Photovoltaic/thermoelectric(PV/TE)coupling systems simultaneously cool solar cells and recover waste heat.Single-wall carbon nanotubes(SWCNTs)films are expected to simultaneously exhibit their electrical conductivity,...Photovoltaic/thermoelectric(PV/TE)coupling systems simultaneously cool solar cells and recover waste heat.Single-wall carbon nanotubes(SWCNTs)films are expected to simultaneously exhibit their electrical conductivity,thermal conductivity,and thermoelectric properties in this application.Fabricating SWCNTs films with polymer-dispersed SWCNTs are simple,safe,and scalable.However,the difficulty in simultaneously enhancing both dispersion quality and SWCNT concentration significantly limit the electrical conductivity of these films.Herein,we develop a SWCNT redispersion method in Nafion ethanol system to achieve well-dispersion at high SWCNT concentrations.Using this dispersion,A4-sized films were readily prepared,achieving remarkable electrical conductivity of 1.97 MS/m.The large-area film exhibits a high power factor(654.37μW/(m·K^(2)))and apparent thermal conductivity(529 W/(m·K)),and is integrated into a 330 cm^(2)thermoelectric/photovoltaic coupling system.The PV output power increases by 220 mW.An additional 70 mV thermoelectric voltage is generated.Moreover,the investigation of the drying process unravels how polymer,solvent and SWCNT concentration collectively dominate the film uniformity.This work significantly enhances the electrical conductivity of polymer-dispersed SWCNTs and explores an application direction that simultaneously utilizes their high thermoelectric performance and thermal conductivity,highlighting their great application potential in PV/TE systems.展开更多
Diverse defects in copper indium gallium diselenide solar cells cause nonradiative recombination losses and impair device performance.Here,an organic passivation scheme for surface and grain boundary defects is report...Diverse defects in copper indium gallium diselenide solar cells cause nonradiative recombination losses and impair device performance.Here,an organic passivation scheme for surface and grain boundary defects is reported,which employs an organic passivation agent to infiltrate the copper indium gallium diselenide thin films.A transparent conductive passivating(TCP)film is then developed by incorporating metal nanowires into the organic polymer and used in solar cells.The TCP films have a transmittance of more than 90%in the visible and nearinfrared spectra and a sheet resistance of~10.5Ω/sq.This leads to improvements in the open-circuit voltage and the efficiency of the organic passivated solar cells compared with control cells and paves the way for novel approaches to copper indium gallium diselenide defect passivation and possibly other compound solar cells.展开更多
基金supported by the National Natural Science Foundation of China(Nos.52402048 and 62274054)the“333 project”of Hebei Province(No.C20221014)+6 种基金Hebei Provincial Innovation Capability Enhancement Program Project(No.24464302D)Hebei University President’s Research Fund(No.XZJJ202201)Natural Science Foundation of Hebei Province(Nos.F2023201001 and F2023201005)Interdisciplinary research project of Hebei University(No.DXK202303)the Central Guidance on Local Science and Technology Development Fund Project of Hebei Province(Nos.236Z4307G and 226Z4306G)Hebei province Science Foundation for Distinguished Young Scholars(No.F2021201035)S&T Program of Hebei(No.242Q4501Z).
文摘Photovoltaic/thermoelectric(PV/TE)coupling systems simultaneously cool solar cells and recover waste heat.Single-wall carbon nanotubes(SWCNTs)films are expected to simultaneously exhibit their electrical conductivity,thermal conductivity,and thermoelectric properties in this application.Fabricating SWCNTs films with polymer-dispersed SWCNTs are simple,safe,and scalable.However,the difficulty in simultaneously enhancing both dispersion quality and SWCNT concentration significantly limit the electrical conductivity of these films.Herein,we develop a SWCNT redispersion method in Nafion ethanol system to achieve well-dispersion at high SWCNT concentrations.Using this dispersion,A4-sized films were readily prepared,achieving remarkable electrical conductivity of 1.97 MS/m.The large-area film exhibits a high power factor(654.37μW/(m·K^(2)))and apparent thermal conductivity(529 W/(m·K)),and is integrated into a 330 cm^(2)thermoelectric/photovoltaic coupling system.The PV output power increases by 220 mW.An additional 70 mV thermoelectric voltage is generated.Moreover,the investigation of the drying process unravels how polymer,solvent and SWCNT concentration collectively dominate the film uniformity.This work significantly enhances the electrical conductivity of polymer-dispersed SWCNTs and explores an application direction that simultaneously utilizes their high thermoelectric performance and thermal conductivity,highlighting their great application potential in PV/TE systems.
基金We gratefully acknowledge support from the National Program on Key R&D of China(2018YFB1500201)Key Research and Development Program of Hebei Province(No.20314305D)+9 种基金National Natural Science Foundation of China(62274054)Hebei Province Science Foundation for Distinguished Young Scholars(F2021201035)Top Young Outstanding Innovative Talents Program of Hebei Province(BJ2021006)The Natural Science Foundation of Hebei Province(F2019204325 and F2022201002)"333 project"of Hebei Province(C20221014)the Cooperative Scientific Research Project of“Chunhui Program”of Ministry of Education(2018-7),the Central Guidance on Local Science and Technology Development Fund Project of Hebei Province(No.226Z4306G)Foreign Scientist Joint Research of Hebei province(2021-16)the German Research Foundation(DFG)(FL 834/2-1,FL 834/2-2,FL 834/5-1,and FL 834/7-1)Postgraduate Innovation Funding Project of Hebei University(HBU2021ss068)The High-Performance Computing Platform of Hebei University。
文摘Diverse defects in copper indium gallium diselenide solar cells cause nonradiative recombination losses and impair device performance.Here,an organic passivation scheme for surface and grain boundary defects is reported,which employs an organic passivation agent to infiltrate the copper indium gallium diselenide thin films.A transparent conductive passivating(TCP)film is then developed by incorporating metal nanowires into the organic polymer and used in solar cells.The TCP films have a transmittance of more than 90%in the visible and nearinfrared spectra and a sheet resistance of~10.5Ω/sq.This leads to improvements in the open-circuit voltage and the efficiency of the organic passivated solar cells compared with control cells and paves the way for novel approaches to copper indium gallium diselenide defect passivation and possibly other compound solar cells.
