During the last decade,perovskite solar technologies underwent an impressive development,with power conversion efficiencies reaching 25.5%for single-junction devices and 29.8%for Silicon-Perovskite tandem configuratio...During the last decade,perovskite solar technologies underwent an impressive development,with power conversion efficiencies reaching 25.5%for single-junction devices and 29.8%for Silicon-Perovskite tandem configurations.Even though research mainly focused on improving the efficiency of perovskite photovoltaics(PV),stability and scalability remain fundamental aspects of a mature photovoltaics technology.For n-i-p structure perovskite solar cells,using poly-triaryl(amine)(PTAA)as hole transport layer(HTL)allowed to achieve marked improvements in device stability compared with other common hole conductors.For p-i-n structure,poly-triaryl(amine)is also routinely used as dopant-free hole transport layer,but problems in perovskite film growth,and its limited resistance to stress and imperfect batch-to-batch reproducibility,hamper its use for device upscaling.Following previous computational investigations,in this work,we report the synthesis of two small-molecule organic hole transport layers(BPT-1,2),aiming to solve the above-mentioned issues and allow upscale to the module level.By using BPT-1 and methylammonium-free perovskite,max.Power conversion efficiencies of 17.26%and 15.42%on a small area(0.09 cm^(2))and mini-module size(2.25 cm^(2)),respectively,were obtained,with a better reproducibility than with poly-triaryl(amine).Moreover,BPT-1 was demonstrated to yield more stable devices compared with poly-triaryl(amine)under ISOS-D1,T1,and L1 accelerated life-test protocols,reaching maximum T_(90)values>1000 h on all tests.展开更多
In the contemporary preparation of perovskite solar cells(PSCs),the prevalent issue of hole transport layers(HTLs)materials is frequently incompatible with large-area deposition techniques.As the area increases,this r...In the contemporary preparation of perovskite solar cells(PSCs),the prevalent issue of hole transport layers(HTLs)materials is frequently incompatible with large-area deposition techniques.As the area increases,this results in nonuniform preparation of the HTLs,which significantly reduces the efficiency and reliability of the device at the module level.To tackle this significant challenge,we propose a strategy for a dual-fiber network structure based on polymer HTLs.This strategy involves the use of organic solar cell polymer donor material(PM6)and poly(3-hexylthiophene)(P3HT),which are spontaneously interwoven into micronsized fiber crystals to establish efficient carrier transport channels.This unique structure not only accelerates charge extraction but also takes advantage of the inherent benefits of polymers,such as excellent printability and homogeneous film formation while enhancing the protection of the perovskite layers.The resulting devices demonstrate a VOC of 1.18 V and a champion PCE of 24.90%,which is higher than the pristine devices(the PCE is 22.87%).Moreover,due to the improved printing characteristics,the PSMs prepared by blade-coating also demonstrate a high PCE of 15.15%within an aperture area of 100 cm^(2).Additionally,this strategy significantly improves the operational stability,thermal stability,and humidity stability of the devices.展开更多
基金funding from the Italian Ministry of Economic Development(MISE)in the framework of the Operating Agreement with ENEA for Research on the Electric Systemfrom the Italian Ministry of University and Research(MUR)in the framework of“BEST4U”Project,PON R&I 2014-2020.L.V.,M.S.+2 种基金A.D.C.were supported by the European Union's Horizon 2020 Framework Program for funding Research and Innovation under grant agreement no.764047(ESPResSo)no.691664(UNIQUE,Cofund ERANET Action,MUR GA 775970)no.826013(IMPRESSIVE).C.C.and A.S.acknowledge MIUR Grant—Department of Excellence 2018-2022 and the European Union's Horizon 2020 Framework Program for funding Research and Innovation under grant agreement no.764047(ESPResSo).
文摘During the last decade,perovskite solar technologies underwent an impressive development,with power conversion efficiencies reaching 25.5%for single-junction devices and 29.8%for Silicon-Perovskite tandem configurations.Even though research mainly focused on improving the efficiency of perovskite photovoltaics(PV),stability and scalability remain fundamental aspects of a mature photovoltaics technology.For n-i-p structure perovskite solar cells,using poly-triaryl(amine)(PTAA)as hole transport layer(HTL)allowed to achieve marked improvements in device stability compared with other common hole conductors.For p-i-n structure,poly-triaryl(amine)is also routinely used as dopant-free hole transport layer,but problems in perovskite film growth,and its limited resistance to stress and imperfect batch-to-batch reproducibility,hamper its use for device upscaling.Following previous computational investigations,in this work,we report the synthesis of two small-molecule organic hole transport layers(BPT-1,2),aiming to solve the above-mentioned issues and allow upscale to the module level.By using BPT-1 and methylammonium-free perovskite,max.Power conversion efficiencies of 17.26%and 15.42%on a small area(0.09 cm^(2))and mini-module size(2.25 cm^(2)),respectively,were obtained,with a better reproducibility than with poly-triaryl(amine).Moreover,BPT-1 was demonstrated to yield more stable devices compared with poly-triaryl(amine)under ISOS-D1,T1,and L1 accelerated life-test protocols,reaching maximum T_(90)values>1000 h on all tests.
基金supported by the National Key R&D Program of China:Strategic International Innovation Cooperation(2024YFE0209400)the National Natural Science Foundation of China(NSFC)(52222312,52173169,22461142139,52263027,22379060,52203311,and 52463021)the Natural Science Foundation of Jiangxi Province(20231ZDH04036,20224ACB204007).
文摘In the contemporary preparation of perovskite solar cells(PSCs),the prevalent issue of hole transport layers(HTLs)materials is frequently incompatible with large-area deposition techniques.As the area increases,this results in nonuniform preparation of the HTLs,which significantly reduces the efficiency and reliability of the device at the module level.To tackle this significant challenge,we propose a strategy for a dual-fiber network structure based on polymer HTLs.This strategy involves the use of organic solar cell polymer donor material(PM6)and poly(3-hexylthiophene)(P3HT),which are spontaneously interwoven into micronsized fiber crystals to establish efficient carrier transport channels.This unique structure not only accelerates charge extraction but also takes advantage of the inherent benefits of polymers,such as excellent printability and homogeneous film formation while enhancing the protection of the perovskite layers.The resulting devices demonstrate a VOC of 1.18 V and a champion PCE of 24.90%,which is higher than the pristine devices(the PCE is 22.87%).Moreover,due to the improved printing characteristics,the PSMs prepared by blade-coating also demonstrate a high PCE of 15.15%within an aperture area of 100 cm^(2).Additionally,this strategy significantly improves the operational stability,thermal stability,and humidity stability of the devices.
