Antimony trisulfide(Sb_(2)S_(3)) solar cells suffer from large open circuit voltage deficits due to their intrinsic defects which limit the power conversion efficiency.Thus,it is important to elucidate these defects’...Antimony trisulfide(Sb_(2)S_(3)) solar cells suffer from large open circuit voltage deficits due to their intrinsic defects which limit the power conversion efficiency.Thus,it is important to elucidate these defects’ origin and defects at the interface.Here,we discover that sulfide radical defects have a significant impact on the performance of Sb_(2)S_(3)solar cells.Moreover,it has been illustrated that these defects at the CdS/Sb_(2)S_(3)interface can be reduced by optimizing the deposition process.A trap distribution model is used to quantify the defect density at the CdS/Sb_(2)S_(3)interface.It shows that the interface defects can be reduced by24% by improving the deposition process.This work reveals the importance of interface defects and guides the future optimization of Sb_(2)S_(3)solar cells.展开更多
Wide-bandgap(WBG)perovskite solar cells(PSCs)play a fundamental role in perovskite-based tandem solar cells.However,the efficiency of WBG PSCs is limited by significant open-circuit voltage losses,which are primarily ...Wide-bandgap(WBG)perovskite solar cells(PSCs)play a fundamental role in perovskite-based tandem solar cells.However,the efficiency of WBG PSCs is limited by significant open-circuit voltage losses,which are primarily caused by surface defects.In this study,we present a novel method for modifying surfaces using the multifunctional S-ethylisothiourea hydrobromide(SEBr),which can passivate both Pb^(-1)and FA^(-1)terminated surfaces,Moreover,the SEBr upshifted the Fermi level at the perovskite interface,thereby promoting carrier collection.This proposed method was effective for both 1.67 and 1.77 eV WBG PSCs,achieving power conversion efficiencies(PCEs)of 22.47%and 19.90%,respectively,with V_(OC)values of 1.28 and 1.33 V,along with improved film and device stability.With this advancement,we were able to fabricate monolithic all-perovskite tandem solar cells with a champion PCE of 27.10%,This research offers valuable insights for passivating the surface trap states of WBG perovskite through rational multifunctional molecular engineering.展开更多
During last decade,organic photovoltaics experienced an exciting renaissance[1-5],mainly benefiting from the development of non-fullerene acceptors(NFAs),which boosted the power conversion efficiency to-20%[6,7].Along...During last decade,organic photovoltaics experienced an exciting renaissance[1-5],mainly benefiting from the development of non-fullerene acceptors(NFAs),which boosted the power conversion efficiency to-20%[6,7].Along with the unprecedented success of organic solar cells,non-fullerene acceptors also find other optoelectronic applications.In particular,high-performance organic photodetectors(OPDs)[8,9]based on non-fullerene acceptors have been reported.展开更多
Lynch syndrome(LS),an autosomal dominant inherited syndrome causing tumor predisposition,is often associated with colorectal cancer(CRC)and,second most commonly,endometrial cancer(EC).1–3 It is caused by a heterozygo...Lynch syndrome(LS),an autosomal dominant inherited syndrome causing tumor predisposition,is often associated with colorectal cancer(CRC)and,second most commonly,endometrial cancer(EC).1–3 It is caused by a heterozygous(one allele affected)inactivating germline mutation in one of the mismatch repair(MMR)genes;germline deletion of the epithelial cell adhesion molecule(EPCAM)gene may also result in LS.4–6 Here,we report a Chinese family with LS,identifying two novel mutations in MMR(mismatch repair)genes that are related to LS development and may facilitate its diagnosis.展开更多
Transfer printing of small-molecular organic semiconductors often faces challenges due to surface adhesion mismatch.Here,we developed a sacrificing-layer-assisted transfer printing technique for the deposition of smal...Transfer printing of small-molecular organic semiconductors often faces challenges due to surface adhesion mismatch.Here,we developed a sacrificing-layer-assisted transfer printing technique for the deposition of smallmolecular thin films.High-boiling-point ethylene glycol(EG)was doped in aqueous solution poly(3,4-ethylenedioxythiophene)polystyrene sulfonate(PEDOT:PSS)as the sacrificing layer to manipulate residual water in film,which allowed chlorobenzene solution to spontaneously spread and form uniform film.展开更多
Organic solar cells have attracted academic and industrial interests due to the advantages like lightweight,flexibility and roll-to-roll fabrication.Nowadays,18%power conversion efficiency has been achieved in the sta...Organic solar cells have attracted academic and industrial interests due to the advantages like lightweight,flexibility and roll-to-roll fabrication.Nowadays,18%power conversion efficiency has been achieved in the state-of-the-art organic solar cells.The recent rapid progress in organic solar cells relies on the continuously emerging new materials and device fabrication technologies,and the deep understanding on film morphology,molecular packing and device physics.Donor and acceptor materials are the key materials for organic solar cells since they determine the device performance.The past 25 years have witnessed an odyssey in developing high-performance donors and acceptors.In this review,we focus on those star materials and milestone work,and introduce the molecular structure evolution of key materials.These key materials include homopolymer donors,D-A copolymer donors,A-D-A small molecular donors,fullerene acceptors and nonfullerene acceptors.At last,we outlook the challenges and very important directions in key materials development.展开更多
Fullerenes are electron transporting organic semiconductors with a wide range of applications.In particular,methanofullerenes have been the preferred choice for solution-processed solar cells and photodiodes.The wide ...Fullerenes are electron transporting organic semiconductors with a wide range of applications.In particular,methanofullerenes have been the preferred choice for solution-processed solar cells and photodiodes.The wide applicability of fullerenes as both‘ntype’transport materials and electron acceptors is clear.However,what is still a matter of debate is whether the fullerenes can also support efficient transport of holes,particularly in diode geometries.In this letter,we utilize a number of recently developed experimental methods for selective electron and hole mobility measurements.We show for the two most widely used solution processable fullerenes,PC70-and-PC60BM,that whilst both exhibit electron mobilities as high as 10^(−3)cm^(2)/Vs,their hole mobilities are<10^(−9)cm^(2)/Vs.Thus charge transport in these fullerenes can be considered predominantly unipolar in diode configurations.展开更多
基金support from the National Key R&D Program of China(2019YFE0120300)the National Natural Science Foundation of China(NSFC,11904266,62204174 and 91850207)the Fundamental Research Funds for the Central Universities(2042021kf0202 and 2042021kf0069)。
文摘Antimony trisulfide(Sb_(2)S_(3)) solar cells suffer from large open circuit voltage deficits due to their intrinsic defects which limit the power conversion efficiency.Thus,it is important to elucidate these defects’ origin and defects at the interface.Here,we discover that sulfide radical defects have a significant impact on the performance of Sb_(2)S_(3)solar cells.Moreover,it has been illustrated that these defects at the CdS/Sb_(2)S_(3)interface can be reduced by optimizing the deposition process.A trap distribution model is used to quantify the defect density at the CdS/Sb_(2)S_(3)interface.It shows that the interface defects can be reduced by24% by improving the deposition process.This work reveals the importance of interface defects and guides the future optimization of Sb_(2)S_(3)solar cells.
基金financially supported by the National Natural Science Foundation of China(52330004)the Fundamental Research Funds for the Central Universities(WUT:2023IVA075 and 2023IVB009)+3 种基金the financial support from RISE project Grant(Q-CDBK)Start-up Fund for RAPs under the Strategic Hiring Scheme(PoluU)(1-BD1H)PRI Strategic Grant(1-CD7X)RI-iWEAR Strategic Supporting Scheme(1-CD94)。
文摘Wide-bandgap(WBG)perovskite solar cells(PSCs)play a fundamental role in perovskite-based tandem solar cells.However,the efficiency of WBG PSCs is limited by significant open-circuit voltage losses,which are primarily caused by surface defects.In this study,we present a novel method for modifying surfaces using the multifunctional S-ethylisothiourea hydrobromide(SEBr),which can passivate both Pb^(-1)and FA^(-1)terminated surfaces,Moreover,the SEBr upshifted the Fermi level at the perovskite interface,thereby promoting carrier collection.This proposed method was effective for both 1.67 and 1.77 eV WBG PSCs,achieving power conversion efficiencies(PCEs)of 22.47%and 19.90%,respectively,with V_(OC)values of 1.28 and 1.33 V,along with improved film and device stability.With this advancement,we were able to fabricate monolithic all-perovskite tandem solar cells with a champion PCE of 27.10%,This research offers valuable insights for passivating the surface trap states of WBG perovskite through rational multifunctional molecular engineering.
基金the financially supports from the National Natural Science Foundation of China (61875154)the National Natural Science Foundation of China (51922032, 21961160720)+4 种基金Wuhan Science and Technology Bureau (2022010801010108)the open research fund of Hubei Luojia Laboratory (220100042)the National Key Research and Development Program of China (2020YFB2008800)the open research fund of Songshan Lake Materials Laboratory (2021SLABFK02)the National Key Research and Development Program of China (2017YFA0206600).
文摘During last decade,organic photovoltaics experienced an exciting renaissance[1-5],mainly benefiting from the development of non-fullerene acceptors(NFAs),which boosted the power conversion efficiency to-20%[6,7].Along with the unprecedented success of organic solar cells,non-fullerene acceptors also find other optoelectronic applications.In particular,high-performance organic photodetectors(OPDs)[8,9]based on non-fullerene acceptors have been reported.
基金This study was supported by the National Natural Scientific Foundation of China grants(No.81872120 to HL).
文摘Lynch syndrome(LS),an autosomal dominant inherited syndrome causing tumor predisposition,is often associated with colorectal cancer(CRC)and,second most commonly,endometrial cancer(EC).1–3 It is caused by a heterozygous(one allele affected)inactivating germline mutation in one of the mismatch repair(MMR)genes;germline deletion of the epithelial cell adhesion molecule(EPCAM)gene may also result in LS.4–6 Here,we report a Chinese family with LS,identifying two novel mutations in MMR(mismatch repair)genes that are related to LS development and may facilitate its diagnosis.
基金financially supported by the National Natural Science Foundation of China(No.62175189)the Shenzhen Science and Technology Program(KQTD20170330110107046)+1 种基金funding support from the Program for Promoting Academic Collaboration and Senior Talent Fostering between China and Canada,Australia,NewZealand,and Latin America(2021-109)the Joint China-SwedenMobility Programme(No.52211530052).
文摘Transfer printing of small-molecular organic semiconductors often faces challenges due to surface adhesion mismatch.Here,we developed a sacrificing-layer-assisted transfer printing technique for the deposition of smallmolecular thin films.High-boiling-point ethylene glycol(EG)was doped in aqueous solution poly(3,4-ethylenedioxythiophene)polystyrene sulfonate(PEDOT:PSS)as the sacrificing layer to manipulate residual water in film,which allowed chlorobenzene solution to spontaneously spread and form uniform film.
基金supported by the National Natural Science Foundation of China(51773045,21772030,51922032,21961160720)。
文摘Organic solar cells have attracted academic and industrial interests due to the advantages like lightweight,flexibility and roll-to-roll fabrication.Nowadays,18%power conversion efficiency has been achieved in the state-of-the-art organic solar cells.The recent rapid progress in organic solar cells relies on the continuously emerging new materials and device fabrication technologies,and the deep understanding on film morphology,molecular packing and device physics.Donor and acceptor materials are the key materials for organic solar cells since they determine the device performance.The past 25 years have witnessed an odyssey in developing high-performance donors and acceptors.In this review,we focus on those star materials and milestone work,and introduce the molecular structure evolution of key materials.These key materials include homopolymer donors,D-A copolymer donors,A-D-A small molecular donors,fullerene acceptors and nonfullerene acceptors.At last,we outlook the challenges and very important directions in key materials development.
基金the Support Plan for Overseas Students to Return to China for Entrepreneurship and Innovation(cx2020003)the Fundamental Research Funds for the Central Universities(2020CDJQY-A028 and 2020CDJ-LHZZ-074)the Natural Science Foundation of Chongqing(cstc2020jcyj-msxmX0629)。
基金the Australian Government through the Australian Renewable Energy Agency(ARENA)Australian Centre for Advanced Photovoltaics(ACAP)the Australian Government.A.A.is now a Sêr Cymru Rising Star senior fellow.P.M.is currently a Sêr Cymru Research Chair.S.S.is now a Sofja Kovalevskaja awardee of Alexander von Humboldt Foundation.P.L.B.was a University of Queensland Vice Chancellor’s Research Focused Fellow and is currently an ARC Laureate Fellow(FL160100067).
文摘Fullerenes are electron transporting organic semiconductors with a wide range of applications.In particular,methanofullerenes have been the preferred choice for solution-processed solar cells and photodiodes.The wide applicability of fullerenes as both‘ntype’transport materials and electron acceptors is clear.However,what is still a matter of debate is whether the fullerenes can also support efficient transport of holes,particularly in diode geometries.In this letter,we utilize a number of recently developed experimental methods for selective electron and hole mobility measurements.We show for the two most widely used solution processable fullerenes,PC70-and-PC60BM,that whilst both exhibit electron mobilities as high as 10^(−3)cm^(2)/Vs,their hole mobilities are<10^(−9)cm^(2)/Vs.Thus charge transport in these fullerenes can be considered predominantly unipolar in diode configurations.
