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| 1 | An A-D-A′-D-A type unfused nonfullerene acceptor for organic solar cells with approaching 14%efficiency显示文摘In recent years,power conversion efficiency(PCE)of organic solar cells(OSCs)has made significant improvement.A large number of studies were reported to achieve high PCEs through exploring new active layer materials,especially the high efficiency fused ring acceptors(FRAs).Compared with FRAs,another type of so-called unfused-ring acceptors(UFAs),possessing some advantages such as simple synthesis and low cost,have attracted a lot of attention.Herein,a new UFA BTzO-4F,incorporating with a benzotriazole moiety and S···O intramolecular noncovalent interactions,has been successfully synthesized.The photovoltaic device based on PBDB-T:BTzO-4F achieved a record PCE of 13.8%for UFAs,which indicates that introducing the benzotriazole moiety is an effective strategy for high quality acceptors.Thus,these findings of this work demonstrate the great potential of UFAs for high performance OSCs. | Xingzheng Liu Yanan Wei Xin Zhang Linqing Qin Zhixiang Wei Hui Huang | 2021 | Science China Chemistry2021，64，2： | 7 |
| 2 | Sort-based relay selection algorithm for decode-and-forward relay system显示文摘In this paper, a sort-based relay selection algorithm is proposed for decode-and-forward wireless relay systems. The proposed algorithm can reduce computational complexity and system overhead in the relay selection for practical decode-and-forward wireless relay systems with multiple sources and multiple relays. This would be a very important improvement. Firstly, the sufficient and necessary conditions for a relay to be feasible to a source are derived. By adopting relay transmission via its feasible relay, the source can improve channel capacity compared to direct transmission. Then, a sort-based relay selection algorithm is proposed based on the sufficient and necessary conditions. In the proposed algorithm, each relay makes decision on its feasibility individually, but the final source-relay paring decision is made in a centralized manner. Simulation results show that the proposed algorithm can provide considerable system performance improvement over the existing algorithm. Especially at low signal-to-noise (SNR) region, the performance of the proposed algorithm almost reaches the optimal one. | XIE Gang LIU YuanAn GAO JinChun LI XingZheng | 2013 | Science China(Information Sciences)2013，56，2： | 1 |
| 3 | Low-cost polymer acceptors with noncovalently fused-ring backbones for efficient all-polymer solar cells显示文摘The polymerization of fused-ring acceptors(FRAs) to afford their corresponding polymeric acceptors for high-performance all-polymer solar cells(all-PSCs) has achieved remarkable progress in the past few years.However,due to the high degree of synthetic complexity for the monomer,the high-cost of these polymeric acceptors may limit their commercial applications.Thus,it is urgent to develop inexpensive and high-performance polymeric acceptors for all-PSCs.Herein,two novel polymeric acceptors(PBTzO and PBTzO-2F) have been designed and synthesized by copolymerization of noncovalently fused ring acceptors(NFRAs),which were employed in all-PSCs for the first time.Upon introducing the “noncovalently conformational locks(NoCLs)” in the backbone and selective fluorination of the end-group,photophysical and electrical properties,and solidstate packing properties of the NFRAs have been rationally tuned.As a result,the PBDB-T:PBTzO-2F based devices presented an excellent power conversion efficiency(PCE) of 11.04%,much higher than that of PBTzO based ones due to the increased charge generation and extraction,improved hole transfer and carrier mobilities,and reduced energy loss.More importantly,PBTzO-2F exhibited a much lower synthetic complexity(SC) index and higher figure-of-merit(FOM) values than the high-performance fused-ring acceptor based polymer acceptors(FRA-PAs) due to the simpler structures and more effective synthesis.This contribution provided a novel idea to achieve low-cost and high-performance all-PSCs. | Xiaobin Gu Yanan Wei Xingzheng Liu Na Yu Laiyang Li Ziyang Han Jinhua Gao Congqi Li Zhixiang Wei Zheng Tang Xin Zhang Hui Huang | 2022 | Science China Chemistry2022，65，5： | 1 |
| 4 | Effort Levels of Capital-constrained Retailer under Bank Financing显示文摘In a supply chain with a retailer confronted with financial constraints,impacts on profits of the supply chain can be alleviated by increasing the retailer's efforts and market demand through external financing( bank). If the cost of bank lending is not very high,the capitalconstrained retailer can borrow money and make efforts. The reduction of bank interest rates,however,increases the retailer's efforts. We prove that there is a unique equilibrium point between the retailers. We find out the optimal interest rate of the bank and the optimal efforts by the retailer through numerical analysis and verify validity of the results. | Xiaojing LIU Xingzheng AI Xiaowo TANG | 2015 | Asian Agricultural Research2015，7，12： | 0 |
| 5 | High-gravity technology intensified Knoevenagel condensation-Michael addition polymerization of poly (ethylene glycol)-poly (n-butyl cyanoacrylate) for blood-brain barrier delivery显示文摘Poly(ethylene glycol)-poly(n-butyl cyanoacrylate)(PEG-PBCA)is a remarkable drug delivery carrier for permeating blood-brain barrier.In this work,a novel high-gravity procedure was reported to intensify Knoevenagel condensation-Michael addition polymerization of PEG-PBCA.A series of PEG-PBCA containing different block ratios were synthesized with narrow molecular weight distribution of polydispersity indexes less than 1.1.Furthermore,the reaction time reduced 60%compared to conventional stirred tank reactor process.Chemical structures of as-prepared polymers were characterized.In vitro drug delivery performance was evaluated.The cytotoxicity of PEG-PBCA to brain microvessel endothelial cells(BMVEC)decreases with the extension of the PEG chain and the shortening of the PBCA chain.The polymer cellular uptake to BMVECs was better after improving hydrophilicity by PEG block.Results of bloodbrain barrier permeability demonstrated that medium length of PBCA chain and short PEG chain are favorable for hydrophobic Nile red permeation,while long PEG chain and short PBCA chain are beneficial to delivery water-soluble doxorubicin hydrochloride(Dox).The average apparent permeability coeffi-cient increased 1.7 and 0.25 times than that of raw Nile red and Dox,respectively.High-gravity intensi-fied condensation polymerization should have great potential in brain drug delivery system. | Xingzheng Liu Chuanbo Fu Manting Wang Jiexin Wang Haikui Zou Yuan Le Jianfeng Chen | 2022 | Chinese Journal of Chemical Engineering2022，35，6： | 0 |
| 6 | FMO3 deficiency of duck leads to decreased lipid deposition and increased antibacterial activity显示文摘Background:Most duck eggs possess a fishy odor,indicating that ducks generally exhibit impaired trimethylamine(TMA)metabolism.TMA accumulation is responsible for this unpleasant odor,and TMA metabolism plays an essen-tial role in trimethylaminuria(TMAU),also known as fish odor syndrome.In this study,we focused on the unusual TMA metabolism mechanism in ducks,and further explored the unclear reasons leading to the debilitating TMA metabolism.Methods:To achieve this,transcriptome,proteome,and metagenome analyses were first integrated based on the constructed duck populations with high and low TMA metabolism abilities.Additionally,further experiments were conducted to validate the hypothesis regarding the limited flavin-containing monooxygenase 3(FMO3)metabolism ability of ducks.Results:The study demonstrated that liver FMO3 and cecal microbes,including Akkermansia and Mucispirillum,par-ticipated in TMA metabolism in ducks.The limited oxidation ability of FMO3 explains the weakening of TMA metabo-lism in ducks.Nevertheless,it decreases lipid deposition and increases antibacterial activity,contributing to its survival and reproduction during the evolutionary adaptation process.Conclusions:This study demonstrated the function of FMO3 and intestinal microbes in regulating TMA metabolism and illustrated the biological significance of FMO3 impairment in ducks. | Xingzheng Li Jianlou Song Xuefeng Shi Mingyi Huang Lei Liu Guoqiang Yi Ning Yang Guiyun Xu Jiangxia Zheng | 2023 | Journal of Animal Science and Biotechnology2023，14，2： | 0 |
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