Article
Chemistry, Physical
Timo Raab, Tim Mayer, Tobias Seewald, Lukas Schmidt-Mende
Summary: This study investigates the spin coating process of a P3HT/PC71BM blend and reveals that it can be divided into three phases. The crystallization phase has the most significant influence on the final morphology of the film.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Asif Mahmood, Jin-Liang Wang
Summary: This study aims to predict the performance of P3HT based organic solar cells through machine learning models, selecting molecular descriptors with positive impact on PCE for better prediction, and providing new insights for material design and candidate selection.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Chemistry, Multidisciplinary
Sudhakar Narra, Shuo-En Tsai, Kamlesh Awasthi, Shailesh Rana, Eric Wei-Guang Diau, Nobuhiro Ohta
Summary: The study investigated the photoluminescence and electrophotoluminescence of bulk heterojunction samples of P3HT and PCBM thin films, finding that as the PCBM content increased, the PL quantum yield decreased monotonically, with static quenching playing a dominant role.
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
(2022)
Article
Engineering, Electrical & Electronic
D. Prashant, Suneet Kumar Agnihotri, Dip Prakash Samajdar
Summary: In this study, a comprehensive optoelectronic analysis of a hybrid solar cell based on P3HT:PCBM/GaAs nanocone arrays was conducted. The results showed that the proposed hybrid solar cell exhibited high absorptance and photocurrent density, and maintained good performance under oblique incident conditions.
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Idris Candan
Summary: This study found that post-production thermal annealing at around 150 degrees Celsius significantly enhanced the performance of organic solar cells.
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
(2021)
Article
Polymer Science
D. G. K. Kalara Namawardana, R. M. Geethanjana Wanigasekara, W. T. M. Aruna P. K. Wanninayake, K. M. D. Charith Jayathilaka, Ruwan P. Wijesundera, Withana Siripala, Muhammad Imran Malik
Summary: Polymer based organic solar cells are promising candidates for clean and renewable energy production. In this study, the insertion of a ZnO layer between the stainless steel substrate and the active layer significantly improved the device performance, achieving the highest efficiency when using ZnO prepared by sol-gel technique.
JOURNAL OF POLYMER ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Do Hui Kim, Febrian T. A. Wibowo, Dongchan Lee, Narra Krishna, Sujung Park, Shinuk Cho, Sung-Yeon Jang
Summary: By addressing the interface defects and chemically modifying the PM6:Y6-based i-OPV, the power conversion efficiency and long-term stability were significantly improved. The modified mi-OPV achieved a PCE of 17.42%, the highest among reported devices of its kind. Moreover, after 1200 hours of air storage and illumination, it retained approximately 90% and 80% of its initial PCE, respectively.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Chemistry, Physical
Myles A. Steiner, Ryan M. France, Jeronimo Buencuerpo, John F. Geisz, Michael P. Nielsen, Andreas Pusch, Waldo J. Olavarria, Michelle Young, Nicholas J. Ekins-Daukes
Summary: High-efficiency solar cells are crucial for various applications, with lower energy bandgaps achieved through the use of multiple quantum wells. Incorporating strain-balanced GaAsP/GaInAs QWs into solar cells has led to increased efficiency.
ADVANCED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Jiaxuan Ren, Shang Gao
Summary: This research investigates the effect of a high external electric field on the ordered structure of a blended film composed of PTB7 and P3HT. The study finds that with the application of an optimal electric field, the orderness of the blended film is improved and the hole mobility is enhanced.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Materials Science, Multidisciplinary
Elisa Trippodo, Vincenzo Campisciano, Liang-Wen Feng, Yao Chen, Wei Huang, Joaquin M. Alzola, Ding Zheng, Vinod K. Sangwan, Mark C. Hersam, Michael R. Wasielewski, Bruno Pignataro, Francesco Giacalone, Tobin J. Marks, Antonio Facchetti
Summary: Organic solar cells based on donor-acceptor blends have shown great potential in efficiency improvement, but performance degradation is still a major obstacle for commercialization. Ternary solar cells with fullerene acceptors as the third component exhibit enhanced stability with over 90% retention of initial power conversion efficiency even after 6 months of storage. This improved stability is attributed to a more robust blend morphology that reduces charge recombination in the aging process.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Computer Science, Information Systems
Md Shofiqul Islam
Summary: This study analytically investigated the current of P3HT:PCBM-based organic solar cells, estimating the charge carriers generated and resolving inconsistencies in total current at different positions by considering spatial recombination coefficients. The research provides better results by including spatial recombination coefficients, space-and wavelength-dependent excitons, and improved dissociation probability in analytical calculations, which will help improve the prediction and design of organic solar cells.
Article
Energy & Fuels
Joyprokash Chakrabartty, Md. Aminul Islam, Sahariar Reza
Summary: Perovskite solar cells have achieved competitive photovoltaic conversion efficiency with other commercial solar cells, but long-term stability remains a major hindrance for commercialization. Recent research on low-dimensional perovskites aims to improve photo-stability, while two-dimensional/three-dimensional bilayer PSCs show potential to overcome limitations in output power. Incorporating 2D perovskite into 3D perovskite may enhance throughput and reduce fabrication costs for active absorber layers in inverted PSCs.
Article
Medical Laboratory Technology
Chao Zhang, Ying Yan, Jie Zeng, Jiali Liu, Na Dong, Chuanbao Zhang
Summary: The National Centre for Clinical Laboratories (NCCL) in China launched the EQA Program for blood lead measurement in 2006 to assess its standardisation process. The results showed that the pass rates of participating laboratories gradually increased over six years, while the inter-laboratory mean CVs decreased. Graphite Furnace Atomic Absorption Spectrometry (GFAAS) and Tungsten Ship Atomic Absorption Spectrometry (TSAAS) demonstrated better performances compared to other detection methods.
CLINICA CHIMICA ACTA
(2023)
Article
Multidisciplinary Sciences
W. T. M. A. P. K. Wanninayake, D. G. K. K. Namawardana, R. M. G. Wanigasekara, K. M. D. C. Jayathilaka, R. P. Wijesundera, W. Siripala, M. I. Malik
Summary: Polymer solar cells (PSCs) have gained significant interest as potential candidates for solar energy conversion. In this study, the inorganic transition metal oxide, negative type cuprous oxide (n-Cu2O), was used as the electron selective transport layer (ESTL) to enhance the performance of PSCs. The devices were fabricated on stainless steel (SS) substrates with an inverted structure, and the optoelectronic performance was characterized using spectral response and dark and light current-voltage (I-V) measurements. It was found that annealing the n-Cu2O ESTL improved the photon absorption in the short wavelength region, resulting in a significant increase in the device performance.
JOURNAL OF THE NATIONAL SCIENCE FOUNDATION OF SRI LANKA
(2023)
Article
Psychology, Applied
Rebecca M. Paluch, Vanessa Shum
Summary: In response to calls for greater diversity, equity, and inclusion in the workplace, organizations have implemented a DEI leadership role. This study explores the expectations and perceptions of DEI leaders, finding that they are generally assumed to be non-White and that traits associated with non-White groups are perceived to align more strongly with the role. The study also reveals that non-White candidates are evaluated more positively for a DEI leader role, mediated by nontraditional, role-specific traits.
JOURNAL OF APPLIED PSYCHOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Urvashi Bothra, Miguel Albaladejo-Siguan, Yana Vaynzof, Dinesh Kabra
Summary: Solution-processed lead sulfide quantum dots (PbS QDs) are an excellent candidate for photodetector applications due to their broadband absorption, tuneable bandgaps, high stability, and flexibility. This study investigates the effect of traps on the performance of PbS QD photodetectors fabricated using different ligands. The results indicate that lead halide ligands yield the best devices with low dark current density and high detectivity.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Olha Aftenieva, Julius Brunner, Mohammad Adnan, Swagato Sarkar, Andreas Fery, Yana Vaynzof, Tobias A. F. Koenig
Summary: We use a simple grating configuration to direct and amplify the omnidirectional emission of perovskite nanocrystals. By using a soft lithographic printing process, we can reliably structure perovskite nanocrystals into light-emitting metasurfaces with high contrast on a large area. Our self-assembly process allows for scalable fabrication of gratings with predefined periodicities and tunable optical properties.
Article
Chemistry, Physical
Dou Luo, Zhengyan Jiang, Wen Liang Tan, Lifu Zhang, Lanqing Li, Chengwei Shan, Christopher R. McNeill, Prashant Sonar, Baomin Xu, Aung Ko Ko Kyaw
Summary: This study demonstrates the construction of highly efficient ternary organic solar cells (OSCs) based on blending two non-fused ring electron acceptors (NFREAs) with a donor. The ternary system exhibits improved charge transfer efficiency due to the alloy-like phase formed by the two NFREAs, as well as increased current and voltage resulting from complementary absorption spectra and energy transfer. Vertical phase separation further enhances the performance of the OSCs.
ADVANCED ENERGY MATERIALS
(2023)
Article
Polymer Science
Doan Vu, Wen Liang Tan, Lu He, Alexander Ehm, Dietrich R. T. Zahn, Christopher R. McNeill
Summary: We report the discovery of a third crystalline polymorph of the electron-transporting conjugated polymer P(NDI2OD-T2), called form III, which exhibits an end-on texture. This new polymorph is characterized by the incorporation of two monomer units along the backbone-stacking direction, resulting in a doubling of the unit cell c axis. The formation of form III crystallites is achieved by melt annealing a thin film followed by slow cooling. Analysis using grazing-incidence wide-angle X-ray scattering (GIWAXS) and peak simulation confirms the unique packing of this polymorph. This discovery presents an exciting opportunity to study the structure/function relationships of this important semiconducting polymer.
Editorial Material
Materials Science, Multidisciplinary
Zhuoying Chen, Dinesh Kabra, Yana Vaynzof
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Physical
Miguel Albaladejo-Siguan, Anatol Prudnikau, Alina Senina, Elizabeth C. Baird, Yvonne J. Hofstetter, Julius Brunner, Juanzi Shi, Yana Vaynzof, Fabian Paulus
Summary: The synthesis of metal sulfide nanocrystals is essential for quantum dot (QD) photovoltaics. The control over QD size allows for precise tuning of optical and electronic properties, making them suitable for various electronic applications. A new air-stable sulfur precursor, bis(stearoyl) sulfide (St(2)S), is introduced for sulfide-based QD synthesis, resulting in uniform and stable nanocrystals. Photovoltaic devices based on St(2)S-synthesized QDs exhibit comparable efficiency to those using the toxic, air- and moisture-sensitive sulfur source (TMS)(2)S, but have improved operational stability.
ADVANCED ENERGY MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Andreas Erhardt, Adrian Hochgesang, Christopher R. McNeill, Mukundan Thelakkat
Summary: This article introduces the copolymerization of classical acceptor motifs diketopyrrolopyrrole (DPP) and thienopyrrolodione (TPD) to produce the acceptor-acceptor polymer Poly(DPP-TPD). The goal is to enhance electron affinity (EA) and ensure stability and ion compatibility by incorporating hydrophilic oligoethylene glycol N-substituents. The study demonstrates the suitability of the polymer for n-type organic electrochemical transistor (OECT) devices, with high EA, ionization potential, and electron mobility.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Energy & Fuels
Xin Li, Chengyi Xiao, Zhaofan Yang, Hao Wang, Baiqiao Liu, Wen Liang Tan, Qiaomei Chen, Chao Wang, Christopher R. McNeill, Weiwei Li
Summary: In this study, three double-cable conjugated polymers were developed for indoor single-component organic solar cells (SCOSCs). The new polymers have pendent nonfused electron acceptors with A-pi-D-pi-A configuration, using 1H-indene-1,3(2H)-dione (ID) as an electron-withdrawing end group in group A. These polymers show absorption spectra in the range of 400-700 nm, matching the spectra of indoor LED lights. Additionally, the introduction of ID units and halogen atoms enables the polymers to exhibit high photovoltage (>1.0 V) in SCOSCs, resulting in a high efficiency of 18% under indoor light illumination. This research provides a novel modular design approach for wide-bandgap double-cable conjugated polymers that can be used for indoor photovoltaics.
Article
Nanoscience & Nanotechnology
Jing Li, Rene Huebner, Marielle Deconinck, Ankita Bora, Markus Goebel, Dana Schwarz, Guangbo Chen, Guangzhao Wang, Shengyuan A. Yang, Yana Vaynzof, Vladimir Lesnyak
Summary: In this study, a method for efficiently synthesizing alloyed Re x Mo1-x S2 nanoflakes with enlarged interlayer distance was reported, among which Re0.55Mo0.45S2 exhibited excellent catalytic performance. Density functional theory calculations proved that enlarging the distance between layers in the Re x Mo1-x S2 alloy can greatly improve its catalytic performance. This research paves the way for designing advanced transition metal dichalcogenide-based catalysts for hydrogen evolution and promoting their large-scale practical application.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Zongbao Zhang, Ran Ji, Xiangkun Jia, Shu-Jen Wang, Marielle Deconinck, Elena Siliavka, Yana Vaynzof
Summary: This study demonstrates the successful fabrication of compact ultra-thin CsPbI3 perovskite films using a co-evaporation process. The films with a thickness of 10 nm exhibit high power conversion efficiency in a device structure of glass/ITO/PTAA/perovskite/PCBM/BCP/Al/Ag.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Lucas Scalon, Julius Brunner, Maria Gabriella Detone Guaita, Rodrigo Szostak, Miguel Albaladejo-Siguan, Tim Kodalle, L. Andres Guerrero-Leon, Carolin M. Sutter-Fella, Caio C. Oliveira, Yana Vaynzof, Ana Flavia Nogueira
Summary: The introduction of chiral organic spacers in low-dimensional metal-halide perovskites leads to chiroptical activity, which is attractive for spintronic applications. However, there is still a lack of comprehensive understanding regarding the formation of structure and the ability to control phase purity in such materials. This study explores the impact of processing conditions on the phase purity, microstructure, and chiroptical properties of chiral 2D perovskites. The anisotropic emergence of a 1D perovskite inside the 2D matrix and its dependence on the organic cation chirality, solvent, and thermal annealing conditions are demonstrated.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Shraddha M. Rao, Alexander Kiligaridis, Aymen Yangui, Qingzhi An, Yana Vaynzof, Ivan G. Scheblykin
Summary: Defects in metal halide perovskites (MHP) exhibit photosensitivity, causing the observer effect in laser spectroscopy. The creation and healing of defects lead to transient phenomena such as photoluminescence (PL) bleaching and enhancement. The use of the dependence of PL quantum yield (PLQY) on laser pulse repetition rate and pulse fluence as a unique fingerprint of charge carrier dynamics and defect evolution is demonstrated. Automatic PLQY mapping can be used as a universal method for assessing the quality of perovskite samples.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Energy & Fuels
Yahui Tang, Wen Liang Tan, Zhuping Fei, Martin Heeney, Christopher R. Mcneill
Summary: In order to understand the limitations of open-circuit voltage in organic solar cells, the energy levels of neat donor and acceptor samples are often characterized, but this may not reflect the energy levels at the donor:acceptor interface in blends. Organic semiconductors, especially non-fullerene acceptors, are sensitive to microstructural changes in thin films. This study investigates the differences in molecular packing between neat and blend films using temperature-dependent current-voltage measurements. The results show that the interfacial energy levels differ for different systems, highlighting the importance of considering microstructure-dependent differences when studying energy losses in non-fullerene acceptor organic solar cells.
Article
Chemistry, Multidisciplinary
Martina Rimmele, Zhuoran Qiao, Julianna Panidi, Francesco Furlan, Chulyeon Lee, Wen Liang Tan, Christopher R. McNeill, Youngkyoo Kim, Nicola Gasparini, Martin Heeney
Summary: The dramatic improvement of the PCE of organic photovoltaic devices has been driven by the development of new polymer donor materials and non-fullerene acceptors. A new approach was reported to introduce various solubilizing groups into a benzo[c][1,2,5]thiadiazole acceptor comonomer, allowing for the preparation of a library of donor polymers for rapid screening of properties and performance. The donor polymer FO6-T emerged as the optimal material, exhibiting good solubility and achieving high PCE, making it suitable for large-scale applications.
MATERIALS HORIZONS
(2023)
Article
Chemistry, Multidisciplinary
Dongdong Xia, Shengxi Zhou, Wen Liang Tan, Safakath Karuthedath, Chengyi Xiao, Chaowei Zhao, Frederic Laquai, Christopher R. McNeill, Weiwei Li
Summary: In this work, the preferential end-on orientation was obtained for the first time in a conjugated molecular dyad. The molecular orientation was shifted by introducing a fused-ring structure, resulting in higher charge carrier mobilities and better power conversion efficiency in organic solar cells.