Article
Green & Sustainable Science & Technology
Rohith Kumar Raman, Senthil A. Gurusamy Thangavelu, Selvaraj Venkataraj, Ananthanarayanan Krishnamoorthy
Summary: Perovskite solar cells have shown significant advancements in power conversion efficiency, but the poor lifetime and stability remain major challenges that need to be addressed. Developing new stable perovskite materials and optimizing device architecture are important, however, using robust barrier encapsulation with high barrier performance materials is crucial in overcoming these challenges.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Optics
Jiang Guo, Sichun Li, Jiayun Kong, Yuxin Li, Li Zhou, Liyang Lou, Qiuyi Lv, Rong Tang, Lingling Zheng, Bin Deng, Ruijin Yu
Summary: A new yellow-emitting phosphor, NaCaTiTaO6:Dy3+, with a stable double perovskite structure, was successfully synthesized via solid-phase synthesis. The phosphor showed a particle size of approximately 3.8 μm and exhibited a maximum emission peak at 574 nm under irradiation at 389 nm. The Dy3+ doping concentration was optimized and the phosphor demonstrated high thermal stability. Its excellent luminescence properties make it suitable for application in white-light emitting diodes (w-LEDs).
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Cheng Yan, Chao Luo, Wen Li, Xiaodong Peng, Jingjing Cao, Xiankan Zeng, Yue Gao, Xuehai Fu, Xiang Chu, Wen Deng, Fengjun Chun, Shiyu Yang, Qungui Wang, Weiqing Yang
Summary: By employing an ultrafast thermodynamics-induced injection enhancement strategy, this study successfully promotes efficient carrier recombination within PeLEDs, improving their thermal performance and spectral stability, achieving more stable deep-blue PeLEDs.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Review
Chemistry, Physical
Dongchen Lan, Martin A. Green
Summary: Although lead-halide perovskite solar cells have high energy conversion efficiencies, their limited stability and challenges under reverse-bias operation hinder commercialization. Innovative approaches are needed to address these challenges and increase stability.
Article
Chemistry, Physical
Shengfan Wu, Ming Liu, Alex K. -Y. Jen
Summary: Over the past decade, the efficiency of single-junction perovskite solar cells has significantly improved, approaching their limit. Constructing tandem solar cells is a promising route to achieve higher efficiency by effectively utilizing solar energy. Perovskite-organic tandem cells are particularly interesting due to the complementary properties of organic solar cells and PSCs, and have the potential to outperform existing tandem cells.
Article
Materials Science, Ceramics
Li Zhou, Haoran Su, Changlin Li, Ruiqi Yang, Yufan Shang, Chaoyue Wang, Jingjing Lian, Shouan Xie, Xiaohui Ji, Ruijin Yu
Summary: This research synthesized a series of NaGdMg-TeO6:xSm3+ phosphors with a double perovskite structure using solid-state reaction methods. The crystal structure, phase purity, photoluminescence properties, concentration quenching mechanism, color purity, thermal stability, and inner quantum efficiency of the samples were systematically studied. The NaGdMgTeO6:Sm3+ phosphors exhibited strong red emission at 648 nm under 405 nm excitation, with the optimal luminescence intensity achieved at a dopant concentration of 1 mol%. The phosphors showed high color purity, thermal stability, and activation energy. The fabricated red LED showed superior spectral matching with Phytochrome Pr, and the w-LED had a high color rendering index and a suitable correlated color temperature. These phosphors have potential applications in plant growth LEDs and w-LEDs.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
C-H. Angus Li, Pui Kei Ko, Christopher C. S. Chan, Aleksandr Sergeev, Dezhang Chen, Neha Tewari, Kam Sing Wong, Jonathan E. Halpert
Summary: Producing efficient blue and deep blue perovskite LEDs (PeLEDs) is still a challenge in optoelectronics due to problems with color, luminance, and stability. This study proposes a solution by mixing DJ phase precursors into RP phase perovskites, which suppresses unwanted phases and allows for blue shifting. By optimizing the concentration and layers, a stable deep blue PeLED with an external quantum efficiency of 1.5% at 469 nm is achieved.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Fabian Paulus, Colin Tyznik, Oana D. Jurchescu, Yana Vaynzof
Summary: This review discusses the current status of field-effect transistors, the success of metal halide perovskite materials in photovoltaics, and the exploration of their application in other optoelectronic devices. It also highlights the challenges and provides an outlook for the future perspectives of perovskite FETs. The role of ion migration, defects, temperature, light, and measurement conditions in influencing these devices is examined, along with a survey and critical assessment of the performance of perovskite transistors and phototransistors.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Review
Optics
Kai Zhang, Long-Xue Cao, Yingyi Tang, Yi Yu, Yang Shen, Bingfeng Wang, Wen-Jun Wang, Yan-Qing Li, Jian-Xin Tang
Summary: This review focuses on the key factors and strategies for blue emission PeLEDs, including effective methods for obtaining blue emission and significant improvements based on different structural materials. Challenges in efficiency, stability, lead toxicity, and fabrication techniques are summarized, and future research directions are discussed.
LASER & PHOTONICS REVIEWS
(2023)
Review
Energy & Fuels
Shuyan Chen, Na Liu, Fan Xu, Guodan Wei
Summary: This review comprehensively presents and discusses the research status, main challenges, and possible strategies to overcome the instability issues in perovskite solar cells (PSCs) from four main perspectives: perovskite, charge transport materials, electrodes, and encapsulations. The review also summarizes related testing standards and scalable fabrications to provide essential guidance toward future stable perovskite photovoltaics.
Article
Nanoscience & Nanotechnology
Xinshun Qin, Yanling He, Chun Ki Tao, Aleksandr Sergeev, Kam Sing Wong, Zhilin Ren, Qiong Liang, Tik Lun Leung, Gang Li, Jasminka Popovic, Alan Man Ching Ng, Aleksandra B. Djurisic
Summary: We investigated the influence of two passivating molecules containing a P=O group on the performance of quasi-2D Dion-Jacobson halide perovskite light-emitting diodes. Our findings showed that both passivating molecules led to increased efficiency compared to control devices, with TPPO decreasing the device lifetime while TSPO1 increased it. The differences in energy-level alignment, electron injection, film morphology, crystallinity, and ion migration during operation accounted for the varying effects of the two molecules.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Review
Energy & Fuels
Luisa De Marco, Giuseppe Nasti, Antonio Abate, Aurora Rizzo
Summary: The power conversion efficiency of metal-halide perovskite solar cells has greatly increased, suggesting its potential for large-scale industrial applications. Perovskite single crystals have better electrical properties compared to polycrystalline materials, but their integration into complete devices requires special attention and growth techniques. This review summarizes recent advances in single-crystal halide perovskites, including crystalline structure, growth methods, and device design.
Article
Chemistry, Multidisciplinary
J. Hu, X. Xiong, W. Guan, Z. Xiao, C. Tan, H. Long
Summary: All-inorganic cesium-based perovskites have gained significant attention in the field of perovskite photovoltaic devices due to their superior environmental stability and efficiency. This review article provides a comprehensive discussion on the materials, structure, preparation techniques, and kinetics of all-inorganic perovskites. The advantages and shortcomings of different strategies presented in recent publications are also analyzed, and future research directions and commercial applications are highlighted.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Yanqiao Xu, Xiaobo Hu, Huidong Tang, Qing Hu, Sanhai Wang, Ting Chen, Xiaojun Zhang, Weihui Jiang, Lianjun Wang, Wan Jiang
Summary: In order to address the issue of poor structural stability of lead halide perovskite nanocrystals (NCs), a novel strategy for synthesizing stable CsPbBr3@SiO2 NCs is designed. The method utilizes the hydrolytic polycondensation of (3-aminopropyl)triethoxysilane (APTES) in the presence of ionic liquids (ILs). This approach effectively resolves the problems of fluorescence quenching and undesirable agglomeration, resulting in CsPbBr3@SiO2 NCs with high photoluminescence quantum yield and excellent stability.
Article
Multidisciplinary Sciences
Yasser Hassan, Jong Hyun Park, Michael L. Crawford, Aditya Sadhanala, Jeongjae Lee, James C. Sadighian, Edoardo Mosconi, Ravichandran Shivanna, Eros Radicchi, Mingyu Jeong, Changduk Yang, Hyosung Choi, Sung Heum Park, Myoung Hoon Song, Filippo De Angelis, Cathy Y. Wong, Richard H. Friend, Bo Ram Lee, Henry J. Snaith
Summary: By utilizing multidentate ligands to treat mixed-halide perovskite nanocrystals, efficient and color-stable red electroluminescence with a wavelength centered at 620 nanometers and an external quantum efficiency of 20.3% has been achieved. The key function of the ligand treatment is to 'clean' the nanocrystal surface by removing lead atoms, which suppresses the formation of iodine Frenkel defects and halide segregation. This work demonstrates the sensitivity of metal halide perovskites to surface properties and provides a pathway to control surface defect formation and migration, crucial for achieving bandgap stability for light emission and potentially impacting other optoelectronic applications.
Review
Nanoscience & Nanotechnology
Kwan-Nyeong Kim, Min-Jun Sung, Hea-Lim Park, Tae-Woo Lee
Summary: This paper introduces the role and requirements of organic synaptic transistors (OSTs) in bio-hybrid neuromorphic applications.
ADVANCED ELECTRONIC MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Hyungseok Kang, Joo Sung Kim, Seok-Ryul Choi, Young-Hoon Kim, Do Hwan Kim, Jung-Gu Kim, Tae-Woo Lee, Jeong Ho Cho
Summary: This study focuses on modifying the work function and conductivity of metal silver nanowire (AgNW) networks used as the anode electrode in organic light-emitting diodes (OLEDs) through a low-cost and facile electroplating method. The electroplating process successfully deposited four different metals onto the AgNWs, resulting in metal nanowires with varying characteristics. This method holds promise for the fabrication of next-generation OLEDs.
Article
Chemistry, Physical
SungWon Cho, Padmini Pandey, Jinwoo Park, Tae-Woo Lee, Dong-Won Kang
Summary: Morphology optimization of the electron transport layer (ETL) in perovskite solar cells (PSCs) through solvent engineering using a mixed solvent system has been shown to improve device efficiency by enhancing the interaction at the perovskite/ETL interface, leading to efficient charge transfer and reduced carrier recombination. The power conversion efficiency (PCE) in PSCs has been increased from 17.2% to 18.46% with the introduction of a mixed solvent system for ETL, demonstrating the potential of this approach for high-performance PSCs.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Yoonsang Park, Minh Dao Tran, Yujin Kim, Sungyeon Won, Young-Hoon Kim, Tae-Woo Lee, Tom Gregorkiewicz, Young Hee Lee, Ji-Hee Kim, Woosung Kwon
Summary: This study reports the existence of near-infrared emissive states in carbon dots, originating from the graphitic cores, which behave differently from their visible emissive states. The emission mechanism is elucidated, suggesting that small graphitic subregions in CDs produce the NIR emissive states, which are rarely affected by surface chemistry changes.
Article
Nanoscience & Nanotechnology
Young-Hoon Kim, Jinwoo Park, Sungjin Kim, Joo Sung Kim, Hengxing Xu, Su-Hun Jeong, Bin Hu, Tae-Woo Lee
Summary: In this study, highly efficient large-area PeLEDs with high uniformity were achieved through the use of colloidal perovskite nanocrystals. The precrystallized PNCs were not affected by the film formation process and a modified bar-coating method facilitated the formation of uniform large-area films. This method shows promise for the development of large-scale industrial displays and solid-state lighting.
NATURE NANOTECHNOLOGY
(2022)
Article
Engineering, Biomedical
Yeongjun Lee, Yuxin Liu, Dae-Gyo Seo, Jin Young Oh, Yeongin Kim, Jinxing Li, Jiheong Kang, Jaemin Kim, Jaewan Mun, Amir M. Foudeh, Zhenan Bao, Tae-Woo Lee
Summary: By relaying neural signals, devices for neurorehabilitation can enhance the movement of limbs with damaged nerves. A stretchable neuromorphic implant is reported here, which restores coordinated and smooth motions in mice with neurological motor disorders, enabling activities such as kicking a ball, walking, and running. The implant generates electrophysiological signals and provides proprioceptive feedback, operating at low power and potentially inspiring the development of advanced neuromorphic devices.
NATURE BIOMEDICAL ENGINEERING
(2023)
Review
Chemistry, Multidisciplinary
Joo Yoon Woo, Min-Ho Park, Su-Hun Jeong, Young-Hoon Kim, Byungjae Kim, Tae-Woo Lee, Tae-Hee Han
Summary: This review summarizes the challenges and progress in the development of solution-processed organic light-emitting diodes (SOLEDs) in both industry and academia. Solution processing offers advantages like material efficiency, low-cost production, and scalability. However, there are complications related to solvent resistance and suitable solution-processable materials, ultimately leading to less efficient and shorter-lived SOLEDs compared to those fabricated by thermal evaporation. This review highlights the current status of SOLED development and presents research guidelines to overcome these limitations and achieve efficient, long-lasting, and commercially-viable SOLEDs.
ADVANCED MATERIALS
(2023)
Correction
Engineering, Biomedical
Yeongjun Lee, Yuxin Liu, Dae-Gyo Seo, Jin Young Oh, Yeongin Kim, Jinxing Li, Jiheong Kang, Jaemin Kim, Jaewan Mun, Amir M. Foudeh, Zhenan Bao, Tae-Woo Lee
NATURE BIOMEDICAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Shin Jung Han, Huanyu Zhou, Hyeokjun Kwon, Seung-Je Woo, Tae-Woo Lee
Summary: A solvent-vapor-assisted lamination method is used to lower the operating voltage and increase the stretchability of intrinsically-stretchable organic light-emitting diodes (ISOLEDs). This method achieves a uniform contact and strong adhesion at the cathode interface, reducing the threshold voltage and maintaining excellent mechanical stretchability. This study has practical implications for the development of intrinsically-stretchable optoelectronic devices.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Jae Il Kim, Qingsen Zeng, Sunghee Park, Hyejin Lee, Jinwoo Park, Taejun Kim, Tae-Woo Lee
Summary: Metal halide perovskite nanocrystals (PeNCs) possess excellent luminescent properties suitable for high color purity and high absorption coefficient displays. However, their vulnerability to heat, light, and moisture hinders their commercialization. This review explores strategies to enhance the stability of PeNCs and summarizes their applications in downconversion displays and near-eye augmented reality/virtual reality devices.
ADVANCED MATERIALS
(2023)
Article
Multidisciplinary Sciences
Joo Sung Kim, Jung-Min Heo, Gyeong-Su Park, Seung-Je Woo, Changsoon Cho, Hyung Joong Yun, Dong-Hyeok Kim, Jinwoo Park, Seung-Chul Lee, Sang-Hwan Park, Eojin Yoon, Neil C. Greenham, Tae-Woo Lee
Summary: This study reports the development of ultra-bright, efficient, and stable light-emitting diodes (PeLEDs) made of core/shell perovskite nanocrystals. The nanocrystals, obtained through in situ reaction of benzylphosphonic acid with polycrystalline perovskite films, demonstrate strong carrier confinement and maintain good charge-transport properties.
Review
Materials Science, Multidisciplinary
Yeongjun Lee, Hyeon Cho, Hyungsoo Yoon, Hyunbum Kang, Hyunjun Yoo, Huanyu Zhou, Sujin Jeong, Gae Hwang Lee, Geonhee Kim, Gyeong-Tak Go, Jiseok Seo, Tae-Woo Lee, Yongtaek Hong, Youngjun Yun
Summary: A stretchable display is the future form of display, surpassing curved and foldable configurations, for deformable electronic applications. However, developing strategies for achieving mechanical stretchability without compromising electrical properties is necessary due to the brittleness of conventional active devices. This review covers recent developments in advanced materials and strategies for realizing stretchable electronic devices, as well as discussing future perspectives and challenges.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Review
Materials Science, Multidisciplinary
Sun Jae Park, Changmin Keum, Huanyu Zhou, Tae-Woo Lee, Wonhee Choe, Himchan Cho
Summary: Augmented reality (AR) and virtual reality (VR) are emerging interactive technologies that provide a new digital interactive experience in daily life. Nanoscale light emitters such as quantum dots (QDs) and metal halide perovskites (MHPs) have attracted attention for their potential use in AR/VR displays. However, challenges such as material stability and high-resolution patterning hinder the development of high-resolution AR/VR displays.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Review
Chemistry, Multidisciplinary
Yifei Luo, Mohammad Reza Abidian, Jong-Hyun Ahn, Deji Akinwande, Anne M. Andrews, Markus Antonietti, Zhenan Bao, Magnus Berggren, Christopher A. Berkey, Christopher John Bettinger, Jun Chen, Peng Chen, Wenlong Cheng, Xu Cheng, Seon-Jin Choi, Alex Chortos, Canan Dagdeviren, Reinhold H. Dauskardt, Chong-an Di, Michael D. Dickey, Xiangfeng Duan, Antonio Facchetti, Zhiyong Fan, Yin Fang, Jianyou Feng, Xue Feng, Huajian Gao, Wei Gao, Xiwen Gong, Chuan Fei Guo, Xiaojun Guo, Martin C. Hartel, Zihan He, John S. Ho, Youfan Hu, Qiyao Huang, Yu Huang, Fengwei Huo, Muhammad M. Hussain, Ali Javey, Unyong Jeong, Chen Jiang, Xingyu Jiang, Jiheong Kang, Daniil Karnaushenko, Ali Khademhosseini, Dae-Hyeong Kim, Il-Doo Kim, Dmitry Kireev, Lingxuan Kong, Chengkuo Lee, Nae-Eung Lee, Pooi See Lee, Tae-Woo Lee, Fengyu Li, Jinxing Li, Cuiyuan Liang, Chwee Teck Lim, Yuanjing Lin, Darren J. Lipomi, Jia Liu, Kai Liu, Nan Liu, Ren Liu, Yuxin Liu, Yuxuan Liu, Zhiyuan Liu, Zhuangjian Liu, Xian Jun Loh, Nanshu Lu, Zhisheng Lv, Shlomo Magdassi, George G. Malliaras, Naoji Matsuhisa, Arokia Nathan, Simiao Niu, Jieming Pan, Changhyun Pang, Qibing Pei, Huisheng Peng, Dianpeng Qi, Huaying Ren, John A. Rogers, Aaron Rowe, Oliver G. Schmidt, Tsuyoshi Sekitani, Dae-Gyo Seo, Guozhen Shen, Xing Sheng, Qiongfeng Shi, Takao Someya, Yanlin Song, Eleni Stavrinidou, Meng Su, Xuemei Sun, Kuniharu Takei, Xiao-Ming Tao, Benjamin C. K. Tee, Aaron Voon-Yew Thean, Tran Quang Trung, Changjin Wan, Huiliang Wang, Joseph Wang, Ming Wang, Sihong Wang, Ting Wang, Zhong Lin Wang, Paul S. Weiss, Hanqi Wen, Sheng Xu, Tailin Xu, Hongping Yan, Xuzhou Yan, Hui Yang, Le Yang, Shuaijian Yang, Lan Yin, Cunjiang Yu, Guihua Yu, Jing Yu, Shu-Hong Yu, Xinge Yu, Evgeny Zamburg, Haixia Zhang, Xiangyu Zhang, Xiaosheng Zhang, Xueji Zhang, Yihui Zhang, Yu Zhang, Siyuan Zhao, Xuanhe Zhao, Yuanjin Zheng, Yu-Qing Zheng, Zijian Zheng, Tao Zhou, Bowen Zhu, Ming Zhu, Rong Zhu, Yangzhi Zhu, Yong Zhu, Guijin Zou, Xiaodong Chen
Summary: Humans are increasingly relying on flexible sensors to address challenges and improve quality of life in the digital and big data era. However, the market adoption of flexible sensors is still limited despite advancements in research. In this paper, we identify the bottlenecks hindering the maturation of flexible sensors and propose potential solutions to expedite their deployment and commercialization.
Article
Chemistry, Physical
Dawoon Jang, Suyeon Lee, Nam Hee Kwon, Taehoon Kim, Sangjoon Park, Kyung Yeon Jang, Eojin Yoon, Seungjoo Choi, Juheon Han, Tae-Woo Lee, Jeongho Kim, Seong-Ju Hwang, Sungjin Park
Summary: In this work, one-dimensional P-doped carbon nitride nanotubes have been successfully synthesized using supramolecular self-assembly. These nanotubes exhibit great potential as an eco-friendly, visible-light-active photocatalyst for hydrogen evolution reaction. The addition of an ionic liquid improves the uniformity of the nanotubes. Thorough structural and photophysical characterizations reveal that the nanotubes possess larger surface areas, more amine bridges, better crystallinity, and higher visible-light-absorption ability, which contribute to their enhanced photocatalytic performance.
