Article
Multidisciplinary Sciences
Hongyuan Fu, Jia Yao, Ming Zhang, Lingwei Xue, Qiuju Zhou, Shangyu Li, Ming Lei, Lei Meng, Zhi-Guo Zhang, Yongfang Li
Summary: This study developed a simple and inexpensive boron trifluoride etherate-catalyzed Knoevenagel condensation method for the efficient synthesis of high-performing acceptor-donor-acceptor structured small molecule acceptors. Compared with traditional methods, this approach significantly reduces costs and provides an important synthetic tool for the development of PSCs and other emerging technologies.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Xin Song, Yuanxia Song, Hao Xu, Shenzheng Gao, Yanfeng Wang, Junjie Li, Jiefeng Hai, Wenzhu Liu, Weiguo Zhu
Summary: This study proposes a solvent-induced anti-aggregation strategy to improve the film quality and electron-transport capability of small molecule electron-transporting layers (ETL). This approach not only addresses the aggregation issue but also leads to efficient and stable organic optoelectronic devices.
ADVANCED ENERGY MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Swati Bishnoi, Ram Datt, Sandeep Arya, Sonal Gupta, Ramashanker Gupta, Wing Chung Tsoi, Shailesh N. Sharma, Shashikant P. Patole, Vinay Gupta
Summary: This article provides a detailed insight into the efficient cathode buffer layers (CBLs) in conventional and inverted organic solar cells (OSCs). The CBL can improve the performance of the devices by reducing contact resistance and charge recombination, leading to efficient charge extraction and enhanced power conversion efficiency. The chemical composition, morphology, thickness, dopants, and deposition conditions of CBL and their effects on device performance are discussed. The best performing CBLs are summarized and their chemical structures are examined.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Energy & Fuels
Chao Hu, Jingjing Xu, Songming Cai, Peihao Huang, Jiyeon Oh, Changduk Yang, Shanshan Chen, Kuan Sun, Ke Yang, Shirong Lu
Summary: The research found that using fused-aromatic-ring as a conjugated side chain strategy can effectively improve the performance of organic solar cell devices by fine-tuning and enhancing molecular stacking/orientation and phase separation. This resulted in devices with increased short-circuit current density, higher fill factor, and improved power conversion efficiency.
Article
Nanoscience & Nanotechnology
Yeongkwon Kang, Jung Won Yoon, Seok Woo Lee, Hyungju Ahn, Siwon Yun, Jongchul Lim, Jihoon Lee, Dong Wook Chang, Hyosung Choi, Bong-Gi Kim
Summary: To investigate the effect of miscibility between conjugated polymers (CPs) and Y6 on the morphology of bulk-heterojunction (BHJ) structures, three different CPs with similar chemical structures but varying miscibility with Y6 were studied. The interface morphology and interlocked dimensions were compared quantitatively using a square-wave model after selectively removing Y6 from the CP/Y6 blend films. It was found that as CP-Y6 miscibility increases, a higher intermixed interface is formed, while a decrease in miscibility leads to a decrease in the dimensions formed by phase separation and an increase in width.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Dan Zhou, Jianwei Quan, Hehui Zhang, Haolan Zheng, Zhentian Xu, Fang Wang, Lin Hu, Jiabin Liu, Yongfen Tong, Lie Chen
Summary: The study reports the synthesis of a siloxane-modified perylene-diimide derivative with excellent light transmittance and solubility, which can be used as an electron transport layer in organic solar cells to achieve high power conversion efficiency.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Alem Araya Meresa, Tae-won Lee, Solin Lee, Felix Sunjoo Kim, Kwangyong Park
Summary: Three novel tetraaryldiamines were synthesized and applied as an interlayer in PTB7-Th:PC71BM solar cells. The results showed that they could enhance the power conversion efficiency and external quantum efficiency of the cells, as well as improve their environmental stability.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Yun-Ming Sung, Abdul Khalik Akbar, Sajal Biring, Chia-Feng Li, Yu-Ching Huang, Shun-Wei Liu
Summary: In this study, the effect of introducing a ZnO layer between ITO and the active layer in polymer solar cells was investigated. It was found that using ZnO nanoparticles significantly improved the efficiency of the devices, and the preparation method of ZnO influenced the open-circuit voltage and overall performance of the devices.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Nailiang Qiu, Chunyan Liu, Haijiao Lang, Jingyang Xu, Rui Su, Jie Jiang, Jiaqi Tian, Jisen Li
Summary: A new small-molecule donor, BTEHR-FT, has been designed and synthesized for the fabrication of all-small-molecule organic solar cells (ASM-OSCs). It exhibits excellent solubility and thermal stability. By introducing fluorine atoms, it achieves a low-lying highest occupied molecular orbital energy level. After thermal annealing treatment, the solar cell shows a significant enhancement in power conversion efficiency.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Yiming Bai, Rongkang Shi, Yinglong Bai, Fuzhi Wang, Jun Wang, Tasawar Hayat, Ahmed Alsaedi, Zhan'ao Tan
Summary: A facile synthesis method was used to prepare indium oxide and gallium oxide cathode buffer layers, achieving high photovoltaic conversion efficiency in organic solar cells. The different work functions of indium oxide and gallium oxide led to distinct performance in the devices.
SCIENCE CHINA-MATERIALS
(2021)
Article
Chemistry, Applied
Sabrina Aufar Salma, Rahmatia Fitri Binti Nasrun, Qurrotun Ayuni Khoirun Nisa, Dong Hwan Son, Joo Hyun Kim
Summary: In this study, small molecules based on PDI with amino N-oxide, dimethyldipropylenetriamino, and ethyl tosylate were used as the cathode buffer layer (CBL) in inverted type organic solar cells (OSCs). The thermal instability of PDIN-O, when used as the CBL, was addressed by introducing the side groups dimethyldipropylenetriamino and tosylate. The devices with PDIN-O, PDIN-N, and PDIN-OTs exhibited power conversion efficiencies (PCE) of 12.5%, 13.3%, and 14.2%, respectively. The ability to modulate the CBL in nonfullerene organic solar cells by introducing side groups to tune the work function at the cathode interface was demonstrated in this study. PDIN-OTs showed promise as a CBL material in inverted type devices and can be further explored by changing the counterion or side group.
Article
Chemistry, Multidisciplinary
Zhijun Zou, Fen Li, Jing Fang, Mingxin Chen, Xiaoxiang Sun, Chang Li, Jiayou Tao, Gaohua Liao, Jianjun Zhang
Summary: The bilayer structure of ZnO/SnO2 CBL, prepared by the low-temperature UV-ozone sintering process, exhibits exceptional performance in organic solar cells with a power conversion efficiency of 10.56% and improved stability. This process has great application potential due to its low temperature and excellent transmittance.
Review
Chemistry, Multidisciplinary
Roberto Sorrentino, Erika Kozma, Silvia Luzzati, Riccardo Po
Summary: Polymer solar cells based on non-fullerene acceptors have achieved high power conversion efficiencies recently. Interlayers play a key role in charge collection and device stability, but the mechanisms are not fully understood yet.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
Article
Polymer Science
Guoping Zhang, Lihong Wang, Chaoyue Zhao, Yajie Wang, Ruiyu Hu, Jiaxu Che, Siying He, Wei Chen, Leifeng Cao, Zhenghui Luo, Mingxia Qiu, Shunpu Li, Guangye Zhang
Summary: This study improves the efficiency and fill factor of all-polymer solar cells through interfacial layer engineering, providing better potential for large-scale production of organic solar cells.
Article
Materials Science, Multidisciplinary
Yanan Shi, Junxiu Pan, Hao Zhang, Chen Yang, Ziqi Zhang, Dan Deng, Jianqi Zhang, Kun Lu, Zhixiang Wei
Summary: In this study, small molecule acceptors with unfused cores were designed and synthesized to improve the power conversion efficiency of organic solar cells. It was found that increasing substituents on the intermediate electron-donating groups could weaken the planarity of the molecules but enhance compatibility with the donor molecules.
ORGANIC ELECTRONICS
(2021)
Article
Chemistry, Multidisciplinary
Yu-Yu Hsieh, Rafael S. Sanchez, Guillaume Raffy, Jing-Jong Shyue, Lionel Hirsch, Andre Del Guerzo, Ken-Tsung Wong, Dario M. Bassani
Summary: Acridine-based donor-acceptor chromophores with E-type delayed fluorescence were modified with bis-biuret H-bonding motifs to form hollow spheres for OLED devices. The contribution of the delayed component in solution is sensitive to disruption of aggregates.
CHEMICAL COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Yi-Sheng Chen, Dian Luo, Wei-Chih Wei, Bo-Lin Chen, Tzu-Hung Yeh, Shun-Wei Lu, Ken-Tsung Wong
Summary: Two new SF-centered donors, DPSF and DTSF, were developed in this study to blend with acceptor CN-T2T for exciplex formation, allowing for efficient NIR OLEDs with high efficiency and stability.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Zhe-Min Shi, Yu-Che Hou, Cheng-Yueh Chen, Guang-Hsun Tan, Hao-Cheng Lin, Po-Ting Lai, Cheng-Hung Hou, Jing-Jong Shyue, Wei-Kai Cheng, Tsung-Kai Su, Hao-Wu Lin
Summary: This paper describes the first use of vacuum-deposited YF3 films as active materials in memristors. These YF3 memristors have extraordinary dual digital/analog operation modes, excellent recognition accuracy, and high-temperature stability.
ADVANCED ELECTRONIC MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Guan-Cheng Liu, Tzu-Hao Huang, Hao-Wen Wang, Chao-Hsien Hsu, Pi-Tai Chou, Wen-Yi Hung, Ken-Tsung Wong
Summary: Two new acceptors, p-QCN and m-QCN, were synthesized and blended with the donor CPTBF to form exciplex-forming blends. The energy levels of p-QCN and m-QCN were modulated by substituents 4- and 3-benzonitrile, respectively. The exciplex-forming blends showed red-shifted emissions and were characterized by time-resolved photoluminescence. The device efficiency was improved by using different blend ratios and a new fluorescent emitter, BPBBT, was introduced to further enhance the performance.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Chun-Yen Lin, Chen-Han Lu, Kai-Hua Kuo, Miaosheng Wang, Yipeng Tang, Yixuan Dou, Bin Hu, Chung-Chih Wu, Ken-Tsung Wong
Summary: This work presents the design of new blue TADF emitters with a triphenylamine-based macrocyclic donor, which is found to enhance reverse intersystem crossing and triplet-upconversion efficiency. Experimental results show that incorporating the macrocyclic donor in the blue device significantly improves its performance, achieving a maximum external quantum efficiency of 32.2%. This study offers a new strategy for designing efficient blue organic light-emitting diodes.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Meng-Ju Tsai, Wei-Lun Huang, Li-Ming Chen, Guo-Lun Ruan, Dian Luo, Zong-Liang Tseng, Ken-Tsung Wong
Summary: A new dicarbazole-based donor, BCz3Ph, was synthesized and characterized for exciplex formation. The green-emitting layer (EML) of solution-processed OLED devices was formed by blending the new exciplex BCz3Ph:PO-T2T with a photoluminescence quantum yield (PLQY) of 43% and thermally activated delayed fluorescence (TADF) character. In order to improve hole injection into the EML, a new cross-linkable monomer, BCzC4Sy, was designed to form a solvent resistant hole-transporting layer (HTL) after thermal polymerization. The study demonstrates the potential of employing a thermally cross-linkable HTM and exciplex-based EML to produce high efficiency solution-processed OLEDs.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Biochemistry & Molecular Biology
Yu-Yu Hsieh, Jing-Jong Shyue, Yu-Chiang Chao, Ken-Tsung Wong, Dario M. Bassani
Summary: The incorporation of biuret hydrogen-bonding sites onto chiral binaphthalene-based chromophores was investigated for the synthesis of sub-micron-sized, vesicle-like aggregates with chiroptical properties. Luminescent chromophores were synthesized via Suzuki-Miyaura coupling of the corresponding chiral 4,4'-dibromo-1,1'-bis(2-naphthol), and their emission spectrum could be tuned through conjugation extension. Scanning electron microscopy confirmed the spontaneous formation of hollow spheres with a diameter of ca. 200-800 nm, along with strong asymmetry in the circularly polarized absorption spectra. Circular polarization of the emission, with values of g(lum) = ca. 10(-3), could be further enhanced upon aggregation.
Article
Materials Science, Multidisciplinary
Miaosheng Wang, Dian Luo, Tzu-Hung Yeh, Yi-Hsuan Huang, Chang-Lun Ko, Wen-Yi Hung, Yipeng Tang, Shun-Wei Liu, Ken-Tsung Wong, Bin Hu
Summary: Designing in-plane-oriented light-emitting dipoles is crucial for developing efficient OLEDs. This study explores the anisotropy dynamics of light-emitting dipoles in time and energy domains. By suppressing host-guest Coulomb scattering, the anisotropy dynamics can be extended in both domains, leading to a high external quantum efficiency of 34.01% in the OLED system.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Kai-Hua Kuo, Yi-Jhen Chui, Yu-Che Hou, Po-Ting Lai, Cheng-Yueh Chen, Guang-Hsun Tan, Hao-Wu Lin, Ken-Tsung Wong
Summary: This study reports three organic conjugated small molecules and their application in memristor behaviors. By appropriate molecular design and doping strategy, the endurance and stability of the devices have been improved.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Chen-Han Lu, Chun-Yen Lin, Shi-Xian Zeng, Yu-Pin Chou, Chia-Hsun Chen, Yi-Hung Liu, Jiun-Haw Lee, Chung-Chih Wu, Ken-Tsung Wong
Summary: This study presents an efficient molecular engineering approach to modifying the donor or acceptor features of TADF molecules for deep-blue emission. Two emitters, c-ON-MeTRZ and c-NS-MeTRZ, were synthesized and characterized by introducing oxygen and sulfone as a bridge unit onto the macrocyclic donor. The modified emitters showed blue-shifted emissions with high photoluminescence quantum yields (PLQYs) and retained TADF characteristics.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Applied
Bing-Huang Jiang, Yu-Ting Liao, Yu-Hsuan Tu, Ken-Tsung Wong, Chih-Ping Chen
Summary: In this study, the performance of donor molecules with an isoindigo-based core was compared to that of a thienoisoindigo-based counterpart in all-small-molecule-based optoelectronic devices. The isoindigo-based molecule showed deeper energy level, efficient light harvesting, and higher carrier mobility, leading to over eight times greater organic photovoltaic performance compared to the thienoisoindigo-based molecule. The optimized organic photodetector incorporating the isoindigo-based molecule exhibited excellent properties, suggesting great potential for isoindigo as a building block for OPDs.
Article
Chemistry, Multidisciplinary
Chun-Yen Lin, Chao-Hsien Hsu, Chieh-Ming Hung, Chi-Chi Wu, Yi-Hung Liu, Emily Hsue-Chi Shi, Tse-Hung Lin, Yuan-Cheng Hu, Wen-Yi Hung, Ken-Tsung Wong, Pi-Tai Chou
Summary: The inclusion complexation provides a new approach to understand the structure, formation thermodynamics, and properties of exciplexes. It enables the fabrication of efficient organic light-emitting diodes (OLEDs) with a high external quantum efficiency.
Article
Materials Science, Multidisciplinary
Bo-Yuan Chuang, Chun-Yao Ke, Yu-Jen Shao, Ken-Tsung Wong, Guey-Sheng Liou
Summary: Polyarylamine-based dielectric electrets and pentacene as p-type semiconductors were used to fabricate photoresponsive flash transistor memories. The PDTPmC electret, with high dipole moment, coplanar conformation, and highly conjugated structure, demonstrated outstanding hole-trapping capability and photorecoverability. The PDTPmC-based memory device exhibited excellent switching reliability and readout current ratio.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jie Yan, Yixin Wu, I-Che Peng, Yi Pan, Shek-Man Yiu, Ken-Tsung Wong, Wen-Yi Hung, Yun Chi, Kai-Chung Lau
Summary: In this study, three Ir(iii) based carbene complexes were synthesized and characterized. These complexes exhibited sky-blue emission and high photoluminescent quantum yields. One of the complexes showed high efficiency and external quantum efficiency in blue OLED devices.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Physical
Yi-Sheng Chen, Wei-Chih Wei, Hao Chen, Tsung-Lin Tsai, Yu-Cheng Kung, Wen-Yi Hung, Ken-Tsung Wong
Summary: This study examines exciplex formation and photoluminescence characteristics by blending hexaphenylbenzene-based donors and triazine-centered acceptors. The results show that effective exciplex formation and delayed fluorescence can be achieved through energy level alignment and the incorporation of fluorescent dopants. The combination of an exciplex cohost and a D-A-D-type fluorescence emitter is an effective strategy for developing high-efficiency OLED devices with all fluorescent materials.
MOLECULAR SYSTEMS DESIGN & ENGINEERING
(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)
