Article
Chemistry, Multidisciplinary
Xiaoxiao Li, Xueting Li, Tingting Xia, Wei Chen, Kenneth J. Shea, Xihua Lu
Summary: It is discovered that introducing hydrophobic N-tert-butylacrylamide (TBA) with large sterically hindering side groups can slow down the dehydration of hydrophobic alkyl groups in PNIPAm-based nanogels, resulting in thermally induced sol-gel transition above the phase transition temperature (T-p). Furthermore, the introduction of N-acrylamido-L-phenylalanine (APhe) monomer with a strongly water-absorbing carboxyl group and larger steric hindrance can self-assemble PNIPAm/TBA/APhe terpolymer nanogels into colorful colloidal crystals that undergo sol-gel transition above T-p.
MATERIALS HORIZONS
(2023)
Article
Chemistry, Physical
Mingshan Han, Qinqin Zhou, Meng Zhang, Jinshu Wang, Fangyan Cui, Yunfei Yang, Jingwen Su, Weiwei Huang, Yuxiang Hu
Summary: Rechargeable aluminum batteries (RABs) with high energy-to-price ratios can be improved by using a structure-rotatable cathode (quinone-based calix[4]quinone (C4Q)) to overcome the limitations caused by large-size active ions, such as steric hindrance and sluggish ion-diffusion kinetics. The C4Q cathode shows high energy density, enhanced rate capacity, and long-term stability in RABs, making it a promising option for high-performance RABs. The reaction mechanism of the rotatable cathode is also revealed through characterization studies and DFT simulations.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Junjie Cui, Jung-Hwa Park, Dong Won Kim, Min-Woo Choi, Hae Yeon Chung, Oh Kyu Kwon, Ji Eon Kwon, Soo Young Park
Summary: This study introduces oligo(ethylene glycol) (OEG) side chains into non-fullerene acceptors to increase their dielectric constant, resulting in improved photovoltaic performance and higher charge mobility balance. The fabricated NIDCS-EO3 devices exhibit higher efficiency and versatility compared to NIDCS-HO devices, showcasing potential for enhanced organic solar cell technology.
CHEMISTRY-AN ASIAN JOURNAL
(2021)
Article
Chemistry, Physical
Ming-Yang Li, Yi-Qi Pan, Guang-Yan Sun, Yun Geng
Summary: This study investigates the influence of introducing a third component (D-2) in ternary organic solar cells (T-OSCs) on the charge transfer mechanism. The results indicate that factors such as molecular weight and oscillator strength of D-2 affect the selection of charge transfer pathways, providing important insights for improving the efficiency of T-OSCs.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Applied
Wuqi Li, Marwa Abd-Ellah, Haitao Liu, Xu Li, Zhaoyi Yin, Pankaj Kumar, Jinliang Wang, Yuning Li
Summary: The newly designed and synthesized PBDTTI and PBDTTIF polymers, with strong electron accepting indolin-2-one side chains, can achieve low HOMO energy levels, providing high open circuit voltage for resulting OSCs. When used as donors with a small bandgap non-fullerene acceptor ITIC, the resulting OSCs devices show promising power conversion efficiencies.
Article
Materials Science, Multidisciplinary
Na Gyeong An, Ji Eun Lee, Woojin Lee, Dohun Yuk, Seyeong Song, Chanjie Wang, Soon-Ki Kwon, Yun-Hi Kim, Jin Young Kim
Summary: Organic photovoltaics (OPVs) are considered as a promising energy source for indoor internet of things devices. Halogen-free solvent processing and the deliberate design of wide band gap non-fullerene acceptors (NFAs) are required to demonstrate the feasibility and environmental compatibility of indoor OPVs. In this study, two NFAs were designed and blended with a polymer donor to achieve photoactive layers with absorption spectra similar to indoor light sources. The use of non-halogenated solvents resulted in competitive power conversion efficiencies (PCEs) compared to halogenated solvents. The best-performing binary material system based IOPVs processed from a non-halogen solvent mixture achieved a PCE of 22.38%.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Physical
Shufang Li, Changzhou Shi, Yuxia Gong, Ke Yang, Xiaoyan Luo, Lihui Jiang, Haiming Zhu, Xinhui Lu, Jun Yuan, Yingping Zou
Summary: This study presents the use of a pseudo-bilayer bulk heterojunction strategy to optimize the active layer morphology in ternary organic solar cells. The resulting PBHJ device exhibits enhanced charge generation, extended exciton lifetime, reduced charge recombination, and improved stability compared to other device structures.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Zhifa Liu, Johanna Siekmann, Benjamin Klingebiel, Uwe Rau, Thomas Kirchartz
Summary: Efforts to improve the efficiency of wide bandgap perovskite solar cells include minimizing nonradiative recombination pathways, optimizing interfaces and energy level alignment, as well as tuning the molecular orbitals of electron transport layers. By optimizing these factors, higher open-circuit voltages and power conversion efficiencies can be achieved.
ADVANCED ENERGY MATERIALS
(2021)
Article
Energy & Fuels
Qiuchen Lu, Qungui Wang, Peng Song, Fengcai Ma, Yanhui Yang, Yuanzuo Li
Summary: The study investigates the effect of doping a medium bandgap polymer into traditional binary heterojunction solar cells for ternary solar cells. Simulation and global modeling reveal the competition mechanism of electron transfer and evaluate crucial parameters, showing that doping different bandgap polymers can enhance electron transfer and improve key performance indicators of ternary solar cells.
Article
Chemistry, Physical
Wenlin Jiang, Zhibing Tan, Renad Almughathawi, Qingqing Wu, Zitong Liu, Junyang Liu, Songjun Hou, Guanxin Zhang, Colin J. Lambert, Wenjing Hong, Deqing Zhang
Summary: The experimental investigation explores the impact of side chains on intra-molecular conductance in pi-conjugated molecules. It is found that longer branching alkyl chains lead to reduced molecular conductance due to increased torsional angles between aromatic rings and reduced planarity of the molecules. This work highlights the importance of considering the role of insulating side chains in the design of future organic semiconducting materials.
Article
Polymer Science
Kun Zhu, Xiangkun Wang, Yan He, Xiaohua Zhai, Caiyun Gao, Quanliang Wang, Xin Jing, Liangmin Yu, Mingliang Sun
Summary: Our study found that ternary strategy can enhance photovoltaic parameters by choosing appropriate fullerene and non-fullerene acceptors, resulting in improved performance in terms of open-circuit voltage, power conversion efficiency, fill factor, and overall efficiency.
Article
Materials Science, Multidisciplinary
Muhammad Naeem Shah, Muhammad Fahim Shah, Junxian Ma, Muhammad Ijaz Shah, Yatao Yang, Xiaofang Pan
Summary: The ternary approach in organic solar cells involves combining different donors to improve device performance. By adding a molecular donor, the morphology of the active layer and hole mobility can be enhanced, while complementary absorption of different donors contributes to improved performance.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Yue Wang, Fangfang Wang, Jinhua Gao, Yutong Yan, Xuelin Wang, Xulai Wang, Chunyu Xu, Xiaoling Ma, Jian Zhang, Fujun Zhang
Summary: This study demonstrates the importance of over 200 nm thickness of active layers for efficient organic photovoltaics, with ternary thick-film OPVs showing improved performance due to optimized molecular arrangement and phase separation leading to significantly improved fill factors.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Physical
Wei Tang, Wenhong Peng, Mengbing Zhu, Huanxiang Jiang, Wenchao Wang, Hao Xia, Renqiang Yang, Olle Inganas, Hua Tan, Qingzhen Bian, Ergang Wang, Weiguo Zhu
Summary: The study introduced a small molecule donor with a higher HOMO level and better compatibility with the acceptor, effectively improving the open-circuit voltage (Voc) and power conversion efficiency (PCE) for ternary OSCs. The addition of TiC12 in the ternary devices led to reduced disorder and nonradiative energy loss, resulting in an increased Voc.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Physics, Multidisciplinary
Arighna Basak, Arpan Deyasi, Angsuman Sarkar
Summary: This manuscript introduces an Asymmetric Junctionless Dual Material Double Gate MOSFET (AJDMDG MOSFET) biosensor that exhibits improved sensitivity for both threshold voltage and ON-current. By utilizing both neutral and charged biomolecules, the device is constructed with high-K dielectric material. The threshold voltage is calculated by solving the 2D Poisson's equation and analyzing the minimal surface potential under realistic boundary circumstances, with good agreement between analytical and TCAD simulation results. The drain current sensitivity, along with a higher ON-to-OFF current ratio, is theoretically estimated and compared with identical DGFET architecture, showcasing significant improvement for various step patterns when considering steric hinderance for moderately filled cavities, enabling the detection of labeled and label-free electrical species at lower concentrations.
Article
Chemistry, Multidisciplinary
Min Deng, Xiaopeng Xu, Yuwei Duan, Liyang Yu, Ruipeng Li, Qiang Peng
Summary: It is discovered that blending compounds with unique 2D EDOT side chains with PM6 can result in higher solar cell efficiency. Furthermore, the addition of BTP-EDOT-4F in PM6:L8-BO binary system forms ternary blends, optimizing crystallinity, compatibility, and morphology, leading to higher short circuit current density and fill factor. Finally, an outstanding power conversion efficiency of 18.56% is achieved in ternary blends containing PM6, L8-BO, and BTP-EDOT-4F.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Zhijun Li, Meizi Wu, Lu Yang, Kunpeng Guo, Yuwei Duan, Yong Li, Kun He, Yifan Xing, Zheng Zhang, Hui Zhou, Dongfang Xu, Jungang Wang, Hong Zou, Da Li, Zhike Liu
Summary: High density of defects at the interface greatly affects the performance of perovskite solar cells (PSCs). In this study, a hinge-type fluorine-rich complex, cobalt (II) hexafluoro-2,4-pentanedionate (CoFAc), is introduced onto the surface of formamidinium cesium lead iodide (FACsPbI(3)) film to address the issues related to the perovskite/Spiro-OMeTAD interface. CoFAc passivates vacancies in the organic cation and halide anion by forming strong hydrogen bonds with HC(NH2)(2)(+) (FA(+)) and strong ionic bonds with Pb2+ in the perovskite film. Additionally, CoFAc improves interfacial hole-transport kinetics by interacting with Spiro-OMeTAD. As a result, FACsPbI(3) PSCs with CoFAc modification demonstrate a record power conversion efficiency (PCE) of 24.64% and an impressive open-circuit voltage (V-OC) of 1.191 V, the highest reported V-OC among all organic-inorganic hybrid PSCs with TiO2 as the electron transport layer. Furthermore, CoFAc-modified devices exhibit exceptional long-term stability, retaining 95% of their initial PCE after exposure to ambient atmosphere for 1500 hours without any encapsulation.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Lu Yang, Hui Zhou, Yuwei Duan, Meizi Wu, Kun He, Yong Li, Dongfang Xu, Hong Zou, Shaoming Yang, Zhimin Fang, Shengzhong Liu, Zhike Liu
Summary: Judicious tailoring of the SnO2/perovskite interface using DL-dimer passivation can significantly improve the efficiency and stability of perovskite solar cells. The DL-dimer provides better passivation of defects in both the SnO2 and perovskite films, resulting in improved quality of the perovskite film. The DL-treated device achieves an impressive V-OC of 1.20V and a PCE of 25.24%, which is a record value among all reported PSCs.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Mingwei Zhou, Chentong Liao, Yuwei Duan, Xiaopeng Xu, Liyang Yu, Ruipeng Li, Qiang Peng
Summary: In this study, a new method of using conjugated polymers as additives to optimize the morphology of layer-by-layer organic solar cells (LbL-OSCs) is reported. By optimizing the morphology through side chain engineering, the addition of P-Cl as an additive facilitates the penetration of BTP-eC9 and forms an intertwined D/A network, leading to improved charge separation and collection efficiency. The optimized morphology significantly contributes to the photovoltaic performances of LbL-OSCs.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jungang Wang, Yuhang Che, Yuwei Duan, Zhike Liu, Shaomin Yang, Dongfang Xu, Zhimin Fang, Xuruo Lei, Yong Li, Shengzhong (Frank) Liu
Summary: It is found that using a compound called DED can effectively reduce defects in CsPbI3 films and suppress ion migration, thereby improving the performance and stability of perovskite solar cells. Experimental results show that CsPbI3 cells treated with DED exhibit excellent performance, with a champion PCE of 21.15%.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Hong Zou, Yuwei Duan, Shaomin Yang, Dongfang Xu, Lu Yang, Jian Cui, Hui Zhou, Meizi Wu, Jungang Wang, Xuruo Lei, Na Zhang, Zhike Liu
Summary: This study introduces a new approach to improve the performance of CsPbI3 perovskite solar cells by depositing a new zwitterion ion at the interface between the electron transporting layer and perovskite layer. The zwitterion ions can effectively passivate defects and improve the band alignment, resulting in a significant increase in power conversion efficiency.
Article
Chemistry, Physical
Hui Zhou, Lu Yang, Yuwei Duan, Meizi Wu, Yong Li, Dongfang Xu, Hong Zou, Jungang Wang, Shaomin Yang, Zhike Liu
Summary: Surmounting complicated defects at ETL and perovskite interface is crucial for enhancing efficiency and stability of PSCs. An asymmetric interface modification strategy (AIMS) is developed, incorporating 1,3-thiazole-2,4-diammonium (TDA), to passivate defects on both SnO2 ETL and perovskite buried surface. TDA with nitrogen atoms (N3 and N1) in the structure selectively cures different types of defects, resulting in a champion PCE of 24.96% and remarkable operational stability.
ADVANCED ENERGY MATERIALS
(2023)
Review
Nanoscience & Nanotechnology
Ting Nie, Zhimin Fang, Xiaodong Ren, Yuwei Duan, Shengzhong (Frank) Liu
Summary: Perovskite-based tandem solar cells have attracted increasing interest due to their potential to surpass the Shockley-Queisser limit for single-junction solar cells. Wide-bandgap perovskites act as front absorbers in tandem architectures, offering higher open-circuit voltage and reduced thermalization losses. The main challenges for wide-bandgap perovskite solar cells (PSCs) include large open-circuit voltage deficit and severe photo-induced phase separation. Recent research efforts have made significant progress in addressing these issues and improving the efficiency and stability of wide-bandgap PSCs for tandem applications.
NANO-MICRO LETTERS
(2023)
Review
Materials Science, Multidisciplinary
Zhimin Fang, Ting Nie, Nan Yan, Jing Zhang, Xiaodong Ren, Xu Guo, Yuwei Duan, Jiangshan Feng, Shengzhong Frank Liu
Summary: Developing perovskite-based tandem solar cells is a promising technique to surpass the limit of single-junction solar cells. This review summarizes the recent progress of charge transport materials for different types of perovskite-based tandem solar cells and discusses their influence on device performance. It provides effective guidance for device design.
SCIENCE CHINA-MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Dongfang Xu, Jungang Wang, Yuwei Duan, Shaomin Yang, Hong Zou, Lu Yang, Na Zhang, Hui Zhou, Xuruo Lei, Meizi Wu, Shengzhong Liu, Zhike Liu
Summary: A bifacial defect passivator, 4-amino-2,3,5,6-tetrafluorobenzoate cesium (ATFC), is designed to optimize the perovskite/TiO2 interface in CsPbI3 perovskite solar cells (PSCs). ATFC can improve the conductivity, electron mobility, and energy band structure of the TiO2 layer, enhance the quality of CsPbI3 film, and limit the migration of I- ions. The ATFC-modified CsPbI3 device achieves a champion power conversion efficiency of 21.11% and excellent stability.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Na Zhang, Jungang Wang, Yuwei Duan, Shaomin Yang, Dongfang Xu, Xuruo Lei, Meizi Wu, Ningyi Yuan, Jianning Ding, Jian Cui, Zhike Liu
Summary: In this study, a sacrificing dye (RBITC) was developed to regulate the growth of perovskite film by releasing ethylammonium cations, isothiocyanate anions, and benzoic acid molecules. This technique improved the quality of perovskite films and achieved high open circuit voltage and power conversion efficiency in CsPbI3 perovskite solar cells. The results provide an efficient chemical strategy to regulate the formation of perovskite films for high-performance all-inorganic PSCs.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Hairui Bai, Ruijie Ma, Wenyan Su, Top Archie Dela Pena, Tengfei Li, Lingxiao Tang, Jie Yang, Bin Hu, Yilin Wang, Zhaozhao Bi, Yueling Su, Qi Wei, Qiang Wu, Yuwei Duan, Yuxiang Li, Jiaying Wu, Zicheng Ding, Xunfan Liao, Yinjuan Huang, Chao Gao, Guanghao Lu, Mingjie Li, Weiguo Zhu, Gang Li, Qunping Fan, Wei Ma
Summary: A series of N-alkyl-tailored small molecule acceptors were developed to optimize the active layer morphology and power conversion efficiency of organic solar cells. The blade-coating OSCs fabricated from a green-solvent achieved a record-high PCE of nearly 19%.
NANO-MICRO LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Yuwei Duan, Jungang Wang, Dongfang Xu, Peigen Ji, Hui Zhou, Yong Li, Shaoming Yang, Zhuang Xie, Xiaohu Hai, Xuruo Lei, Rui Sun, Zihao Fan, Ke Zhang, Shengzhong Liu, Zhike Liu
Summary: In this study, an effective redox agent was developed to simultaneously stabilize the cesium lead triiodide precursor solution and passivate defects in the perovskite film. This method achieves highly stable and efficient cesium lead triiodide perovskite solar cells.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yiyan Ran, Chengxu Liang, Zhihao Xu, Wenwen Jing, Xiaopeng Xu, Yuwei Duan, Ruipeng Li, Liyang Yu, Qiang Peng
Summary: This study reports the programmed fluorination and/or bromination on the benzene core to develop efficient additives for organic solar cells (OSCs). The combination of fluoride and bromide atoms on the additives leads to more appropriate melting/boiling points, volatility, and stronger molecular interactions with the host blend, resulting in higher ordered molecular packing and improved morphology. The developed additive, 1,3,5-tribromo-2,4,6-trifluorobenzene (TFTB), shows good universality and high power conversion efficiency in various blend systems, achieving an impressive PCE of 19.43% in a ternary blend system.
ADVANCED FUNCTIONAL MATERIALS
(2023)
