Limited charge carrier lifetime(τ)leads to the short charge carrier diffusion length(L_(D))and thus impedes the improvement of power conversion efficiencies(PCEs)of organic solar cells(OSCs).Herein,anthracene(AN)as t...Limited charge carrier lifetime(τ)leads to the short charge carrier diffusion length(L_(D))and thus impedes the improvement of power conversion efficiencies(PCEs)of organic solar cells(OSCs).Herein,anthracene(AN)as the additive is introduced into classical donor:acceptor pairs to increase theτ.Introducing AN efficiently enhances the crystallinity of the PM 6:BTP-eC 9+blend film to reduce the trap density and increase theτto 1.484μs,achieving the prolonged L_(D).The prolonged L_(D) enables the PM 6:BTP-eC 9+blend film to gain weaker charge carrier recombination,reduced leakage current,and shorter charge carrier extraction time in devices,compared with PM 6:BTP-eC 9 counterparts.Therefore,PM 6:BTP-eC 9+based OSCs achieve higher PCEs of 18.41%±0.16%than PM 6:BTP-eC 9 based ones(17.08%±0.11%).Moreover,the PM 6:L 8-BO+based OSC presents an impressive PCE of 19.14%.It demonstrates that introducing AN is an efficient method to increase theτfor prolonged L_(D),boosting PCEs of OSCs.展开更多
The development of high-performance non-fullerene acceptors with extended exciton diffusion lengths has positioned the sequential layer-by-layer(LBL)solution processing technique as a promising approach for fabricatin...The development of high-performance non-fullerene acceptors with extended exciton diffusion lengths has positioned the sequential layer-by-layer(LBL)solution processing technique as a promising approach for fabricating high-performance and large-area organic solar cells(OSCs).This method allows for the independent dissolution and deposition of donor and acceptor materials,enabling precise morphology control.In this review,we provide a comprehensive overview of the LBL processing technique,focusing on the morphology of the active layer.The swelling intercalation phase-separation(SIPS)model is introduced as the mainstream theory of morphology evolution,with a detailed discussion on vertical phase separation.We summarize recent strategies for morphology optimization.Additionally,we review the progress in LBL-based large-area device and module fabrication,as well as green processing approaches.Finally,we highlight current challenges and future prospects,paving the way for the commercialization of LBL-processed OSCs.展开更多
MXenes are emerging two-dimensional(2D)nanomaterials composed of transition metal carbides and/or nitrides and possess unique layered structures with abundant surface functional groups,which enable them with excellent...MXenes are emerging two-dimensional(2D)nanomaterials composed of transition metal carbides and/or nitrides and possess unique layered structures with abundant surface functional groups,which enable them with excellent and tunable properties.MXenes films can be solution-processed in polar solvents and are very suitable for optoelectronic device applications.Especially,Ti_(3)C_(2)T_(x) MXene with the clear advantages of facile synthesis,flexible surface controlling,easily tunable work function,high optical transmittance and excellent conductivity shows great potential for applications in organic/perovskite optoelectronic devices.Therefore,this review briefly introduces the mainstream synthesis methods,optical and electrical properties of MXenes,and comprehensively summarizes the versatile applications of Ti_(3)C_(2)T_(x) MXene in different functional layers(electrode,interface layer and active layer)of organic/perovskite optoelectronic devices including solar cells and light-emitting diodes.Finally,the current application characteristics and the future possibilities of MXenes in organic/perovskite optoelectronic devices are concluded and discussed.展开更多
煤炭作为储量丰富的碳资源在能源行业中占据重要地位,但传统的煤炭利用方式存在环境污染和效率低等问题。煤及其衍生物富含丰富的稠环芳烃,可通过物理、化学等手段转化为高附加值的低维(零维、一维和二维)碳材料,这有利于推动新能源的...煤炭作为储量丰富的碳资源在能源行业中占据重要地位,但传统的煤炭利用方式存在环境污染和效率低等问题。煤及其衍生物富含丰富的稠环芳烃,可通过物理、化学等手段转化为高附加值的低维(零维、一维和二维)碳材料,这有利于推动新能源的发展以及实现煤炭资源的清洁利用。笔者首先阐述了我国能源与环境现状,以及煤炭资源在“双碳”时代清洁利用的迫切需求;重点介绍了煤基低维碳材料(碳量子点、碳纳米管、石墨烯、碳纳米片等)的结构特点、制备方法、改性策略以及新能源应用和市场前景;阐述了各种煤基低维碳材料制备方法的优缺点、创新性以及适用条件;深入探讨了这些低维碳材料在有机太阳能电池(Organic Solar Cells,OSC)各组分中的各种应用,并详细总结了其作为OSC电极、添加剂以及电荷传输层的应用优势和作用机理;分析了其在提高OSC能量转化效率、降低制造成本、提高稳定性以及推动可持续发展等方面的重要作用;对比了低维碳材料与其他低维材料在OSC中的应用优势和性能指标。最后,分析并总结了煤基低维碳材料在制备和新能源应用研究过程中存在问题及重点研发方向。随着高值碳材料制备技术的不断发展,生产成本的降低,以及规模化生产,煤基低维碳材料有望在新能源领域展现出更广阔的应用前景。展开更多
有机光伏器件(organic photovoltaics,OPVs)相比较于晶硅电池,具有彩色轻柔、半透明和低成本大面积制造等优点而被广泛关注。氧化锌(ZnO)由于在电子输运、环境友好和低温溶液加工等方面的优势而成为OPVs电子传输层(electron transport l...有机光伏器件(organic photovoltaics,OPVs)相比较于晶硅电池,具有彩色轻柔、半透明和低成本大面积制造等优点而被广泛关注。氧化锌(ZnO)由于在电子输运、环境友好和低温溶液加工等方面的优势而成为OPVs电子传输层(electron transport layer,ETL)的关键材料之一。但是,ZnO纳米颗粒通常有大量的表面缺陷而影响其载流子传输性,其电学性能有待进一步提升。因此,通过混合溶液法利用不同浓度硼酸与氧化锌溶液直接混合涂覆成膜,调节与优化两者混合比例,研究硼掺杂ZnO作为ETL(B-ZnO)对OPVs光电性能的影响。当掺杂比例为8%时,B-ZnO基OPVs在一个标准太阳光下的最高能量转换效率达到了8.76%,相比于ZnO基器件(8.10%)提升了8.2%。这归因于硼酸的掺杂使ZnO ETL获得了更好的表面形貌和更优的电学性质,减少了界面缺陷态密度和增加了器件的内建电势,从而进一步提高了OPVs性能。该研究为便捷的ZnO元素掺杂在高效OPVs中的应用提供了新的思路和方法。展开更多
近年来,钙钛矿太阳能电池(Perovskite solar cells,PSCs)由于具有光伏性能优异、材料成本低、制造工艺简单等优势,引起了科研工作者广泛的研究兴趣。在PSCs中,电子传输层(Electron transport layer,ETL)在提取和传输光生电子方面起着至...近年来,钙钛矿太阳能电池(Perovskite solar cells,PSCs)由于具有光伏性能优异、材料成本低、制造工艺简单等优势,引起了科研工作者广泛的研究兴趣。在PSCs中,电子传输层(Electron transport layer,ETL)在提取和传输光生电子方面起着至关重要的作用。氧化锡(SnO_(2))由于具有高光学透过率、高电子迁移率、良好的化学稳定性、合理的能级结构和可低温制备等优异性能,成为PSCs器件中理想的ETL。本文围绕SnO_(2) ETL在正置PSCs中的研究进展进行综述,首先介绍了SnO_(2)的结构与光电特性,并归纳了SnO_(2)的制备方法,随后对有机无机杂化PSCs及全无机PSCs中SnO_(2) ETL的改性进行了详细的阐述和总结,包括掺杂及界面修饰处理,最后总结全文,对SnO_(2) ETL的发展进行展望。展开更多
基金Projects(52272056,52372056,52232003)supported by the National Natural Science Foundation of ChinaProject(2023RC3044)supported by the Science and Technology Innovation Program of Hunan Province,China。
文摘Limited charge carrier lifetime(τ)leads to the short charge carrier diffusion length(L_(D))and thus impedes the improvement of power conversion efficiencies(PCEs)of organic solar cells(OSCs).Herein,anthracene(AN)as the additive is introduced into classical donor:acceptor pairs to increase theτ.Introducing AN efficiently enhances the crystallinity of the PM 6:BTP-eC 9+blend film to reduce the trap density and increase theτto 1.484μs,achieving the prolonged L_(D).The prolonged L_(D) enables the PM 6:BTP-eC 9+blend film to gain weaker charge carrier recombination,reduced leakage current,and shorter charge carrier extraction time in devices,compared with PM 6:BTP-eC 9 counterparts.Therefore,PM 6:BTP-eC 9+based OSCs achieve higher PCEs of 18.41%±0.16%than PM 6:BTP-eC 9 based ones(17.08%±0.11%).Moreover,the PM 6:L 8-BO+based OSC presents an impressive PCE of 19.14%.It demonstrates that introducing AN is an efficient method to increase theτfor prolonged L_(D),boosting PCEs of OSCs.
基金Project(22408404)supported by the National Natural Science Foundation of China。
文摘The development of high-performance non-fullerene acceptors with extended exciton diffusion lengths has positioned the sequential layer-by-layer(LBL)solution processing technique as a promising approach for fabricating high-performance and large-area organic solar cells(OSCs).This method allows for the independent dissolution and deposition of donor and acceptor materials,enabling precise morphology control.In this review,we provide a comprehensive overview of the LBL processing technique,focusing on the morphology of the active layer.The swelling intercalation phase-separation(SIPS)model is introduced as the mainstream theory of morphology evolution,with a detailed discussion on vertical phase separation.We summarize recent strategies for morphology optimization.Additionally,we review the progress in LBL-based large-area device and module fabrication,as well as green processing approaches.Finally,we highlight current challenges and future prospects,paving the way for the commercialization of LBL-processed OSCs.
基金Projects(52063010,51961010)supported by the National Natural Science Foundation of China。
文摘MXenes are emerging two-dimensional(2D)nanomaterials composed of transition metal carbides and/or nitrides and possess unique layered structures with abundant surface functional groups,which enable them with excellent and tunable properties.MXenes films can be solution-processed in polar solvents and are very suitable for optoelectronic device applications.Especially,Ti_(3)C_(2)T_(x) MXene with the clear advantages of facile synthesis,flexible surface controlling,easily tunable work function,high optical transmittance and excellent conductivity shows great potential for applications in organic/perovskite optoelectronic devices.Therefore,this review briefly introduces the mainstream synthesis methods,optical and electrical properties of MXenes,and comprehensively summarizes the versatile applications of Ti_(3)C_(2)T_(x) MXene in different functional layers(electrode,interface layer and active layer)of organic/perovskite optoelectronic devices including solar cells and light-emitting diodes.Finally,the current application characteristics and the future possibilities of MXenes in organic/perovskite optoelectronic devices are concluded and discussed.
文摘煤炭作为储量丰富的碳资源在能源行业中占据重要地位,但传统的煤炭利用方式存在环境污染和效率低等问题。煤及其衍生物富含丰富的稠环芳烃,可通过物理、化学等手段转化为高附加值的低维(零维、一维和二维)碳材料,这有利于推动新能源的发展以及实现煤炭资源的清洁利用。笔者首先阐述了我国能源与环境现状,以及煤炭资源在“双碳”时代清洁利用的迫切需求;重点介绍了煤基低维碳材料(碳量子点、碳纳米管、石墨烯、碳纳米片等)的结构特点、制备方法、改性策略以及新能源应用和市场前景;阐述了各种煤基低维碳材料制备方法的优缺点、创新性以及适用条件;深入探讨了这些低维碳材料在有机太阳能电池(Organic Solar Cells,OSC)各组分中的各种应用,并详细总结了其作为OSC电极、添加剂以及电荷传输层的应用优势和作用机理;分析了其在提高OSC能量转化效率、降低制造成本、提高稳定性以及推动可持续发展等方面的重要作用;对比了低维碳材料与其他低维材料在OSC中的应用优势和性能指标。最后,分析并总结了煤基低维碳材料在制备和新能源应用研究过程中存在问题及重点研发方向。随着高值碳材料制备技术的不断发展,生产成本的降低,以及规模化生产,煤基低维碳材料有望在新能源领域展现出更广阔的应用前景。
文摘有机光伏器件(organic photovoltaics,OPVs)相比较于晶硅电池,具有彩色轻柔、半透明和低成本大面积制造等优点而被广泛关注。氧化锌(ZnO)由于在电子输运、环境友好和低温溶液加工等方面的优势而成为OPVs电子传输层(electron transport layer,ETL)的关键材料之一。但是,ZnO纳米颗粒通常有大量的表面缺陷而影响其载流子传输性,其电学性能有待进一步提升。因此,通过混合溶液法利用不同浓度硼酸与氧化锌溶液直接混合涂覆成膜,调节与优化两者混合比例,研究硼掺杂ZnO作为ETL(B-ZnO)对OPVs光电性能的影响。当掺杂比例为8%时,B-ZnO基OPVs在一个标准太阳光下的最高能量转换效率达到了8.76%,相比于ZnO基器件(8.10%)提升了8.2%。这归因于硼酸的掺杂使ZnO ETL获得了更好的表面形貌和更优的电学性质,减少了界面缺陷态密度和增加了器件的内建电势,从而进一步提高了OPVs性能。该研究为便捷的ZnO元素掺杂在高效OPVs中的应用提供了新的思路和方法。
文摘近年来,钙钛矿太阳能电池(Perovskite solar cells,PSCs)由于具有光伏性能优异、材料成本低、制造工艺简单等优势,引起了科研工作者广泛的研究兴趣。在PSCs中,电子传输层(Electron transport layer,ETL)在提取和传输光生电子方面起着至关重要的作用。氧化锡(SnO_(2))由于具有高光学透过率、高电子迁移率、良好的化学稳定性、合理的能级结构和可低温制备等优异性能,成为PSCs器件中理想的ETL。本文围绕SnO_(2) ETL在正置PSCs中的研究进展进行综述,首先介绍了SnO_(2)的结构与光电特性,并归纳了SnO_(2)的制备方法,随后对有机无机杂化PSCs及全无机PSCs中SnO_(2) ETL的改性进行了详细的阐述和总结,包括掺杂及界面修饰处理,最后总结全文,对SnO_(2) ETL的发展进行展望。
