The method to fluorinate the terminal group has achieved remarkable success and been widely used to fine-tune the intrinsic properties of organic acceptor materials.Referring to chlorination,however,it gets less atten...The method to fluorinate the terminal group has achieved remarkable success and been widely used to fine-tune the intrinsic properties of organic acceptor materials.Referring to chlorination,however,it gets less attention and remains ambiguous effect on organic photovoltaic(OPV)cells.Herein,a new non-fullerene acceptor named Y19 was reported with benzotriazole as the electron-deficient core and 2Cl-ICs as the strong electron-withdrawing end groups.Y19 exhibits a wide film absorption band from 600 nm to 948 nm and low LUMO(the lowest unoccupied molecular orbital)energy level of−3.95 eV.Photovoltaic devices based on PM6:Y19 show high-power conversion efficiency(PCE)of 12.76%with high open-circuit voltage(Voc)of 0.84 V,short-circuit current density(Jsc)of 22.38 mA/cm2 and fill factor(FF)of 68.18%.Broad external quantum efficiency(EQE)response of over 60%in the range of 480−860 nm can be obtained.This study demonstrates that chlorination,as a low-cost molecular design strategy,has its own superiorities to improve device performance and promote the potential application in OPV.展开更多
The rational design of polymer acceptors with strong and broad absorption is critical to improve photovoltaic performance.In this work,a new polymer acceptor PY9-T based on heptacyclic benzotriazole(Y9-C16)as a buildi...The rational design of polymer acceptors with strong and broad absorption is critical to improve photovoltaic performance.In this work,a new polymer acceptor PY9-T based on heptacyclic benzotriazole(Y9-C16)as a building block and thiophene unit as the linking unit was synthesized,which exhibited a low bandgap(1.37 eV)and a high extinction coefficient of the neat film(1.44×10^(5) cm^(−1)).When PY9-T was blended with the wide bandgap polymer donor PBDB-T,the all-polymer solar cells(APSCs)showed a high power conversion efficiency(PCE)of 10.45%with both high open circuit voltage of 0.881 V and short-circuit current density of 19.82 mA/cm^(2).In addition,APSCs based on PY9-T show good thermal stability,as evidenced by slight changes morphologies when annealed at 100℃.These results suggest that Y9-C16 provides a new building block to develop efficient and stable polymer acceptors.展开更多
Sulfate and nitrate reducing bacteria are important culprits for microbiologically influenced corrosion(MIC)using sulfate and nitrate as electron acceptors,respectively.Sulfate and nitrate hold different standard elec...Sulfate and nitrate reducing bacteria are important culprits for microbiologically influenced corrosion(MIC)using sulfate and nitrate as electron acceptors,respectively.Sulfate and nitrate hold different standard electrode potentials,which may lead to differences in corrosion,but their effects on corrosion by the same bacteria have not been reported.The corrosion of Q235 steel affected by Pseudodesulfovibrio cashew(P.cashew)in the sulfate and nitrate media under carbon starvation was studied.It was found that sulfate and nitrate did not lead to differences in corrosion under abiotic conditions.However,P.cashew promoted corrosion in both cases,and the consumption of H_(2)was the main mechanism for MIC.In addition,corrosion was more severe in the sulfate media.The higher corrosivity of P.cashew with sulfate as the electron acceptor is closely related to the higher number of sessile cells in the biofilm,higher bacterial motility,more hydrogen production pathways,and the increased gene expression of enzymes related to energy synthesis.展开更多
目的探讨西南地区雌激素受体α（estrogen receptorα,ERα）基因多态性与原因不明月经过少的关系。方法选择西南地区100例原因不明月经过少患者为实验组,100例正常月经者作为对照组。应用分子生物学的方法分析PvuⅡ、XbaⅠ限制性片段...目的探讨西南地区雌激素受体α（estrogen receptorα,ERα）基因多态性与原因不明月经过少的关系。方法选择西南地区100例原因不明月经过少患者为实验组,100例正常月经者作为对照组。应用分子生物学的方法分析PvuⅡ、XbaⅠ限制性片段长度多态性（restriction fragment length polymorphism,RFLP）。同时对人雌激素受体基因上游的短串联重复序列（short tandem repeat,STR）进行纯化、克隆和序列分析,观察ERα基因多态性基因型在实验组与对照组中的基因型分布。结果P基因型频率实验组为47.5%,对照组为30.5%,OR值1.810（95%CI=1.113-2.765）,P=0.012。实验组X基因型频率为20.5%,对照组为32.0%,OR值0.641（95%CI=0.361-0.898）,P=0.036；PvuⅡ和XbaⅠ限制性片段长度多态性在两组中均呈多态性分布。病例组TA13等位基因频率高于对照组,差异有显著性（P=0.006）,TA15等位基因频率低于对照组,差异有显著性（P=0.033）。结论ERα基因多态性与原因不明月经过少有关,P等位基因可能是其危险因素,X等位基因可能是其保护因素,TA13等位基因可能是其危险因素,TA15等位基因可能是其保护因素。展开更多
基金Project(21875286)supported by the National Natural Science Foundation of China。
文摘The method to fluorinate the terminal group has achieved remarkable success and been widely used to fine-tune the intrinsic properties of organic acceptor materials.Referring to chlorination,however,it gets less attention and remains ambiguous effect on organic photovoltaic(OPV)cells.Herein,a new non-fullerene acceptor named Y19 was reported with benzotriazole as the electron-deficient core and 2Cl-ICs as the strong electron-withdrawing end groups.Y19 exhibits a wide film absorption band from 600 nm to 948 nm and low LUMO(the lowest unoccupied molecular orbital)energy level of−3.95 eV.Photovoltaic devices based on PM6:Y19 show high-power conversion efficiency(PCE)of 12.76%with high open-circuit voltage(Voc)of 0.84 V,short-circuit current density(Jsc)of 22.38 mA/cm2 and fill factor(FF)of 68.18%.Broad external quantum efficiency(EQE)response of over 60%in the range of 480−860 nm can be obtained.This study demonstrates that chlorination,as a low-cost molecular design strategy,has its own superiorities to improve device performance and promote the potential application in OPV.
基金Project(21875286)supported by the National Natural Science Foundation of China。
文摘The rational design of polymer acceptors with strong and broad absorption is critical to improve photovoltaic performance.In this work,a new polymer acceptor PY9-T based on heptacyclic benzotriazole(Y9-C16)as a building block and thiophene unit as the linking unit was synthesized,which exhibited a low bandgap(1.37 eV)and a high extinction coefficient of the neat film(1.44×10^(5) cm^(−1)).When PY9-T was blended with the wide bandgap polymer donor PBDB-T,the all-polymer solar cells(APSCs)showed a high power conversion efficiency(PCE)of 10.45%with both high open circuit voltage of 0.881 V and short-circuit current density of 19.82 mA/cm^(2).In addition,APSCs based on PY9-T show good thermal stability,as evidenced by slight changes morphologies when annealed at 100℃.These results suggest that Y9-C16 provides a new building block to develop efficient and stable polymer acceptors.
基金Project(2022LSL050102)supported by the Laoshan Laboratory,China。
文摘Sulfate and nitrate reducing bacteria are important culprits for microbiologically influenced corrosion(MIC)using sulfate and nitrate as electron acceptors,respectively.Sulfate and nitrate hold different standard electrode potentials,which may lead to differences in corrosion,but their effects on corrosion by the same bacteria have not been reported.The corrosion of Q235 steel affected by Pseudodesulfovibrio cashew(P.cashew)in the sulfate and nitrate media under carbon starvation was studied.It was found that sulfate and nitrate did not lead to differences in corrosion under abiotic conditions.However,P.cashew promoted corrosion in both cases,and the consumption of H_(2)was the main mechanism for MIC.In addition,corrosion was more severe in the sulfate media.The higher corrosivity of P.cashew with sulfate as the electron acceptor is closely related to the higher number of sessile cells in the biofilm,higher bacterial motility,more hydrogen production pathways,and the increased gene expression of enzymes related to energy synthesis.
文摘目的探讨西南地区雌激素受体α（estrogen receptorα,ERα）基因多态性与原因不明月经过少的关系。方法选择西南地区100例原因不明月经过少患者为实验组,100例正常月经者作为对照组。应用分子生物学的方法分析PvuⅡ、XbaⅠ限制性片段长度多态性（restriction fragment length polymorphism,RFLP）。同时对人雌激素受体基因上游的短串联重复序列（short tandem repeat,STR）进行纯化、克隆和序列分析,观察ERα基因多态性基因型在实验组与对照组中的基因型分布。结果P基因型频率实验组为47.5%,对照组为30.5%,OR值1.810（95%CI=1.113-2.765）,P=0.012。实验组X基因型频率为20.5%,对照组为32.0%,OR值0.641（95%CI=0.361-0.898）,P=0.036；PvuⅡ和XbaⅠ限制性片段长度多态性在两组中均呈多态性分布。病例组TA13等位基因频率高于对照组,差异有显著性（P=0.006）,TA15等位基因频率低于对照组,差异有显著性（P=0.033）。结论ERα基因多态性与原因不明月经过少有关,P等位基因可能是其危险因素,X等位基因可能是其保护因素,TA13等位基因可能是其危险因素,TA15等位基因可能是其保护因素。
