Article
Chemistry, Physical
Lai-Peng Ma, Zhongbin Wu, Yukun Yan, Dingdong Zhang, Shichao Dong, Jinhong Du, Dongge Ma, Hui-Ming Cheng, Wencai Ren
Summary: This study successfully fabricates high-performance graphene FTEs for efficient flexible OLEDs by combining frustrated Lewis pair doping and nanostructure engineering. By depositing a p-type dopant on graphene electrode, both the light-extraction efficiency and charge injection efficiency are improved.
Article
Chemistry, Analytical
Hsin-Yi Wen, Yu-Shien Lu, Cheng-Yan Guo, Mei-Ying Chang, Wen-Yao Huang, Tung-Li Hsieh
Summary: The structure of the device used in this study is substrate/PMMA/ZnS/Ag/MoO3/NPB/Alq3/LiF/Al. The microstructure of the P4 substrate was found to enhance the device brightness. Analysis of AFM surface morphology, film resistance, and optical simulation results revealed that the microholes on the P4 substrate significantly contributed to the device performance. The reproducibility of the naturally formed holes was confirmed by fabricating devices with different emitting layer thicknesses.
Review
Chemistry, Physical
Jun-Kyul Song, Min Sung Kim, Seungwon Yoo, Ja Hoon Koo, Dae-Hyeong Kim
Summary: Efforts have been made to overcome the limitations of conventional rigid optoelectronic devices by using functional nanomaterials and organic materials for mechanical deformability. Advanced device designs and unconventional fabrication methods have contributed to the development of soft optoelectronic devices, leading to the creation of new devices. The focus is on developing deformable photodetectors and light-emitting diodes, with a discussion on system-level applications and future prospects.
Article
Nanoscience & Nanotechnology
Claire Arneson, Xinjing Huang, Stephen R. Forrest
Summary: This study demonstrates a method for achieving tunable white light through the side-by-side positioning of monochromatic blue and yellow phosphorescent OLED stripes using a high-resolution mechanical peel-off patterning method. The results show a peak luminous power efficiency of 17.1 lm W-1 and an external quantum efficiency of 11.8%, as well as the ability to adjust the color temperature and color rendering index of the light source. The peel-off technique used in this method ensures a comparable device lifetime to conventionally patterned devices.
Review
Chemistry, Multidisciplinary
Peng Xiao, Yicong Yu, Junyang Cheng, Yonglong Chen, Shengjin Yuan, Jianwen Chen, Jian Yuan, Baiquan Liu
Summary: This review comprehensively summarizes state-of-the-art concepts to improve the lifetime of perovskite light-emitting diodes (PeLEDs), covering aspects such as perovskite emitting material design, device engineering innovation, optical effects manipulation, and advanced encapsulations. Strategies to enhance the lifetime of both organic-inorganic hybrid and all-inorganic PeLEDs are highlighted, with a particular focus on managing optical effects and encapsulations. Challenges and opportunities to further enhance the lifetime of PeLEDs are also introduced.
Article
Materials Science, Multidisciplinary
Kevin Sutanto, Nurul Ridho Al Amin, Chih-Hsin Chen, Dian Luo, Chien-Hsin Chen, Sajal Biring, Chih-Chien Lee, Shun-Wei Liu
Summary: Recently, vacuum deposited multilayered electrodes with ultra-smooth surface morphology and suitable work function have received increasing attention for their ability to efficiently inject electrons or holes at the interface between organic and metal layers. In this study, a simplified structure of WO3/Al/Al:Ag anode was fabricated, achieving high external quantum efficiency and large active area for red OLEDs.
ORGANIC ELECTRONICS
(2022)
Article
Chemistry, Multidisciplinary
Dowan Kim, Hyung-Jun Park, Seo-Hee Jung, Won Jun Pyo, Syed Zahid Hassan, Hye Ryun Sim, Jeong-Hwan Lee, Dong-Woo Jee, Dae Sung Chung
Summary: A multichannel/multicolor visible light communication (VLC) system using entirely organic components is developed to demonstrate indoor lighting applications. The system utilizes tricolor (R/G/B)-selective organic photodetector arrays as receivers and tricolor organic light-emitting diode arrays as emitters. The study examines the effect of emission angle-dependent wavelength shift and luminosity function on the performance of the VLC system.
ADVANCED MATERIALS
(2023)
Article
Spectroscopy
Hui Du, Yangyang Guo, Dongyue Cui, Shuhong Li, Wenjun Wang, Yunlong Liu, Yicun Yao, Ling Zhao, Xiaochen Dong
Summary: This study proposed a simple yet effective method to fabricate flexible electrodes with optical transparency and sheet resistance comparable to ITO. OLEDs based on these composite electrodes showed superior performance compared to OLEDs with ITO anode due to lower sheet resistance and smoother surface, as well as the Far SPR effect.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Optics
Mehdi Zarei, James c. Loy, Mingxuan Li, Ziyu Zhou, Sneh Sinha, Melbs Lemieux, S. brett Walker, Barry p. Rand, Paul w. Leu
Summary: Organic light-emitting diodes (OLEDs) have great potential for large-area applications, but their adoption is hindered by the high cost and insufficient performance of indium tin oxide (ITO) anodes. In this study, a silver mesh embedded in glass is introduced as an alternative anode material, enabling the production of large-area OLEDs. The high aspect ratio micromeshes embedded in glass provide the desired planar geometry for OLED layers. The phosphorescent green OLEDs achieve high current efficiency and slightly higher external quantum efficiency compared to standard ITO/glass samples, without impacting the viewing angle.
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
Materials Science, Multidisciplinary
Zhenxiao Wang, Miaomiao Wang, Bo Jiao, Wenxuan Lu, Defei Xu, Linquan Huang, Xun Hou, Zhaoxin Wu
Summary: In this study, an RM-based flexible transparent conductive electrode (FTCE) using a thermally transferred PEDOT: PSS as a modification layer was reported. The transferred PEDOT:PSS modified RM exhibited low sheet resistance and high transmittance with a smooth surface. Furthermore, the modified RM showed improved mechanical robustness, making it more applicable in flexible OLEDs.
ORGANIC ELECTRONICS
(2022)
Article
Materials Science, Multidisciplinary
Gyu Jin Choi, Jeong Won Ryu, Ji-Young Jeong, Tae-Jin Je, Dong Ki Yoon, Jin Seog Gwag
Summary: The study shows that combining an organic light-emitting display (OLED) device with an advanced optical film can achieve highly enhanced light extraction and low ambient light reflection without the need for a polarizer. The optical efficiency of the OLED device with the proposed film has been significantly improved compared to a polarizer-based OLED device, with external light reflection reduced to approximately 10%. Experimental data confirms that the film for enhancing optical efficiency (FEOE) improves the overall optical efficiency of OLED devices, making FEOE-based OLEDs of significant interest in materials science and display devices.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Chemistry, Physical
Yanyan He, Lulu Zhang, Guantong Chen, Yuanhong Liu, Shuangshuang Shi, Panpan Jiang, Jie Ding, Shu Xu, Chong Geng
Summary: A facile one-pot strategy to grow crystalline ZnO/SiO2 dual-layer encapsulation on CsPbBr3 perovskite nanocrystals (PNCs) has been reported. The encapsulation provides robust surface passivation to withstand the harsh conditions in hybrid light-emitting diodes (LEDs). The ZnO/SiO2 encapsulated PNCs show excellent stability, preserving 100% of their initial photoluminescence intensity after 500 hours of continuous irradiation.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Yu-Jin Kim, Sung-Won Kim, Ju-Ro Lee, Soong Ho Um, Yoon Ki Joung, Suk Ho Bhang
Summary: This study investigated the cytotoxic effects of LED and OLED light sources on stem cells, finding that the LED group induced higher apoptotic activity due to significant heat generation compared to OLED. Additionally, the LED group showed significant expression of intracellular reactive oxygen species, while increased cell proliferation was confirmed in the OLED group.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Review
Computer Science, Information Systems
Yubu Zhou, Huayu Gao, Jing Wang, Fion Sze Yan Yeung, Shenghuang Lin, Xianbo Li, Shaolin Liao, Dongxiang Luo, Hoi Sing Kwok, Baiquan Liu
Summary: Organic light-emitting diodes (OLEDs) are a promising technology for displays and lighting due to their numerous advantages. Ultrathin emitting nanolayers (UENs) have been used to develop OLEDs without the doping technique, simplifying device structure and achieving comparable performance to doped devices. This review comprehensively summarizes recent progress in UEN-based OLEDs, including a comparison between doped and doping-free OLEDs, effective design approaches, and future development prospects.
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)
Article
Chemistry, Multidisciplinary
Hyunbum Kang, Yeongjun Lee, Gae Hwang Lee, Jong Won Chung, Young-Nam Kwon, Joo-Young Kim, Yasutaka Kuzumoto, Sangah Gam, Sung-Gyu Kang, Ji Young Jung, Ajeong Choi, Youngjun Yun
Summary: A stretchable and skin-conformable photodiode (PD) is essential for the development of next-generation wearable electronics. This study demonstrates intrinsically stretchable polymer-based PDs (is-PPDs) with high detectivity and high mechanical stretchability. By using elastomeric photoactive layers and conducting polymer-based stretchable transparent electrodes, is-PPDs exhibit excellent detectivity and stable performance even under large deformation.
ADVANCED FUNCTIONAL MATERIALS
(2023)
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)
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
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.
Article
Chemistry, Physical
Wei Liu, Cheng Zhang, Riccardo Alessandri, Benjamin T. Diroll, Yang Li, Heyi Liang, Xiaochun Fan, Kai Wang, Himchan Cho, Youdi Liu, Yahao Dai, Qi Su, Nan Li, Songsong Li, Shinya Wai, Qiang Li, Shiyang Shao, Lixiang Wang, Jie Xu, Xiaohong Zhang, Dmitri V. Talapin, Juan J. de Pablo, Sihong Wang
Summary: We have synthesized stretchable electroluminescent polymers that can achieve near-unity theoretical quantum yield through thermally activated delayed fluorescence. Our polymers display 125% stretchability and 10% external quantum efficiency, and demonstrate a fully stretchable organic light-emitting diode. Stretchable light-emitting materials are crucial for the development of skin-like displays and optical biostimulation applications.
Correction
Chemistry, Physical
Wei Liu, Cheng Zhang, Riccardo Alessandri, Benjamin T. Diroll, Yang Li, Heyi Liang, Xiaochun Fan, Kai Wang, Himchan Cho, Youdi Liu, Yahao Dai, Qi Su, Nan Li, Songsong Li, Shinya Wai, Qiang Li, Shiyang Shao, Lixiang Wang, Jie Xu, Xiaohong Zhang, Dmitri V. Talapin, Juan J. de Pablo, Sihong Wang
Review
Chemistry, Multidisciplinary
Jia-Ahn Pan, Himchan Cho, Igor Coropceanu, Haoqi Wu, Dmitri V. Talapin
Summary: Colloidal nanocrystals are a diverse class of materials with tunable properties and are a promising alternative to traditionally grown bulk crystals or vapor-phase methods. However, challenges in patterned film formation hinder the integration of these materials into real-world devices. This Account discusses the development of stimuli-sensitive surface ligands that enable the direct patterning of nanocrystals while preserving their desirable properties. The mechanisms and examples of ligand-based patterning are explained, along with the advantages and disadvantages of different stimuli.
ACCOUNTS OF CHEMICAL RESEARCH
(2023)
Article
Chemistry, Physical
Jaehwan Lee, Jaeyeong Ha, Hyungdoh Lee, Hyunjin Cho, Doh C. Lee, Dmitri V. Talapin, Himchan Cho
Summary: This study proposes an efficient method for high-resolution patterning of InP-based quantum dots (QDs) using a photoacid generator while preserving their optical properties. By replacing chloride ligands with long-chain amine/carboxylate pair ligands, the photoluminescence quantum yield (PLQY) of the patterned InP-based QD films was successfully recovered to about 67% of the original PLQY, demonstrating the potential of the proposed patterning method.
ACS ENERGY LETTERS
(2023)
Article
Multidisciplinary Sciences
Seongkyu Maeng, Sun Jae Park, Jaehwan Lee, Hyungdoh Lee, Jonghui Choi, Jeung Ku Kang, Himchan Cho
Summary: We propose a universal direct photocatalytic patterning method that can preserve the optical properties of nanocrystals and other emissive nanomaterials, while enhancing the photoluminescence quantum yield and photostability of certain materials. This method has the potential to pattern various functional materials and devices in a nondestructive and simple way.
