A series of organic solar cells(OSCs)are prepared with PTB7:PC71 BM as the host materials and DIB-SQ as the third component.The power conversion efficienty(PCE)of OSCs can be improved from 6.79%to 7.92%by incorporatin...A series of organic solar cells(OSCs)are prepared with PTB7:PC71 BM as the host materials and DIB-SQ as the third component.The power conversion efficienty(PCE)of OSCs can be improved from 6.79%to 7.92%by incorporating 6 wt%DIB-SQ into donors,resulting from the enhanced short circuit current density(J_(SC))and fill factor(FF).The increased JSCof the optimized ternary OSCs should be attributed to the enhanced photon harvesting of teranry active layer by incorporating DIB-SQ.Meanwhile,FF of the optimized ternary OSCs should be due to the optimied phase separation.The open circuit voltage(V_(OC))of tenray OSCs can be maintained at a constant of 0.75 V,indicating that all photogenerated holes willl be transported along the channels formed by PTB7.展开更多
There is no any spin rotational construction for zero spin particle, Casimir operator and the thired component of zero spin particle areandrespectively. Further, there are no spin interactions between zero spin partic...There is no any spin rotational construction for zero spin particle, Casimir operator and the thired component of zero spin particle areandrespectively. Further, there are no spin interactions between zero spin particle and other spin particles. This paper shows: in Spin Topological Space, STS [1], the third component of zero spin particle possesses non-zero eigenvalues besides original zero value, this leads to a miraculous spin interaction phenomenon between zero spin particle and other spin particles. In STS, zero spin particle could "dissolve other spin particles", degrade the values of their Casimir operator, and decay these spin particles into other forms of spin particle.展开更多
In organic solar cells(OSCs),it is an effective way to improve the power conversion efficiency(PCE)by adding a vip component with appropriate absorption and energy levels in the host system.Herein,a new nonfullerene...In organic solar cells(OSCs),it is an effective way to improve the power conversion efficiency(PCE)by adding a vip component with appropriate absorption and energy levels in the host system.Herein,a new nonfullerene acceptor(NFA)named TBF-2Cl was developed by the strategy of expanding theπconjugated core of 2,2’-(((4,4,9,9-tetrahexyl-4,9-dihydro-s-indaceno[1,2-b:5,6-b’]dithiophene-2,7-diyl)bis(methaneylylidene))bis(5,6-dichloro-3-oxo-2,3-dihydro-1H-indene-2,1-diylidene))dimalononitrile(IDT-4Cl)with two benzene rings.With increase of benzene units,TBF-2Cl exhibits higher lowest unoccupied molecular orbital(LUMO)level of-3.75 eV than that of one benzene unit based NFA IDT-4Cl and fluorene core based NFA F-2Cl,which facilitates enhancing the open-circuit voltage(V_(oc))of ternary devices.Moreover,TBF-2Cl film shows a medium optical bandgap with the absorption range from 500-800 nm,being well complementary with the wide bandgap polymer donor D18 and narrow bandgap NFA CH-6F.Accordingly,a remarkable PCE of 18.92%with a high short-circuit current density(J_(sc))of 27.40 mA·cm^(-2),a fill factor(FF)of 0.749,especially an outstanding V_(oc) of 0.922 V was achieved for the optimal ternary device based on D18:TBF-2Cl:CH-6F,surpassing the binary counterpart(17.08%).The findings provide insight into the development of new vip acceptors for obtaining more efficient OSCs.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant Nos.61675017,61377029,and 61705161)the National Training Program of Innovation and Entrepreneurship for Undergraduates,China(Grant No.170170010)
文摘A series of organic solar cells(OSCs)are prepared with PTB7:PC71 BM as the host materials and DIB-SQ as the third component.The power conversion efficienty(PCE)of OSCs can be improved from 6.79%to 7.92%by incorporating 6 wt%DIB-SQ into donors,resulting from the enhanced short circuit current density(J_(SC))and fill factor(FF).The increased JSCof the optimized ternary OSCs should be attributed to the enhanced photon harvesting of teranry active layer by incorporating DIB-SQ.Meanwhile,FF of the optimized ternary OSCs should be due to the optimied phase separation.The open circuit voltage(V_(OC))of tenray OSCs can be maintained at a constant of 0.75 V,indicating that all photogenerated holes willl be transported along the channels formed by PTB7.
文摘There is no any spin rotational construction for zero spin particle, Casimir operator and the thired component of zero spin particle areandrespectively. Further, there are no spin interactions between zero spin particle and other spin particles. This paper shows: in Spin Topological Space, STS [1], the third component of zero spin particle possesses non-zero eigenvalues besides original zero value, this leads to a miraculous spin interaction phenomenon between zero spin particle and other spin particles. In STS, zero spin particle could "dissolve other spin particles", degrade the values of their Casimir operator, and decay these spin particles into other forms of spin particle.
基金supported by the National Natural Science Foundation of China(No.52173010)Jining University(Nos.2022HHKJ11,2019BSZX01).
文摘In organic solar cells(OSCs),it is an effective way to improve the power conversion efficiency(PCE)by adding a vip component with appropriate absorption and energy levels in the host system.Herein,a new nonfullerene acceptor(NFA)named TBF-2Cl was developed by the strategy of expanding theπconjugated core of 2,2’-(((4,4,9,9-tetrahexyl-4,9-dihydro-s-indaceno[1,2-b:5,6-b’]dithiophene-2,7-diyl)bis(methaneylylidene))bis(5,6-dichloro-3-oxo-2,3-dihydro-1H-indene-2,1-diylidene))dimalononitrile(IDT-4Cl)with two benzene rings.With increase of benzene units,TBF-2Cl exhibits higher lowest unoccupied molecular orbital(LUMO)level of-3.75 eV than that of one benzene unit based NFA IDT-4Cl and fluorene core based NFA F-2Cl,which facilitates enhancing the open-circuit voltage(V_(oc))of ternary devices.Moreover,TBF-2Cl film shows a medium optical bandgap with the absorption range from 500-800 nm,being well complementary with the wide bandgap polymer donor D18 and narrow bandgap NFA CH-6F.Accordingly,a remarkable PCE of 18.92%with a high short-circuit current density(J_(sc))of 27.40 mA·cm^(-2),a fill factor(FF)of 0.749,especially an outstanding V_(oc) of 0.922 V was achieved for the optimal ternary device based on D18:TBF-2Cl:CH-6F,surpassing the binary counterpart(17.08%).The findings provide insight into the development of new vip acceptors for obtaining more efficient OSCs.
