Article
Materials Science, Multidisciplinary
Sadiq Mahmood, Chandra Kant, Aman Raj, Hong-Cheu Lin, Monica Katiyar
Summary: This study evaluates the lifetime of OLEDs using barrier films and/or thin film encapsulations. The results show that B2D encapsulation offers better barrier performance compared to B2B encapsulation. Additionally, the L50 values for G2B and G2D encapsulations are 54% and 82% of that for G2G encapsulation.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Hye In Yang, Kenkera Rayappa Naveen, Sang Min Cho, Jin Young Kim, Young Hun Jung, Jang Hyuk Kwon
Summary: This study focuses on improving the flexibility of thin film encapsulation (TFE) for flexible OLEDs by selecting appropriate polymers. The elastic modulus and surface energy of four different polymers were compared, and it was found that lowering these factors improved flexibility. The interaction between the polymer and aluminum oxide (Al2O3) did not greatly influence flexibility, but the penetration depth of Al2O3 was important.
ORGANIC ELECTRONICS
(2023)
Article
Engineering, Multidisciplinary
Ze Li, Zhenyu Wang, Ziqiang Chen, Jing Feng, Lianchao Shangguan, Jintao Wang, Hongbo Sun, Yu Duan
Summary: This paper presents a combined optical and electrical testing method that eliminates the influence of defects in the thin film encapsulation process and accurately measures the WVTR.
Article
Chemistry, Multidisciplinary
Chao Li, Shizhong Yue, Wang Tian, Yumin Ye, Jun Liu, Yanbin Huang, Zhitao Huang, Yulin Wu, Jiaqian Sun, Zeren Zhao, Keqian Dong, Kong Liu, Zhijie Wang, Shengchun Qu
Summary: With the development of optoelectronic devices towards miniaturization and flexibility, conventional submillimeter rigid encapsulation techniques are inadequate. This study proposes a nanometer to micrometer scale organic/inorganic hybrid thin film encapsulation (TFE) with self-cleaning ability, low water vapor transmittance rate, and super-hydrophobic performance. The TFE shows excellent barrier improvement and optical properties, making it a promising solution for the development of optoelectronic devices.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Jeong-Hyun Woo, Sun-Young Park, Donghwan Koo, Myoung Hoon Song, Hyesung Park, Ju-Young Kim
Summary: Ternary CuZrTi metallic glass thin films synthesized by sputtering are suggested as highly flexible and corrosion-resistant encapsulation materials. The films retain amorphous structure and do not oxidize even after 1000 hours in a harsh environment. The encapsulation performance is maintained even after repeated bending, indicating potential applications.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Myeongki Cho, Gyeong G. Jeon, Mingyu Sang, Tae Soo Kim, Jungmin Suh, So Jeong Shin, Min Jun Choi, Hyun Woo Kim, Kyubeen Kim, Ju Young Lee, Jeong Yeon Noh, Jong H. Kim, Jincheol Kim, Nochang Park, Ki Jun Yu
Summary: Perovskite solar cells (PSCs) have garnered attention as a promising alternative to conventional photovoltaics due to their high power conversion efficiency. However, their long-term stability has been compromised by moisture. This study proposes a room temperature thin-film encapsulation strategy using a superior water molecule barrier to protect and maintain the efficiency of PSCs.
JOURNAL OF POWER SOURCES
(2023)
Article
Nanoscience & Nanotechnology
Byoung-Hwa Kwon, Chul Woong Joo, Hyunsu Cho, Chan-mo Kang, Jong-Heon Yang, Jin-Wook Shin, Gi Heon Kim, Sukyung Choi, Sooji Nam, Kukjoo Kim, Chun-Won Byun, Nam Sung Cho, Sujung Kim
Summary: The organic/inorganic hybrid thin-film encapsulation developed in this study is applicable to the display industry and provides basic guidelines for the development of various technologies in academia and industry alike.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Dajeong Kim, Gyeong G. Jeon, Jong H. Kim, Jincheol Kim, Nochang Park
Summary: Perovskite solar cells (PSCs) have shown excellent photovoltaic properties, and their lifetime and moisture stability can be improved through PHPS/PET/PHPS multilayer encapsulation, while maintaining good mechanical stability.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
So Yeong Jeong, Yongmin Jeon, Eunji Kim, Gibok Lee, Yeon-Wha Oh, Chi Won Ahn, Eun Hae Cho, Yonghee Lee, Kyung Cheol Choi
Summary: Flexible see-through displays, using MXene material as electrodes, have been developed for various applications, offering improved information flow, safety, situational awareness, and overall user experience. The ultraflexible and environmentally stable MXene-based OLED display can stably operate in air condition for over 2000 h, endure repetitive bending deformation, and maintain environmental stability when exposed to wet surroundings. A matrix-addressable transparent OLED display was also demonstrated that could display letters and shapes.
Article
Nanoscience & Nanotechnology
Yu Zhao, Jiachen Kang, Wenzhe Huang, Peng Kong, Di An, Gufeng He
Summary: This study demonstrates the successful fabrication of a stable copper nanowire composite film by embedding the nanowires into a polydopamine-modified sodium alginate matrix. The introduction of the polydopamine modifier enhances the aging resistance of the sodium alginate layer, providing protection against moisture and oxygen, and also enhances the adhesion between the nanowire network and the substrate. This approach maintains the conductivity of the copper nanowires and produces a very smooth composite film.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Parisa Sharif, Eda Alemdar, Soner Ozturk, Omer Caylan, Tugba Haciefendioglu, Goknur Buke, Murat Aydemir, Andrew Danos, Andrew P. Monkman, Erol Yildirim, Gorkem Gunbas, Ali Cirpan, Ahmet Oral
Summary: Observation of thermally activated delayed fluorescence (TADF) has revolutionized the molecular design of highly efficient OLEDs. The effectiveness of TADF is largely determined by the first-order mixing coefficient (lambda) and the difference between singlet and triplet excited state energies (Delta E-ST). While Delta E-ST has been the main focus, the influence of spin-orbit coupling (H-SO) has been overlooked. In this study, TADF materials with increased H-SO are achieved by substituting heteroatoms with heavy-atom selenium, resulting in remarkable EQEs.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Yuyan Peng, Yalian Weng, Guixiong Chen, Deming Hong, Wenwen Wang, Chunliang Chen, Xiongtu Zhou, Yongai Zhang, Chaoxing Wu, Tailiang Guo, Qun Yan
Summary: In order to overcome the trade-off relationship between high flexibility and low permeability, a multi-layered structure of Al2O3/acrylic with wavy stacking interfaces was proposed. The wavy structures were generated by combining argon plasma treatment and soft-lithography. The wavy structures improved the mechanical properties of Al2O3/acrylic and increased the lifetime of OLEDs under bending conditions.
ORGANIC ELECTRONICS
(2023)
Article
Chemistry, Physical
Jing Zhou, Xueying Tian, You Gao, Shasha Zhang, Yiqiang Zhang, Zonghao Liu, Wei Chen
Summary: By developing a multilayer thin-film barrier with the architecture of parylene/MgF2/Al2O3, the long-term stability of perovskite solar cells (PSCs) can be greatly improved, leading to enhanced light and thermal stability of perovskite films and operational stability of PSCs.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
He Sun, Rui Li, Huijie Li, Zhengyan Weng, Guangfu Wu, Peter Kerns, Steven Suib, Xueju Wang, Yi Zhang
Summary: This paper introduces a bioinspired oil-infused slippery surface with excellent waterproof performance, which can serve as encapsulation materials for medical devices, underwater electronics, and more. Experimental tests and reaction-diffusion modeling reveal the key waterproof properties of this surface.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Review
Chemistry, Physical
Luke J. Sutherland, Hasitha C. Weerasinghe, George P. Simon
Summary: Perovskite solar cells and organic photovoltaics have shown rapid development in the past decade, with high efficiency and flexibility. However, operational stability remains a challenge, particularly due to degradation from moisture and oxygen exposure. Barrier encapsulation is a promising solution for delaying degradation in flexible devices.
ADVANCED ENERGY MATERIALS
(2021)
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)