinary
Muhammad Sulaman, Shengyi Yang, Arfan Bukhtiar, Peiyun Tang, Zhenheng Zhang, Yong Song, Ali Imran, Yurong Jiang, Yanyan Cui, Libin Tang, Bingsuo Zou
Summary: This study focuses on the fabrication of high-performance photodetectors by integrating PbSe CQDs with inorganic mixed-halide perovskite NCs. The combination of these materials improves the transportation of photogenerated carriers and results in excellent photoresponsivity and detectivity. Numerical simulations and discussions on the physical mechanisms of carrier transportation were conducted.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
N. S. M. Viswanath, Mu-Huai Fang, Ha Tran Huu, Joo Hyeong Han, Ru-Shi Liu, Won Bin Im
Summary: This study demonstrates the tuning of thermal stability from negative thermal quenching to zero thermal quenching while preserving the original emission efficiency by introducing Lu3+ ions in Na3Sc2(PO4)(3):Eu2+. By utilizing optimized Lu3+-doped Na3Sc2(PO4)3:Eu2+ as the blue component, a high-power white light-emitting diode with high color-rendering index and luminous efficiency values was successfully fabricated. These findings emphasize the importance of structure-property relationships in designing thermally stable phosphors for high-power lighting applications.
CHEMISTRY OF MATERIALS
(2022)
Article
Energy & Fuels
Ha Tran Huu, Hang T. T. Le, Thanh Huong Nguyen, Lan Nguyen Thi, Vien Vo, Won Bin Im
Summary: In this study, SnS2 nanosheets were synthesized and grafted onto porous g-C3N4 as an anode active material for sodium-ion batteries. The composites showed outstanding performance in terms of high capacity and ultralong cycling stability, attributed to the presence of g-C3N4 relieving strains induced by volume variation of SnS2 and enhanced transport of electrons and sodium ions.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Nanoscience & Nanotechnology
Muthulakshmi Vaikundam, Swetha Shanmugam, S. Aldawood, Paulraj Arunkumar, Amutha Santhanam
Summary: The synthesis of pectin-mediated HAP nanoparticles and HAP/pectin nanocomposites using carrot pomace pectin as a template was the focus of this study. The results showed that the nanoparticles produced at the optimal pectin concentration were pure, spherical, low crystalline, and discrete particles with reduced size, and had antimicrobial properties. In comparison to pectin-mediated hydroxyapatite, the HAP/pectin nanocomposites exhibited higher cell survival and bone mineralization, indicating their potential for biomedical applications.
APPLIED NANOSCIENCE
(2022)
Article
Environmental Sciences
Balakrishnan Muthukumar, Saravanan Surya, Krithiga Sivakumar, Mohamad S. AlSalhi, Tentu Nageswara Rao, Sandhanasamy Devanesan, Paulraj Arunkumar, Aruliah Rajasekar
Summary: This study conducted bioaugmentation of crude oil/motor oil contaminated soil using a mixture of novel strains Pseudomonas aeruginosa PP3 and Pseudomonas aeruginosa PP4. Four different bioaugmentation systems were implemented, and the effectiveness was monitored by investigating the total petroleum hydrocarbon (TPH) removal rate. The results showed that BS 4 (BS 3 + bacterial consortia) had the highest TPH removal rate of 67%, followed by BS 2 (BS 1 + bacterial consortia) with a removal rate of 52%. GCMS analysis revealed that BS 2 and BS 4 achieved 65% and 83% biodegradation efficiency (BE) of residual crude and motor oil contaminated soil, respectively. Plant cultivation experiments demonstrated that Lablab purpureus grew more rapidly in BS 2 and BS 4 systems compared to BS 1 and BS 2, indicating the suitability of the bioaugmented soil for plant growth.
Article
Chemistry, Multidisciplinary
Changhee Jang, Kangyong Kim, Hak-Won Nho, Seung Min Lee, Hanif Mubarok, Joo Hyeong Han, Hyeonjung Kim, Dongryeol Lee, Yangpil Jang, Min Hyung Lee, Oh-Hoon Kwon, Sang Kyu Kwak, Won Bin Im, Myoung Hoon Song, Jongnam Park
Summary: This article presents an optimized colloidal process for synthesizing uniform Cs5Cu3Cl6I2 nanocrystals with a superior quantum yield. Precise control of the synthesis parameters enables anisotropic growth and emission wavelength shifting. The synthesized nanocrystals exhibit excellent photoluminescence retention rate at high temperature and high stability under ambient conditions. Moreover, they demonstrate three-photon absorption-induced photoluminescence, indicating their potential for nonlinear optical applications. These thermally stable and highly luminescent nanocrystals overcome the limitations of conventional blue-emitting nanomaterials and provide insights into their colloidal synthesis mechanism.
Article
Materials Science, Multidisciplinary
Jinju Lee, Hansol Lee, Usik Kim, Woon Jin Chung, Won Bin Im
Summary: A remote color converter was fabricated using CsPbBr3 perovskite nanocrystal embedded glass (PNEG) as a green phosphor in a silicone (PiS) structure. The PNEG, when pasted on a glass substrate and mounted on a blue LED, exhibited enhanced thermal and photo stability compared to bulk PNEG. A white LED with a wide color gamut of up to 130% of the NTSC defined area was prepared using the remote color converter and K2SiF6:Mn4+ (KSF:Mn4+) as a red phosphor. The feasibility of a flexible remote white color converter using ultra-thin glass (UTG) as a substrate was also examined and discussed.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Physical
Joo Hyeong Han, Tuhin Samanta, Yong Min Park, Ha Jun Kim, Noolu Srinivasa Manikanta Viswanath, Hyeon Woo Kim, Bo Kyung Cha, Sung Beom Cho, Won Bin Im
Summary: We developed zero-dimensional lead-free monoclinic phases of Cs3TbCl6 and Rb3TbCl6 metal halides that are thermally and chemically stable. These materials exhibit high light yields and low detection limits, making them suitable for radiation detection in extreme environments. Thin films of Cs3TbCl6 and Rb3TbCl6 also show improved spatial resolutions compared to a commercial Gd2O2S:Tb3+ film in our X-ray imaging system.
ACS ENERGY LETTERS
(2023)
Article
Engineering, Chemical
Kyung Won Min, Jae Ho Choi, YoonSung Jung, Young Min Byun, Won Bin Im, Hyeong-Jun Kim
Summary: This study investigated the effects of heat-treatment temperature and hot-end coating on the mechanical properties and reliability of lightweight glass bottles. Chemical strengthening at the glass transformation temperature significantly improved the hardness and impact strength of the bottles. The use of hot-end coating reduced the distribution of impact strength and increased the Weibull modulus values, enhancing the reliability of the bottles after chemical strengthening.
Article
Nanoscience & Nanotechnology
Han Bin Cho, Ju Yeon Han, Ha Jun Kim, Noolu Srinivasa Manikanta Viswanath, Yong Min Park, Jeong Wan Min, Sung Woo Jang, Heesun Yang, Won Bin Im
Summary: Quantum dot light-emitting diodes (QLEDs) are promising for display applications. Polyethylenedioxythiophene:polystyrene sulfonate (PEDOT:PSS) is commonly used as a hole injection layer (HIL) material due to its high conductivity and work function. However, PEDOT:PSS-based QLEDs have a high energy barrier for hole injection, resulting in low device efficiency. Here, we demonstrate a bilayer-HIL using VO2 and a PEDOT:PSS-based QLED, which shows an 18% external quantum efficiency (EQE), 78 cd/A current efficiency (CE), and 25,771 cd/m(2) maximum luminance. This is compared to the PEDOT:PSS-based QLED with an EQE of 13%, CE of 54 cd/A, and maximum luminance of 14,817 cd/m(2). The increase in EQE is attributed to the reduction in the energy barrier between indium tin oxide (ITO) and PEDOT:PSS by the insertion of a VO(2) HIL. Therefore, our results demonstrate the effectiveness of a bilayer-HIL in increasing the EQE in QLEDs.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Tuhin Samanta, Noolu Srinivasa Manikanta Viswanath, Sung Woo Jang, Jeong Wan Min, Han Bin Cho, Joo Hyeong Han, Won Bin Im
Summary: Researchers report zero-dimensional Cs3ScCl6:Sb3+(CSC:Sb3+) nanocrystals that exhibit bright white-light emission, achieved through the combination of blue and yellow emissions of carbon dots and spin-forbidden electronic transitions of Sb3+ ions. These nanocrystals have a high photoluminescence quantum yield and high thermal stability, and can be used to fabricate single-component white-light-emitting diodes.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Joo Hyeong Han, Tuhin Samanta, Han Bin Cho, Sung Woo Jang, N. S. M. Viswanath, Yu Ri Kim, Jeong Min Seo, Won Bin Im
Summary: This study presents a new Cs3GdCl6 0D metal halide material that shows high hydrochromic upconversion luminescence (UCL) in the form of polycrystals and nanocrystals. The hydrochromic UCL color change from green to red is achieved through co-doping Yb3+ and Er3+ in polycrystals. The water-sensing probe based on this material exhibits excellent repeatability and is suitable for real-time and long-term water monitoring. Moreover, the hydrochromic UCL property is also utilized for stimuli-responsive information encryption.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Hyeon Woo Kim, Joo Hyeong Han, Hyunseok Ko, Tuhin Samanta, Dong Geon Lee, Dong Won Jeon, Woongchan Kim, Yong-Chae Chung, Won Bin Im, Sung Beom Cho
Summary: Exploring the vast and veiled chemical spaces through synthesis is crucial in solid-state materials. This study focuses on navigating metal halides, particularly the coexistence of perovskites and their derivatives, which has restricted their exploration. By combining high-throughput density functional theory calculations and machine learning, the researchers systematically explore inorganic halide perovskite derivatives, charting the chemical spaces and predicting their electrical properties and thermal stability. The successful synthesis of new Cs3LuCl6 and its application in white-light-emitting diodes showcase the potential practical applications of inorganic metal halides.
ACS ENERGY LETTERS
(2023)
Review
Engineering, Electrical & Electronic
Han Bin Cho, Jeong Wan Min, Ha Jun Kim, Noolu Srinivasa Manikanta Viswanath, Tuhin Samanta, Joo Hyeong Han, Yong Min Park, Sung Woo Jang, Won Bin Im
Summary: Zero-dimensional (0D) perovskites have attracted significant attention in optoelectronic applications due to their unique structure and optical properties. This review discusses the synthesis methods and phase stability issues of three-dimensional embedded in zero-dimensional (3D-0D) lead halide perovskites, as well as their various applications in optoelectronic devices. Future research directions are also suggested based on their potential applications.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Chemistry, Physical
Zhongkai Yu, Woo Hyeon Jeong, Keehoon Kang, Hochan Song, Xinyu Shen, Hyungju Ahn, Seok Woo Lee, Xiangyang Fan, Ji Won Jang, Su Ryong Ha, Jeong Wan Min, Jong Hyun Park, Jongmin Han, Eui Dae Jung, Myoung Hoon Song, Dong Wook Chang, Won Bin Im, Sung Heum Park, Hyosung Choi, Bo Ram Lee
Summary: Metal halide based perovskite light-emitting diodes (PeLEDs) show great promise for future commercial display products, but the performance of blue PeLEDs falls short of commercial requirements. This study developed a polymer/small-molecule binary-blend hole transport layer (HTL) to address the charge balance issue and achieve efficient light emission.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Physical
Shibnath Samanta, Gopinathan Anoop, WooJun Seol, Seong Min Park, HyunJin Joh, Je Oh Choi, Dante Ahn, Sanjith Unithrattil, Hoon Kim, Jiwon Yeom, Seungbum Hong, Ji Young Jo
Summary: In this study, the performance and reliability of solution-processed Y:HfO2 thin films in electrocaloric effect (ECE) were investigated. The results showed that the Y:HfO2 thin films exhibited a large and reliable ECE response, making them suitable for on-chip microelectronic cooling devices.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)