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| 1 | Flexible ITO-free organic solar cells over 10% by employing drop-coated conductive PEDOT:PSS transparent anodes显示文摘Highly conductive poly(3,4-ethylenedioxythiophene):poly(styrene-sulfonic acid)(PEDOT:PSS) has been explored to fabricate flexible and stretchable conductors. Generally, PEDOT:PSS transparent anodes are prepared by spin-coating method. In this article, we adopt a method by dropping PEDOT:PSS aqueous solution on the PET plastic substrate to fabricate flexible electrodes. Compared with spin coating, drop-coating is simple and cost-effective with large-area fabrications. Through this method, we fabricated highly transparent conductive electrodes and systematically studied their electrical, optical, morphological and mechanical properties. With dimethyl sulfoxide/methanesulfonic acid(DMSO/MSA) treated PEDOT:PSS electrode,bendable devices based on non-fullerene system displayed an open-circuit voltage of 0.925 V, a fill factor of 70.74%, and a high power conversion efficiency(PCE) of 10.23% under 100 mW cm^(-2) illumination, which retained over 80% of the initial PCE value after 1000 bending cycles. Based on the findings, drop-coated PEDOT:PSS electrodes exhibited high suitability for the development of large-area and high-efficiency printed solar cell modules in the future. | Huiqin Cui Wei Song Billy Fanady Ruixiang Peng Jianfeng Zhang Jiaming Huang Ziyi Ge | 2019 | Science China Chemistry2019，62，4： | 3 |
| 2 | Recent progress in perovskite solar cells:material science显示文摘Perovskite solar cells represent a promising third-generation photovoltaic technology with low fabrication cost and high power conversion efficiency.In light of the rapid development of perovskite materials and devices,a systematic survey on the latest advancements covering a broad range of related work is urgently needed.This review summarizes the recent major advances in the research of perovskite solar cells from a material science perspective.The discussed topics include the devices based on different type of perovskites(organic-inorganic hybrid,all-inorganic,and lead-free perovskite and perovskite quantum dots),the properties of perovskite defects,different type of charge transport materials(organic,polymeric,and inorganic hole transport materials and inorganic and organic electron transport materials),counter electrodes,and interfacial materials used to improve the efficiency and stability of devices.Most discussions focus on the key progresses reported within the recent five years.Meanwhile,the major issues limiting the production of perovskite solar cells and the prospects for the future development of related materials are discussed. | Jiang-Yang Shao Dongmei Li Jiangjian Shi Chuang Ma Yousheng Wang Xiaomin Liu Xianyuan Jiang Mengmeng Hao Luozheng Zhang Chang Liu Yiting Jiang Zhenhan Wang Yu-Wu Zhong Shengzhong(Frank)Liu Yaohua Mai Yongsheng Liu Yixin Zhao Zhijun Ning Lianzhou Wang Baomin Xu Lei Meng Zuqiang Bian Ziyi Ge Xiaowei Zhan Jingbi You Yongfang Li Qingbo Meng | 2023 | Science China Chemistry2023，66，1： | 3 |
| 3 | High efficiency ternary organic solar cells enabled by compatible dual-donor strategy with planar conjugated structures显示文摘Ternary organic solar cells(OSCs) have received extensive attention for improving the power conversion efficiency(PCE) of organic photovoltaics(OPVs). In this work, a novel donor material(ECTBD) consisting of benzodithiophene(BDT) central electron donor unit was developed and synthesized. The small molecular donor has the same central unit as PM6. The addition of ECTBD into PM6:Y6 system could improve the morphology of active blend layer. In addition, ECTBD showed good morphologically compatibility when blending with PM6:Y6 host, resulting in the improvement of fill factor and current density. As a result, the ternary devices based on PM6:ECTBD:Y6 ternary system achieved a highest PCE of 16.51% with fill factor of 76.24%, which was much higher than that of the binary devices(15.7%). Overall, this work provided an effective strategy to fabricate highly efficient ternary organic solar cells through design of the novel small molecular donor as the third component. | Sanhui Chen Tingting Yan Billy Fanady Wei Song Jinfeng Ge Qiang Wei Ruixiang Peng Guohui Chen Yingping Zou Ziyi Ge | 2020 | Science China Chemistry2020，63，7： | 2 |
| 4 | Synthesis and Characterization of Novel Fluorinated Polyimides Derived from I, 10 - his(4 - aminophenyl) 1 - (3 - trifluoromethylphenyl) - 2, 2, 2- trifluoroethane and Aromatic Dianhydrides显示文摘 | Ziyi Ge Lin Fan Shiyong Yang | 2008 | European Polymer Journal2008，，44： | 1 |
| 5 | Synthesis and properties of novel fluorinated epoxy resins显示文摘 | Ge Ziyi Tao Zhiqiang Lin Fan | 2011 | Journal of Applied Polymer Science2011，120，1： | 1 |
| 6 | Synthesis and characterization of novel soluble fluorinated aromatic polyamides derived from fluorinated isophthaloyl dichlorides and aromatic diamines显示文摘 | Ziyi Ge Shiyong Yang Zhiqiang Tao Jingang Liu Lin Fan | 2004 | Polymer2004，，11： | 1 |
| 7 | Synthesis andcharacterization of novel soluble fluorinated aromatic poly-amides derived from fluorinated isophthaloyl dichloridesand aromatic diamines 显示文摘 | Ge Ziyi Yang Shiyong Tao Zhiqiang | 2004 | Polymer2004，45，11： | 1 |
| 8 | Tree-ring δ^(15)N of Qinghai spruce in the central Qilian Mountains of China:Is pre-treatment of wood samples necessary?显示文摘A knowledge of the tree-ring stable nitrogen isotope ratio(δ^(15)N)can deepen our understanding of forest ecosystem dynamics by indicating the long-term availability,cycling and sources of nitrogen(N).However,the radial mobility of N blurs the interannual variations in the long-term N records.Previous studies of the chemical extraction of tree rings before analysis had produced inconsistent results and it is still unclear whether it is necessary to pre-treat wood samples from specific tree species to remove soluble N compounds before determining theδ^(15)N values.We compared the effects of pre-treatment with organic solvents and hot ultrapure water on the N concentration andδ^(15)N of tree rings from endemic Qinghai spruce(Picea crassifolia)growing in the interior of the central Qilian Mountains,China,during the last 60 a.We assessed the effects of different preparation protocols on the removal of the labile N compounds and investigated the need to pre-treat wood samples before determining theδ^(15)N values of tree rings.Increasing trends of the tree-ring N concentration were consistently observed in both the extracted and unextracted wood samples.The total N removed by extraction with organic solvents was about 17.60%,with a significantly higher amount in the sapwood section(P<0.01).Theδ^(15)N values of tree rings decreased consistently from 1960 to 2019 in both the extracted and unextracted wood samples.Extraction with organic solvents increased theδ^(15)N values markedly by about 5.2‰and reduced the variations in theδ^(15)N series.However,extraction with hot ultrapure water had little effect,with only a slight decrease in theδ^(15)N values of about 0.5‰.Our results showed that the radial pattern in the inter-ring movement of N in Qinghai spruce was not minimized by extraction with either organic solvents or hot ultrapure water.It is unnecessary to conduct hot ultrapure water extraction for the wood samples from Qinghai spruce because of its negligible effect on the removal of the labile N.Theδ^(15)N variation trend of tree rings in the unextracted wood samples was not influenced by the heartwood-sapwood transition zone.We suggest that theδ^(15)N values of the unextracted wood samples of the climate-sensitive Qinghai spruce could be used to explore the ecophysiological dynamics while focusing on the long-term variations. | WANG Ziyi LIU Xiaohong WANG Keyi ZENG Xiaomin ZHANG Yu GE Wensen KANG Huhu LU Qiangqiang | 2022 | Journal of Arid Land2022，14，6： | 1 |
| 9 | Enhanced efficiency in nondoped, blue organic light-emitting diodes utilizing si- multaneously local excition and two charge-transfer exciton from benzimidazole-based donor-acceptor molecules 显示文摘 | Ouyang Xinhua Zhang Xingye Ge Ziyi | 2014 | Dyes Pigments2014，103，： | 1 |
| 10 | Synthesis and characterization of novel soluble fluorinated aromatic poly- amides derived from fluorinated isophthaloyl dichlorides and aromatic diamines 显示文摘 | Ge Ziyi Yang Shiyong Tao Zhiqiang | 2004 | Polymer2004，45，11： | 1 |
| 11 | Improved phase stability of CsPbI2Br perovskite by released microstrain toward highly efficient and stable solar cells显示文摘All-inorganic perovskite solar cells(PSCs)have developed rapidly in the field of photovoltaics due to their excellent thermal and light stability.However,compared with organic–inorganic hybrid perovskites,the phase instability of inorganic perovskite under humidity still remains as a critical issue that ham-pers the commercialization of inorganic PSCs.We originally propose in this work that microstrains between the perovskite lattices/grains play a key role in affecting the phase stability of inorganic perovskite.To this end,we inno-vatively design theπ-conjugated p-type molecule bis(2-ethylhexyl)3,30((4,8-bis(5-(2-ethylhexyl)-3,4-difluorothiophen-2-yl)benzo[1,2-b:4,5-b0]dithiophene-2,6-di yl)bis(3,300-dioctyl[2,20:50,200-terthiophene]-500,5-diyl))(2E,20 E)-bis(2-cyanoacrylate)(BTEC-2F)to covalent with the Pb dangling bonds in CsPbI2Br perovskite film,which significantly suppress the trap states and release the defect-induced local stress between perovskite grains.The interplay between the microstrains and phase stability of the inorganic perovskite are scrutinized by a series of charac-terizations including x-ray photoelectron spectroscopy,photoluminescence,x-ray diffraction,scanning electron microscopy,and so forth,based on which,we conclude that weaker local stresses in the perovskite film engender superior phase stability by preventing the perovskite lattice distortion under humidity.By this rational design,PSCs based on CsPbI2Br perovskite system deliver an outstanding power conversion efficiency(PCE)up to 16.25%.The unencapsulated device also exhibits an exceptional moisture stability by retaining over 80%of the initial PCE after 500 h aging in ambient with relative humidity of(RH)25%. | Kanghui Zheng Jinfeng Ge Chang Liu Qiang Lou Xia Chen Yuanyuan Meng Xu Yin Shixiao Bu Cuirong Liu Ziyi Ge | 2021 | InfoMat2021，3，12： | 1 |
| 12 | Baptistee Debombourg's art of glass显示文摘With the unveiling of K1l's new cultural extravaganza-the K11 Art Carnival in Wuhan,its highlighted exhibition'Elevation'by contemporary French artist Baptiste Debombourg opened at Chi K11 Art Space on July 30.'Elevation'is Debombourgs biggest solo exhibition in the world so far.It is a retrospectivedisplaywhichfeatures his four iconic installations'Aerial,''Overflow,''Dark Matter,'and'Rheology'as well as dozens of his glass works.In all these works,Debombourg has exploited the fragility yet resistance of glass,deconstructed and recomposed this material into gasinducing pieces of art that may remind people of boulders,tides,or glaciers. | Pan Qian Ge Yuxuan Xiao Mengxing Tan Ziyi | 2022 | Changjiang Weekly2022，，30： | 0 |
| 13 | Highly efficient ternary organic solar cells with excellent open-circuit voltage and fill factor via precisely tuning molecular stacking and morphology显示文摘The micro-morphology and molecular stacking play a key role in determining the charge transport process and nonradiative energy loss, thus impacting the performances of organic solar cells(OSCs). To address this issue, a non-fullerene acceptor PhC6-IC-F with alkylbenzene side-chain, possessing optimized molecular stacking, complementary absorption spectra and forming a cascade energy level alignment in the PM6:BTP-eC9 blend, is introduced as guest acceptor to improve efficiency of ternary OSCs. The bulky phenyl in the side-chain can regulate crystallinity and optimizing phase separation between receptors in ternary blend films, resulting in the optimal phase separations in the ternary films. As a result, high efficiencies of 18.33% as photovoltaic layer are obtained for PhC6-IC-F-based ternary devices with excellent fill factor(FF) of 78.92%. Impressively, the ternary system produces a significantly improved open circuit voltage(V_(oc)) of 0.857 V compared with the binary device,contributing to the reduced density of trap states and suppressed non-radiative recombination result in lower energy loss. This work demonstrates an effective approach for adjusting the aggregation, molecular packing and fine phase separation morphology to increase V_(oc) and FF, paving the way toward high-efficiency OSCs. | Dinghong Sun Zhenyu Chen Jianfeng Zhang Wei Song Jingyu Shi Jintao Zhu Yuanyuan Meng Fei Jin Shuncheng Yang Ziyi Ge | 2024 | Science China Chemistry2024，67，3： | 0 |
| 14 | Inner alkyl chain modulation of small molecular acceptors enables molecular packing optimization and efficient organic solar cells显示文摘With the generation of Y6,organic solar cells have reached remarkable achievement of over 19%efficiency.Alkyl chain is of importance to modulate intermolecular stacking and possibly enhance optoelectronic properties of small molecule acceptors(SMAs).Three alkyl chains of 2-ethylhexyl,2-butylocyl and 3-ethylheptyl were selected to obtain G6-EH,G6-BO and G6-EHep molecules,respectively.Compared to G6-EH and G6-BO,G6-EHep was found inducing unfavourable large domain size.Furthermore,we discover that 2-butyloctyl effectively inhibits monomolecular and bimolecular recombination,improves molecular packing,generates more balanced carrier mobility and enhances exciton dissociation.The SMA with 2-butyloctyl alkyl chains(G6-BO)shows the best electrical and morphological characteristics,achieving a higher power conversion efficiency(PCE)of 17.06%,with an open circuit voltage of 0.912 V,a short-circuit current of 24.22 m A cm-2and a fill factor of 77.25%.Finally,using the ternary strategy by incorporating the G6-BO acceptor into PM6:BTP-e C9,we achieved a higher PCE of18.13%with enhanced electron transport. | Yuntong Guo Zhenyu Chen Jinfeng Ge Jinna Zhang Lin Xie Ruixiang Peng Wei Ma Ziyi Ge | 2023 | Science China Chemistry2023，66，2： | 0 |
| 15 | Primary hospitals in China: current state, challenges, and solutions显示文摘When it comes to primary healthcare services,China’s primary medical system stands out with its unique attributes,shaped by China’s existing framework,cultural heritage,and the rapid growth of its economy and healthcare sector.Unlike established systems in the West,the healthcare landscape of China is in a constant state of evolution,adapting to its ever-changing society. | Ziyi Wang Ge Zhang | 2023 | Hepatobiliary Surgery and Nutrition2023，12，6： | 0 |
| 16 | A universal tactic of using Lewis-base polymer-CNTs composites as additives for high performance cm2-sized and flexible perovskite solar cells显示文摘Lewis-base polymers have been widely utilized as additives to act as a template for the perovskite nucleation/crystal growth and passivate the under-coordinated Pb2+ sites.However,it is uncovered in this work that the polymer on the perovskite grain boundaries would significantly hinder the charge transport due to its low conductivity,which brings about free carrier recombination and photocurrent losses.To circumvent this issue while fully exploiting the benefits of polymers in passivating the trap states in perovskite,we incorporate highly conductive multiwall carbon nanotubes(CNTs) with Lewis-base polymers as coadditives in the perovskite film.Functionalizing the CNTs with-COOH group enables a selective hole-extraction and charge transport from perovskite to the hole transporting materials(HTM).By studying the charge transporting and recombination dynamics,we revealed the individual role of the polymer and CNTs in passivating the trap states and facilitating the charge transport,respectively.As a result,the perovskite solar cells(PSCs) with polymer-CNTs composites exhibit an impressive PCE of 21.7% for a small-area device(0.16 cm2) and 20.7% for a large-area device(1.0 cm2).Moreover,due to the superior mechanical flexibility of both polymer and CNTs,the polymer-CNTs composites incorporation in the perovskite film encourages the fabrication of flexible PSCs(f-PSCs) with an impressive PCE of 18.3%,and a strong mechanical durability by retaining 80%of the initial PCE after 1,000 times bending.In addition,we proved that the selection criteria of the polymers can be extended to other long-chain Lewis-base polymers,which opens new possibilities in design and synthesis of inexpensive material for this tactic towards the fabrication of high performance large-area PSCs and f-PSCs. | Chang Liu Jingsong Sun Xiao-Fang Jiang Like Huang Qiang Lou Yi-Bing Cheng Shulin Song Ziyi Ge | 2021 | Science China Chemistry2021，64，2： | 0 |
| 17 | Two star-shaped small molecule donors based on benzodithiophene unit for organic solar cells显示文摘Star-shaped small molecules have attracted great attention for organic solar cells(OSCs)because they have three-dimensional charge-transport characteristics,strong light absorption capacities and easily tunable energy levels.Herein,three-and four-armed star-shaped small molecule donors,namely BDT-3 Th and BDT-4 Th,respectively,have been successfully designed and synthesized,which used benzodithiophene(BDT)as the central unit.The two star-shaped intermediates(2 a and 2 b)could be simultaneously obtained by one-step of Suzuki coupling,and 1,2-dimethoxyethane played a key role in the Suzuki coupling.Both of them have excellent thermal stability,good solubility and broad absorption.Four-armed BDT-4 Th shows a slightly higher extinction coefficient,a deeper HOMO energy level and an obviously better phase separation morphology when blended with Y6 than three-armed BDT-3 Th.As a result,increased power conversion efficiency(PCE)of 5.83%is obtained in the BDT-4 Th:Y6-based OSC devices,which is obviously higher than that of the BDT-3 Th:Y6-based devices(PCE=3.78%).To the best of our knowledge,this is the highest PCE among the BDT-based star-shaped donors-based OSCs.This result provides an effective strategy to obtain star-shaped small molecule donor materials for high efficient organic solar cells. | Jun Xu Jinsheng Zhang Daobin Yang Kuibao Yu Dandan Li Zihao Xia Ziyi Ge | 2022 | Chinese Chemical Letters2022，33，1： | 0 |
| 18 | Latest progress on fully non-fused electron acceptors for high-performance organic solar cells显示文摘Benefitting from the development of non-fullerene acceptors(NFAs),remarkable advances have been achieved with the power conversion efficiency(PCE)exceeding 19%over the last few years.However,the major achievement comes from fused ring electron acceptors(FREAs)with complex structures,leading to high cost.Hence,it is urgent to design new materials to resolve the cost issues concerning basic commercial requirements of organic solar cells.Recently,great progress has been made in fully non-fused ring electron acceptors(NFREAs)with only single-aromatic ring in the electron-donating core,which might achieve a fine balance between the efficiency and cost,thus accelerating the commercial application of organic solar cells.Therefore,this article summarizes the recent advances of fully NFREAs with efficiency over 10%,which may provide a guidance for developing the cost-effective solar cells. | Jianhong Gao Xiaodong Zhu Hanyi Bao Jibao Feng Xiang Gao Zhitian Liu Ziyi Ge | 2023 | Chinese Chemical Letters2023，34，8： | 0 |
| 19 | Key elements and checklist of shared decisionmaking conversation on life-sustaining treatment in emergency:a multispecialty study from China显示文摘BACKGROUND:Shared decision-making(SDM)has broad application in emergencies.Most published studies have focused on SDM for a certain disease or expert opinions on future research gaps without revealing the full picture or detailed guidance for clinical practice.This study is to investigate the optimal application of SDM to guide life-sustaining treatment(LST)in emergencies.METHODS:This study was a prospective two-round Delphi consensus-seeking survey among multiple stakeholders at the China Consortium of Elite Teaching Hospitals for Residency Education.Participants were identified based on their expertise in medicine,law,administration,medical education,or patient advocacy.All individual items and questions in the questionnaire were scored using a 5-point Likert scale,with responses ranging from'very unimportant'(a score of 1)to'extremely important'(a score of 5).The percentages of the responses that had scores of 4-5on the 5-point Likert scale were calculated.A Kendall’s W coefficient was calculated to evaluate the consensus of experts.RESULTS:A two-level framework consisting of 4 domains and 22 items as well as a ready-touse checklist for the informed consent process for LST was established.An acceptable Kendall’s W coefficient was achieved.CONCLUSION:A consensus-based framework supporting SDM during LST in an emergency department can inform the implementation of guidelines for clinical interventions,research studies,medical education,and policy initiatives. | Shu Li Jing Xie Ziyi Chen Jie Yan Yuliang Zhao Yali Cong Bin Zhao Hua Zhang Hongxia Ge Qingbian Ma Ning Shen | 2023 | World Journal of Emergency Medicine2023，14，5： | 0 |
| 20 | Molecular packing tuning via chlorinated end group enables efficient binary organic solar cells over 18.5%显示文摘Designing novel nonfullerene acceptors(NFAs)is of vital importance for the development of organic solar cells(OSC).Modification on the side chain and end group are two powerful tools to construct efficient NFAs.Here,based on the high-performance L8BO,we selected 3-ethylheptyl to substitute the inner chain of 2-ethylhexyl,obtaining the backbone of BON3.Then we introduced different halogen atoms of fluorine and chlorine on 2-(3-oxo-2,3-dihydro-1Hinden-1-ylidene)malononitrile end group(EG)to construct efficient NFAs named BON3-F and BON3-Cl,respectively.Polymer donor D18 was chosen to combine with two novel NFAs to construct OSC devices.Impressively,D18:BON3-Cl-based device shows a remarkable power conversion efficiency(PCE)of 18.57%,with a high open-circuit voltage(V_(OC))of 0.907 V and an excellent fill factor(FF)of 80.44%,which is one of the highest binary PCE of devices based on D18 as the donor.However,BON3-F-based device shows a relatively lower PCE of 17.79%with a decreased FF of 79.05%.The better photovoltaic performance is mainly attributed to the red-shifted absorption,higher electron and hole mobilities,reduced charge recombination,and enhanced molecular packing in the D18:BON3-Cl films.Also,we performed stability tests on two binary systems;the D18:BON3-Cl and D18:BON3-F devices maintain 88.1%and 85.5%of their initial efficiencies after 169 h of storage at 85°C in an N2-filled glove box,respectively.Our work demonstrates the importance of selecting halogen atoms on EG and provides an efficient binary system of D18:BON3-Cl for further improvement of PCE. | Yafeng Li Zhenyu Chen Xingzheng Yan Ziyi Ge | 2024 | Carbon Energy2024，6，3： | 0 |
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