A deep trench super-junction LDMOS with double charge compensation layer(DC DT SJ LDMOS)is proposed in this paper.Due to the capacitance effect of the deep trench which is known as silicon-insulator-silicon(SIS)capaci...A deep trench super-junction LDMOS with double charge compensation layer(DC DT SJ LDMOS)is proposed in this paper.Due to the capacitance effect of the deep trench which is known as silicon-insulator-silicon(SIS)capacitance,the charge balance in the super-junction region of the conventional deep trench SJ LDMOS(Con.DT SJ LDMOS)device will be broken,resulting in breakdown voltage(BV)of the device drops.DC DT SJ LDMOS solves the SIS capacitance effect by adding a vertical variable doped charge compensation layer and a triangular charge compensation layer inside the Con.DT SJ LDMOS device.Therefore,the drift region reaches an ideal charge balance state again.The electric field is optimized by double charge compensation and gate field plate so that the breakdown voltage of the proposed device is improved sharply,meanwhile the enlarged on-current region reduces its specific on-resistance.The simulation results show that compared with the Con.DT SJ LD-MOS,the BV of the DC DT SJ LDMOS has been increased from 549.5 to 705.5 V,and the R_(on,sp) decreased to 23.7 mΩ·cm^(2).展开更多
Nonylphenol(NP)residues,as a typical endocrine disrupting chemical(EDC),frequently exist in sewage,surface water,groundwater and even drinking water,which poses a serious threat to human health due to its bioaccumulat...Nonylphenol(NP)residues,as a typical endocrine disrupting chemical(EDC),frequently exist in sewage,surface water,groundwater and even drinking water,which poses a serious threat to human health due to its bioaccumulation.In order to remove NP,a series of MIL-100(Fe)/Zn Fe_(2)O_(4)/flake-like porous carbon nitride(MIL/ZC)was synthesized through in-situ synthesis at room temperature.High performance of ternary MIL/ZC is used to degrade NP under visible light irradiation.The results show that 30MIL/ZC2(20 wt.%Zn Fe_(2)O_(4))ternary composite had the best photocatalytic activity(99.84%)when the dosage was 30 mg.Further mechanism analysis shows that the excellent photocatalytic activity of 30MIL/ZC2could be ascribed to the double charge transfer process between flake-like porous carbon nitride(PCN)and other catalysts in the ternary heterojunction,and the separation of photogenerated electron-hole pairs was more effective.In addition,the 30MIL/ZC2 also showed high stability after five cycles of the photodegradation reaction.Furthermore,the active substance(·O_(2)^(-))was considered to be the main active substance in the NP degradation process.Based on the research results,the possible photocatalytic reaction mechanism of 30MIL/ZC2ternary composite was proposed and discussed in detail.展开更多
The fabrication of a constructive heterostructure and thus the induced 2D/2D interfacial phase indicates great importance in semiconductor based photocatalysts.The energetic electrostatic force of interactions between...The fabrication of a constructive heterostructure and thus the induced 2D/2D interfacial phase indicates great importance in semiconductor based photocatalysts.The energetic electrostatic force of interactions between the positively charged 2D ZnCr LDH nanosheet and the negatively charged 2D S,P co-doped g-C_(3)N_(4)helps to form a robust heterostructure.By doping S and P simultaneously into the g-C_(3)N_(4)matrix,the band potentials have been easily engineered for wide range visible light harvesting in comparison to the pure g-C_(3)N_(4).This innovative 2D/2D S,P co-doped g-C_(3)N_(4)/ZnCr LDH heterostructure interface provides a high surface area and suitable redox potentials for various photocatalytic reactions.The as-fabricated S,P-g-C_(3)N_(4)/ZnCr LDH heterostructure shows considerable enhanced photocatalytic performance for the degradation of ciprofloxacin(95%in 90 min)and H_(2)evolution(1319μmol per 2 h)under visible light irradiation as compared to the pure material(g-C_(3)N_(4),S,P-g-C_(3)N_(4),and LDH nanosheet)and monodoped heterostructure.The enhanced photocatalytic activities attributed to the loading of the ZnCr LDH nanosheet onto the surface of the S,P co-doped g-C_(3)N_(4)allows effective interfacial charge mobility and transfer through intimate 2D/2D interfacial contact.In addition,the co-doping also generates some defect sites in the heterostructure that act as trapping centers for photogenerated charge pairs and the excess unpaired electrons of S and P atom delocalized in theπ-conjugated triazine ring,constructing a rich-electron state,which is beneficial for the photocatalytic process.XRD,FTIR,and TEM studies of the reused composite show that the heterostructure hybrid material is very stable and can be reused many times.Our innovation in the fabrication,design,and physicochemical behaviours of the 2D/2D heterostructure may get utilized in different photocatalytic performances towards antibiotic degradation and H_(2)production.展开更多
The new measured data of elastic and inelastic 20Ne+130Te scattering at an energy of 15.3 A MeV are analyzed in framework of the nuclear optical potential.Three types of semi-microscopic potentials are used:the real p...The new measured data of elastic and inelastic 20Ne+130Te scattering at an energy of 15.3 A MeV are analyzed in framework of the nuclear optical potential.Three types of semi-microscopic potentials are used:the real part is calculated using a double folding model in conjunction with the conventional phenomenological Woods-Saxon(WS)potential for the imaginary part.Two real cluster models are constructed using the cluster structure of^(20)Ne nucleus as 5αandα+^(16)O.The real part of the third potential is generated using a CDM3Y6 interaction employed for comparison.Three excited energies to the superposition of the projectile and target states,ground-state(Quasi),1.6 and 2.5 MeV are investigated using deformed potentials.The contributions of these states are calculated using a one-step distorted wave Born approximation and coupled Channels approaches.Successful calculations and results using semi-microscopic potentials in simple one-channel and coupled channels are obtained.The values of cross section and volume integrals require more contributions to enable more comparisons regarding this project.展开更多
文摘A deep trench super-junction LDMOS with double charge compensation layer(DC DT SJ LDMOS)is proposed in this paper.Due to the capacitance effect of the deep trench which is known as silicon-insulator-silicon(SIS)capacitance,the charge balance in the super-junction region of the conventional deep trench SJ LDMOS(Con.DT SJ LDMOS)device will be broken,resulting in breakdown voltage(BV)of the device drops.DC DT SJ LDMOS solves the SIS capacitance effect by adding a vertical variable doped charge compensation layer and a triangular charge compensation layer inside the Con.DT SJ LDMOS device.Therefore,the drift region reaches an ideal charge balance state again.The electric field is optimized by double charge compensation and gate field plate so that the breakdown voltage of the proposed device is improved sharply,meanwhile the enlarged on-current region reduces its specific on-resistance.The simulation results show that compared with the Con.DT SJ LD-MOS,the BV of the DC DT SJ LDMOS has been increased from 549.5 to 705.5 V,and the R_(on,sp) decreased to 23.7 mΩ·cm^(2).
基金supported by the National Natural Science Foundation of China(No.21477050)the International Scientific and Technological Cooperation in Changzhou(No.CZ20140017)+2 种基金Postgraduate Research Innovation Project of Jiangsu Province(Nos.KYCX20_2561,KYCX20_2598)the Jiangsu Planned Projects for Postdoctoral Research Funds(No.2019K112)the Jiangsu Province subsidizes the recruitment of postdoctoral personnel(No.2019Z143)。
文摘Nonylphenol(NP)residues,as a typical endocrine disrupting chemical(EDC),frequently exist in sewage,surface water,groundwater and even drinking water,which poses a serious threat to human health due to its bioaccumulation.In order to remove NP,a series of MIL-100(Fe)/Zn Fe_(2)O_(4)/flake-like porous carbon nitride(MIL/ZC)was synthesized through in-situ synthesis at room temperature.High performance of ternary MIL/ZC is used to degrade NP under visible light irradiation.The results show that 30MIL/ZC2(20 wt.%Zn Fe_(2)O_(4))ternary composite had the best photocatalytic activity(99.84%)when the dosage was 30 mg.Further mechanism analysis shows that the excellent photocatalytic activity of 30MIL/ZC2could be ascribed to the double charge transfer process between flake-like porous carbon nitride(PCN)and other catalysts in the ternary heterojunction,and the separation of photogenerated electron-hole pairs was more effective.In addition,the 30MIL/ZC2 also showed high stability after five cycles of the photodegradation reaction.Furthermore,the active substance(·O_(2)^(-))was considered to be the main active substance in the NP degradation process.Based on the research results,the possible photocatalytic reaction mechanism of 30MIL/ZC2ternary composite was proposed and discussed in detail.
文摘The fabrication of a constructive heterostructure and thus the induced 2D/2D interfacial phase indicates great importance in semiconductor based photocatalysts.The energetic electrostatic force of interactions between the positively charged 2D ZnCr LDH nanosheet and the negatively charged 2D S,P co-doped g-C_(3)N_(4)helps to form a robust heterostructure.By doping S and P simultaneously into the g-C_(3)N_(4)matrix,the band potentials have been easily engineered for wide range visible light harvesting in comparison to the pure g-C_(3)N_(4).This innovative 2D/2D S,P co-doped g-C_(3)N_(4)/ZnCr LDH heterostructure interface provides a high surface area and suitable redox potentials for various photocatalytic reactions.The as-fabricated S,P-g-C_(3)N_(4)/ZnCr LDH heterostructure shows considerable enhanced photocatalytic performance for the degradation of ciprofloxacin(95%in 90 min)and H_(2)evolution(1319μmol per 2 h)under visible light irradiation as compared to the pure material(g-C_(3)N_(4),S,P-g-C_(3)N_(4),and LDH nanosheet)and monodoped heterostructure.The enhanced photocatalytic activities attributed to the loading of the ZnCr LDH nanosheet onto the surface of the S,P co-doped g-C_(3)N_(4)allows effective interfacial charge mobility and transfer through intimate 2D/2D interfacial contact.In addition,the co-doping also generates some defect sites in the heterostructure that act as trapping centers for photogenerated charge pairs and the excess unpaired electrons of S and P atom delocalized in theπ-conjugated triazine ring,constructing a rich-electron state,which is beneficial for the photocatalytic process.XRD,FTIR,and TEM studies of the reused composite show that the heterostructure hybrid material is very stable and can be reused many times.Our innovation in the fabrication,design,and physicochemical behaviours of the 2D/2D heterostructure may get utilized in different photocatalytic performances towards antibiotic degradation and H_(2)production.
文摘The new measured data of elastic and inelastic 20Ne+130Te scattering at an energy of 15.3 A MeV are analyzed in framework of the nuclear optical potential.Three types of semi-microscopic potentials are used:the real part is calculated using a double folding model in conjunction with the conventional phenomenological Woods-Saxon(WS)potential for the imaginary part.Two real cluster models are constructed using the cluster structure of^(20)Ne nucleus as 5αandα+^(16)O.The real part of the third potential is generated using a CDM3Y6 interaction employed for comparison.Three excited energies to the superposition of the projectile and target states,ground-state(Quasi),1.6 and 2.5 MeV are investigated using deformed potentials.The contributions of these states are calculated using a one-step distorted wave Born approximation and coupled Channels approaches.Successful calculations and results using semi-microscopic potentials in simple one-channel and coupled channels are obtained.The values of cross section and volume integrals require more contributions to enable more comparisons regarding this project.
