Article
Nanoscience & Nanotechnology
Jonathan Barsotti, Alexandros G. Rapidis, Ikue Hirata, Francesco Greco, Franco Cacialli, Virgilio Mattoli
Summary: This novel OLED tattoo technology provides a quick and easy method for transferring OLEDs onto virtually any surface, showing potential for integrated conformable electronic circuits in the future.
ADVANCED ELECTRONIC MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Chuang Xue, Yanping Ni, Xiaoli Zhao, Ning He, Juntong Li, Hongyan Yu, Mingxin Zhang, Xiaoqian Liu, Bin Wang, Jing Sun, Xu Han, Junru Zhang, Jingchun Sun, Yanhong Tong, Qingxin Tang, Yichun Liu
Summary: This research presents a transparent and flexible organic light-emitting diode and successfully achieves transparent and flexible organic thin film transistors. The study provides important guidance for the construction of transparent and flexible organic light-emitting diodes and the development of wearable invisible displays.
MATERIALS TODAY PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Li Xiang, Huaidong Ye, Hui Wang, Yuwei Wang
Summary: In this work, carbon nanotube (CNT) thin film transistors (TFTs) with excellent conformability to biological surfaces were realized, demonstrating good electrical properties and flexibility even after being deformed. A flexible amplifier constructed based on the CNT TFTs exhibited low voltage supply and wide bandwidth, providing important capabilities for future advanced biological or clinical applications.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2023)
Review
Nanoscience & Nanotechnology
Jae Hong Jang, Shi Li, Dae-Hyeong Kim, Jiwoong Yang, Moon Kee Choi
Summary: The flexible displays that can change their shape freely have attracted significant attention in the field of human-friendly mobile electronics. Perovskite-based LEDs are also gaining popularity due to their exceptional optical characteristics. This review discusses the recent advances in flexible PeLEDs, including their materials, device structures, research progress, application examples, and future prospects.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Feisong Qin, Min Lu, Siqi Sun, Po Lu, Nannan Feng, Yanbo Gao, Xue Bai, Zhennan Wu, Junhua Hu, Yu Zhang
Summary: Introduces the use of PMMA modified printing paper as substrates for highly flexible red-emitting perovskite light emitting diodes (PeLEDs), which have easy synthesis and excellent optoelectronic properties. This extension of technology widens the opportunity of PeLEDs in extremely flexible and inexpensive applications.
IEEE ELECTRON DEVICE LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Junyi Zhao, Li-Wei Lo, Haochuan Wan, Pengsu Mao, Zhibin Yu, Chuan Wang
Summary: A method for manufacturing perovskite LEDs (PeLEDs) directly on an elastomer substrate using inkjet printing process is reported in this study, significantly reducing the fabrication time. The printed PeLEDs have a novel structure and exhibit excellent performance.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Ruiqing Li, Yeyang Wang, Yujie Chen, Jiaxuan Zhao, Yawei Wang, Jingxi An, Yanan Lu, Yuehua Chen, Wenyong Lai, Xinwen Zhang, Wei Huang
Summary: In this study, a low-cost and efficient fabric-based lighting device called Fa-TPLEDs is presented. The device consists of a smooth reflective Ag cathode and a composite transparent anode made of polydimethylsiloxane/silver nanowires/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate). The Fa-TPLEDs show excellent optoelectrical properties and robust mechanical flexibility, making them suitable for wearable displays.
Article
Nanoscience & Nanotechnology
Junho Kim, Eungjun Kim, Jaehyeok Park, Jinouk Song, Subon Kim, Hanul Moon, Seunghyup Yoo
Summary: This study proposes a new type of ultrathin substrate embedded with an inverted microlens array (IMLA) for highly efficient foldable OLEDs. The IMLA enables OLEDs to be bent at a sub-100 μm bending radius while maintaining high light outcoupling efficiency. The potential effects of optical diffraction and the local modulation of strain and stress in ultrathin devices are carefully analyzed, and the proposed OLEDs achieve a maximum external quantum efficiency of 58% without optical side effects, withstanding 10,000 trials of repeated folding tests at a bending radius of 50 μm.
Article
Chemistry, Multidisciplinary
Xiaoli Zhao, Shuya Wang, Yanping Ni, Yanhong Tong, Qingxin Tang, Yichun Liu
Summary: Organic thin-film transistors (OTFTs) have unique advantages but face challenges in commercialization, a novel photolithography fabrication strategy is proposed to demonstrate the potential of high-performance and high-precision organic devices.
Review
Chemistry, Multidisciplinary
Shuping Hou, Jie Liu, Feipeng Shi, Guo-Xu Zhao, Jia-Wei Tan, Gong Wang
Summary: Flexible organic light-emitting diodes and perovskite light-emitting diodes have been investigated, and silver nanowires electrodes are found to have potential applications as transparent conductive electrodes. This mini-review summarizes the advancements in silver nanowires electrodes for LEDs and discusses the relationship between electrode optimization and device performance.
FRONTIERS IN CHEMISTRY
(2022)
Article
Chemistry, Physical
Lianna Chen, Zhiyuan Qin, Shuming Chen
Summary: In this study, a new method has been developed to achieve high-resolution pixelated emission by controlling the thickness of transparent electrodes, resulting in a color-converting cavity that can selectively convert unpatterned quantum-dot white emission into saturated red, green, and blue emission. This method enables ultrahigh density red, green, and blue emission with a resolution of approximately 1700 pixels per inch, as well as achieving a color gamut of 111% NTSC.
Review
Chemistry, Physical
Taesoo Lee, Minhyung Lee, Hansol Seo, Minjun Kim, Beomsoo Chun, Jeonghun Kwak
Summary: This review summarizes previous studies on top-emitting device structures and discusses ways to improve the performance of top-emitting quantum dot-based light-emitting diodes (TQLEDs). The relevant theories for the optoelectrical properties of TQLEDs are introduced, and advancements in device optimization are presented. Multilateral strategies for TQLEDs to be widely applied in advanced industries are also discussed. This review aims to provide valuable insights for realizing commercial TQLEDs applicable to a broad range of applications.
Review
Computer Science, Information Systems
Han Eol Lee
Summary: This paper introduces the research trend and latest bio-applications of micro LEDs as a future light source in the field of biomedicine, highlighting their potential applications in optogenetics and hair regrowth.
Article
Materials Science, Multidisciplinary
Peter Andersson Ersman, Roman Lassnig, Jan Strandberg, Peter Dyreklev
Summary: A flexible, electrochromic, active matrix addressed display (AMAD) is demonstrated, manufactured on a plastic substrate solely using screen printing. Each organic electrochromic smart pixel (OESP) is a combination of an organic electrochromic display (OECD) and an organic electrochemical transistor (OECT), printed in multilayered vertical architectures. The conduction state of the OECT enables control of the color state of its corresponding OECD, while electrical wires connecting each component are formed by screen printing with silver or nanocopper-based ink.
ADVANCED ENGINEERING MATERIALS
(2021)
Review
Chemistry, Multidisciplinary
Kory Schlingman, Yiting Chen, R. Stephen Carmichael, Tricia Breen Carmichael
Summary: Light-emitting electrochemical cells (LECs) are simple electroluminescent devices that use a mechanism involving both ionic and electronic transport. Unlike organic light-emitting diodes (OLED), LECs have flourished in academic research due to their simple structure and unique features, leading to the development of flexible and stretchable light-emitting devices.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Lulu Sun, Mengyuan Yang, Xinyun Dong, Lu Hu, Lin Hu, Cong Xie, Tiefeng Liu, Fei Qin, Wen Wang, Youyu Jiang, Mengying Wu, Wei Cao, Felipe A. Larrain, Canek Fuentes-Hernandez, Ke Meng, Bernard Kippelen, Peter Mueller-Buschbaum, Yinhua Zhou
Summary: A novel method called orthogonal liquid-liquid-contact (OLLC) doping has been developed for the preparation of electrically doped films, which enables efficient doping at the interface of water and an organic solvent during film formation. This technique offers the advantages of ease of operation and high efficiency, making it suitable for devices such as organic photovoltaics and light-emitting diodes.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Xiaojia Jia, Canek Fuentes-Hernandez, Wen-Fang Chou, Bernard Kippelen
Summary: The organic-based photodetector combines a dual-gate organic thin-film transistor with an organic photodiode to achieve high effective responsivity at low optical power levels. It operates in photovoltaic mode at 635 nm with responsivity values of 10 A W-1 at optical powers lower than 10 nW, and modeling suggests values up to 10^5 A W-1 can be achieved at 1 nW optical powers using current technology and organic semiconductors.
ORGANIC ELECTRONICS
(2021)
Article
Nanoscience & Nanotechnology
Felipe A. Larrain, Canek Fuentes-Hernandez, Yi-Chien Chang, Victor A. Rodriguez-Toro, Silja Abraham, Bernard Kippelen
Summary: Increasing the volume of the polymer film facilitates the infiltration of the PMA Keggin structure, resulting in an increased electrical p-type doping level. By controlling the volume of the polymer film, the effectiveness of solution-based electrical p-type doping can be optimized.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Physics, Applied
Gunhee Kim, Canek Fuentes-Hernandez, Sangmoo Choi, Xiaojia Jia, Bernard Kippelen
Summary: This study presents a method for extracting the intrinsic contact resistance from organic thin-film transistors (OTFTs), which can be applied to devices with different geometries. The research shows that the intrinsic contact resistance decreases as the gate capacitance density increases.
APPLIED PHYSICS LETTERS
(2021)
Article
Multidisciplinary Sciences
Youngrak Park, Canek Fuentes-Hernandez, Kyungjin Kim, Wen-Fang Chou, Felipe A. Larrain, Samuel Graham, Olivier N. Pierron, Bernard Kippelen
Summary: This study has developed a skin-like elastomeric bulk heterojunction (e-BHJ) photoactive layer with a Young's modulus comparable to human tissues and a high strain at break of 189%. Elastomeric organic photodiodes based on this e-BHJ photoactive layer exhibit low electronic noise currents in the tens of femtoamperes range and noise equivalent power values in the tens of picowatts range under at least 60% strain.
Article
Chemistry, Physical
Matthew W. Cooper, Xiaoqing Zhang, Yadong Zhang, Ajith Ashokan, Canek Fuentes-Hernandez, Seyhan Salman, Bernard Kippelen, Stephen Barlow, Seth R. Marder
Summary: This study compares the properties of carbazole-substituted 2-methyl-5-phenyl-1,3,4-oxadiazoles to their 2,5-diphenyl analogues. The fluorescence of the former compounds is blue-shifted relative to the latter, while similar estimates of the singlet-triplet energy separation are maintained. Additionally, the 2-methyl derivatives show higher reverse intersystem crossing rates and improved efficiency rolloff at high current densities in organic light-emitting diodes.
JOURNAL OF PHYSICAL CHEMISTRY A
(2022)
Article
Chemistry, Physical
Farzaneh Saeedifard, Yi-Chien Chang, Bernard Kippelen, Seth R. Marder, Stephen Barlow
Summary: Insoluble electrically n-doped fullerene-containing films were obtained by thermal annealing, and the covalent tethering and electrical doping reactions were studied. Thermal insolubilization process reduced the electrical conductivity of the films and immobilized the dopant, limiting its diffusion into adjacent layers.
JOURNAL OF PHYSICAL CHEMISTRY B
(2022)
Article
Engineering, Environmental
Minwoo Nam, Youngrak Park, Chihyung Lee, Gunhee Kim, Felipe A. Larrain, Canek Fuente-Hernandez, Doo-Hyun Ko, Bernard Kippelen
Summary: The commercial viability of organic photovoltaics (OPVs) can be improved by simplifying device geometry and fabrication complexity. By using solution-based p-type electrical doping, efficient single-layer OPVs can be realized. Post-process immersion in a 12-molybdophosphoric acid hydrate (PMA) solution reduces trap density and charge recombination without changing the BHJ morphology, enabling the fabrication of high-performance single-layer OPVs with economic top electrode metals.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Organic
Farzaneh Saeedifard, Yasir Naeem, Yannick T. Boni, Yi-Chien Chang, Junxiang Zhang, Yadong Zhang, Bernard Kippelen, Stephen Barlow, Huw M. L. Davies, Seth R. Marder
Summary: Hole-transport materials based on triarylamine derivatives have critical applications in organic electronics. This study demonstrates a method using Rh-carbenoid chemistry to incorporate carboxylic esters and norbornene functional groups into triarylamine materials. The resulting materials exhibit similar properties to those synthesized by conventional means and offer the potential for diverse hole-transport materials with different functional groups.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Physics, Applied
Yi-Chien Chang, Felipe A. Larrain, Canek Fuentes-Hernandez, Youngrak Park, Bernard Kippelen
Summary: We report the application of solution-based p-type electrical doping using 12-molybdophosphoric acid hydrate (PMA) to fabricate organic tandem solar cells. This doping approach allows embedding the hole-collecting component in the photoactive layer, simplifying the device architecture. The charge recombination stack comprising a PMA-doped bottom layer and a trilayer of Ag/AZO/PEIE is compatible with solution-processed top layer.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Organic
Farzaneh Saeedifard, Yasir Naeem, Yannick T. Boni, Yi-Chien Chang, Junxiang Zhang, Yadong Zhang, Bernard Kippelen, Stephen Barlow, Huw M. L. Davies, Seth R. Marder
Summary: Hole-transport materials (HTMs) based on triarylamine derivatives are important in organic electronic applications. This study presents a method to incorporate carboxylic esters and norbornene functional groups into sp2 C-H bonds of triarylamine materials using Rh-carbenoid chemistry. The resulting materials exhibit similar properties to those synthesized by conventional means and offer a straightforward approach to diverse HTMs with different functional groups.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Silja Abraham, Canek Fuentes-Hernandez, Sharmistha Mukhopadhyay, Kumar Singh, Hyung Nun Kim, Oliver Moreno, Claire M. M. Tran, Dharam Raj Kumar, John C. C. Stooksbury, Surya R. R. Kalidindi, Nolan E. E. Hertel, Michel P. P. Shannon, Bernard Kippelen
Summary: Cross-linked polyvinyltoluene (PVT) based plastic scintillators loaded with dyes exhibiting thermally activated delayed fluorescence (TADF) and various amounts of (caproate)di-(methacrylate) bismuth (CMB) were developed. The results of this study show that the cross-linking approach and the use of TADF dyes yield scintillators with good mechanical properties, but the addition of CMB reduces the light yield in gamma spectroscopy experiments.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Engineering, Electrical & Electronic
Dingtian Zhang, Canek Fuentes-Hernandez, Raaghesh Vijayan, Yang Zhang, Yunzhi Li, Jung Wook Park, Yiyang Wang, Yuhui Zhao, Nivedita Arora, Ali Mirzazadeh, Youngwook Do, Tingyu Cheng, Saiganesh Swaminathan, Thad Starner, Trisha L. Andrew, Gregory D. Abowd
Summary: In this research, we introduce in-sensor analog computation to overcome the limitations of conventional vision-based systems. A computational photodetector is developed to extract mid-level vision features and measure them using a wireless system. This technology can be applied in various applications, ranging from explicit surface interactions to implicit activity detection.
NPJ FLEXIBLE ELECTRONICS
(2022)
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)
