Metal halide perovskite solar cells(PSCs)are anticipated to play a pivotal role in the next generation of photovoltaic technologies,but their unsatisfactory stability hinders further commercial applications.Particular...Metal halide perovskite solar cells(PSCs)are anticipated to play a pivotal role in the next generation of photovoltaic technologies,but their unsatisfactory stability hinders further commercial applications.Particularly,numerous interfacial defects and poor mechanical adhesion at the perovskite buried interface present a critical obstacle hindering power conversion efficiency(PCE)and longterm stability of PSCs.Here,different from conventional small-molecule or linear polymer interface modifiers,we introduce a star-shaped PMMA-b-PDMAEMA(S-MD,where PMMA=poly(methyl methacrylate)and PDMAEMA=poly(dimethylaminoethyl methacrylate))polymer as a multifunctional bridge-linking polymer for simultaneous defect passivation and mechanical reinforcement at the buried interface of inverted(p-i-n)PSCs.S-MD features a three-dimensional architecture with multiple extended conjugated arms,offering multiple Lewis base functional groups(e.g.,C=O and R-N(CH_(3))_(2))with a high density of multidentate coordination sites.These groups can effectively coordinate with electron-deficient defects at the perovskite buried interface,enabling improved crystallization,reduced defect density,and enhanced interfacial adhesion.As a result,the interfacial fracture strength increases from 0.13 to 1.66 MPa.The resultant device achieves a PCE of 26.35%(certified steady-state PCE of 25.96%).The flexible device retains over 90%of its initial efficiency after 3000 flexing cycles at a curvature radius of 6 mm(R=6 mm).This work highlights a multidentate coordinating,star-shaped polymer interface strategy that offers a promising pathway toward highly efficient and stable inverted PSCs.展开更多
ω -Bromopropylporphyrin ether synthesized from the raction of 1,3-dibromopropane as the bridge-linked reagent and 5-(4-hydroxyphenyl)-10,15,20-triphenylporphyrin (H_2MHTPP) as the matrix reacts with 5,15-di(4- hydrox...ω -Bromopropylporphyrin ether synthesized from the raction of 1,3-dibromopropane as the bridge-linked reagent and 5-(4-hydroxyphenyl)-10,15,20-triphenylporphyrin (H_2MHTPP) as the matrix reacts with 5,15-di(4- hydroxyphenyl)-10,20-diphenyl porphyrin( trans -H_2DHDPP) to give the title nanometer porphyrin trimer. The characterization was carried out by means of elemental analyses,UV-Vis,IR, 1H NMR and XRD.展开更多
Partial shadings on the photovoltaic(PV)array causes reduction in maximum power generation.Reconfiguration of PV arrays plays an important role in increasing the maximum power generation from PV array configurations u...Partial shadings on the photovoltaic(PV)array causes reduction in maximum power generation.Reconfiguration of PV arrays plays an important role in increasing the maximum power generation from PV array configurations under partial shadings.In general,partial shadings on the PV arrays are concentrated on a group of modules.Therefore,the distribution of shading over the array increases the maximum power generation.This paper uses a modified Sudoku pattern to increase the maximum power generation from the PV array configurations.The PV array configurations are analyzed by considering column wiring resistance and cross ties resistance.The modified Sudoku pattern is applied to Total-Cross-Tied(T-C-T),Bridge-Link(B-L)and Honey-Comb(H-C)configurations and their performances are analyzed under various shading patterns,such as short narrow,short wide,long narrow,long wide,middle and diagonal.The specifications,such as Global Maximum Power(GMP),Mismatch losses,Fill Factor,Efficiency are considered to see the efficacy of various PV array configurations and their reconfigurations.From the results,it can be concluded that reconfigured T-C-T PV array generates the highest GMP compared to other configurations under considered shading patterns.展开更多
基金supported by the National Natural Science Foundation of China(Nos.52125206,52433013,52273050,and 22409008)the Beijing Natural Science Foundation(No.Z240024)+3 种基金the National Key Research and Development Program of China(No.2023YFB4202502)the China Postdoctoral Science Foundation(No.2024T170023)the Qing Lan Project,the Tencent Foundation through the Xplorer Prize,the China National Petroleum Corporation-Peking University Strategic Cooperation Project of Fundamental Research,the Sinopec Seeding Programthe Yunnan Provincial Science and Technology Project at Southwest United Graduate School(No.202302AO370013).
文摘Metal halide perovskite solar cells(PSCs)are anticipated to play a pivotal role in the next generation of photovoltaic technologies,but their unsatisfactory stability hinders further commercial applications.Particularly,numerous interfacial defects and poor mechanical adhesion at the perovskite buried interface present a critical obstacle hindering power conversion efficiency(PCE)and longterm stability of PSCs.Here,different from conventional small-molecule or linear polymer interface modifiers,we introduce a star-shaped PMMA-b-PDMAEMA(S-MD,where PMMA=poly(methyl methacrylate)and PDMAEMA=poly(dimethylaminoethyl methacrylate))polymer as a multifunctional bridge-linking polymer for simultaneous defect passivation and mechanical reinforcement at the buried interface of inverted(p-i-n)PSCs.S-MD features a three-dimensional architecture with multiple extended conjugated arms,offering multiple Lewis base functional groups(e.g.,C=O and R-N(CH_(3))_(2))with a high density of multidentate coordination sites.These groups can effectively coordinate with electron-deficient defects at the perovskite buried interface,enabling improved crystallization,reduced defect density,and enhanced interfacial adhesion.As a result,the interfacial fracture strength increases from 0.13 to 1.66 MPa.The resultant device achieves a PCE of 26.35%(certified steady-state PCE of 25.96%).The flexible device retains over 90%of its initial efficiency after 3000 flexing cycles at a curvature radius of 6 mm(R=6 mm).This work highlights a multidentate coordinating,star-shaped polymer interface strategy that offers a promising pathway toward highly efficient and stable inverted PSCs.
文摘ω -Bromopropylporphyrin ether synthesized from the raction of 1,3-dibromopropane as the bridge-linked reagent and 5-(4-hydroxyphenyl)-10,15,20-triphenylporphyrin (H_2MHTPP) as the matrix reacts with 5,15-di(4- hydroxyphenyl)-10,20-diphenyl porphyrin( trans -H_2DHDPP) to give the title nanometer porphyrin trimer. The characterization was carried out by means of elemental analyses,UV-Vis,IR, 1H NMR and XRD.
文摘Partial shadings on the photovoltaic(PV)array causes reduction in maximum power generation.Reconfiguration of PV arrays plays an important role in increasing the maximum power generation from PV array configurations under partial shadings.In general,partial shadings on the PV arrays are concentrated on a group of modules.Therefore,the distribution of shading over the array increases the maximum power generation.This paper uses a modified Sudoku pattern to increase the maximum power generation from the PV array configurations.The PV array configurations are analyzed by considering column wiring resistance and cross ties resistance.The modified Sudoku pattern is applied to Total-Cross-Tied(T-C-T),Bridge-Link(B-L)and Honey-Comb(H-C)configurations and their performances are analyzed under various shading patterns,such as short narrow,short wide,long narrow,long wide,middle and diagonal.The specifications,such as Global Maximum Power(GMP),Mismatch losses,Fill Factor,Efficiency are considered to see the efficacy of various PV array configurations and their reconfigurations.From the results,it can be concluded that reconfigured T-C-T PV array generates the highest GMP compared to other configurations under considered shading patterns.
