Perovskite solar cells(PSCs) have emerged as one of the most promising candidates for photovoltaic applications. Low-cost, low-temperature solution processes including coating and printing techniques makes PSCs promis...Perovskite solar cells(PSCs) have emerged as one of the most promising candidates for photovoltaic applications. Low-cost, low-temperature solution processes including coating and printing techniques makes PSCs promising for the greatly potential commercialization due to the scalability and compatibility with large-scale, roll-to-roll manufacturing processes. In this review, we focus on the solution deposition of charge transport layers and perovskite absorption layer in both mesoporous and planar structural PSC devices. Furthermore, the most recent design strategies via solution deposition are presented as well, which have been explored to enlarge the active area, enhance the crystallization and passivate the defects, leading to the performance improvement of PSC devices.展开更多
Both of planar and mesoporous architectures prevail for perovskite solar cells(PSCs).However,it is still an open question how the architecture affects the performance of PSCs.The inconsistent results in the references...Both of planar and mesoporous architectures prevail for perovskite solar cells(PSCs).However,it is still an open question how the architecture affects the performance of PSCs.The inconsistent results in the references often create confusion.In particular,the specific roles of mesoporous frameworks are yet to be well elaborated and require further clarification.In this study,we carefully compared the properties of perovskite films and the device performances for both architectures to unravel the roles of mesoporous TiO2 framworks in CH3NH3PbI3 PSCs.The detailed characterizations of structural,microscopic,optical and electrical properties revealed that the presence of mesoporous TiO2 framework contributed to enlarged perovskite crystal sizes,enhanced light harvesting,efficient electron extration and suppressed charge recombination.As a result,compared with the planar device,the mesoporous device yielded an improved power conversion efficiency of 18.18%,coupled with a reduced hystersis.This study reveals the benefits of mesoporous TiO2 framework in PSCs and provides the guidance for the design and optimization of architectures for high-performance devices.展开更多
Here,the interfacial synergism of discontinuous spot shaped SnO_2 and TiO_2 mesoporous nanocomposite as electron transfer layer（ETL） underlayer is presented in highly efficient mesoscopic perovskite solar cells（M-P...Here,the interfacial synergism of discontinuous spot shaped SnO_2 and TiO_2 mesoporous nanocomposite as electron transfer layer（ETL） underlayer is presented in highly efficient mesoscopic perovskite solar cells（M-PSCs）. Based on this new strategy,strong charge recombination observed in previous SnO_2-based ETLs is suppressed to a great extent as the pathways of charge recombination and energy loss are blocked effectively. Meanwhile,the internal series resistance of entire M-PSC is decreased remarkably. The new ETL is more kinetically favorable to electron transfer and thus results in significant photovoltaic improvement and alleviated hysteresis effect of M-PSCs.展开更多
文摘目的评价载银(Ag)或锌(Zn)的介孔钙硅纳米粒子(mesoporous calcium-silicate nanoparticles,MCSNs)和聚己内酯(poly-ε-caprolactone,PCL)的复合材料的理化性能、体外生物活性及促进成骨能力。方法通过加热熔融法制备PCL-MCSNs、PCL-Zn-MCSNs、PCL-Ag-MCSNs和PCL-Ag-Zn-MCSNs(Ag与Zn物质的量比为1∶1),表征其表面形貌、机械性能和体外降解性能。复合材料与根尖乳头干细胞(stem cell from the apical papilla,SCAP)共培养,观察其表面的细胞附着和羟磷灰石晶体(hydroxyapatite,HA)形成情况。通过CCK-8法、碱性磷酸酶(ALP)活性测定和茜素红染色,评价材料的细胞毒性和促进体外成骨效果。结果所有复合材料的表面平整均匀,PCL-MCSNs的压缩强度最高,为3.05 MPa。PCL-Zn-MCSNs的表面HA形成最多、降解最快、表面附着的细胞密度最高,细胞粘附性最好。除PCL-Ag-MCSNs和PCL-Ag-Zn-MCSNs外,其他实验组都能促进细胞增殖,ALP活性升高,产生的钙化结节含量均高于PCL,其中PCL-Zn-MCSNs显著高于其他组(P<0.05)。结论PCL和载银或锌的MCSNs的复合材料具有良好的机械性能和降解性能,但细胞粘附性、细胞增殖性、ALP活性和钙化结节形成能力随Zn含量增加而增强,提示含Zn的该类型复合材料的体外生物活性良好,在促成牙/成骨方面有着优越的潜能,有望成为新型的口腔颌面骨缺损的修复材料。
基金Projects(51673214,51673218,61774170)supported by the National Natural Science Foundation of ChinaProject(2017YFA0206600)supported by the National Key Research and Development Program of China。
文摘Perovskite solar cells(PSCs) have emerged as one of the most promising candidates for photovoltaic applications. Low-cost, low-temperature solution processes including coating and printing techniques makes PSCs promising for the greatly potential commercialization due to the scalability and compatibility with large-scale, roll-to-roll manufacturing processes. In this review, we focus on the solution deposition of charge transport layers and perovskite absorption layer in both mesoporous and planar structural PSC devices. Furthermore, the most recent design strategies via solution deposition are presented as well, which have been explored to enlarge the active area, enhance the crystallization and passivate the defects, leading to the performance improvement of PSC devices.
基金financially supported by the National Natural Science Foundation of China(51602088)the Open Fund of the Key Laboratory of Photovoltaic and Energy Conservation Materials,Chinese Academy of Sciences(PECL2019KF007)and China Postdoctoral Science Foundation(2017T100313)。
文摘Both of planar and mesoporous architectures prevail for perovskite solar cells(PSCs).However,it is still an open question how the architecture affects the performance of PSCs.The inconsistent results in the references often create confusion.In particular,the specific roles of mesoporous frameworks are yet to be well elaborated and require further clarification.In this study,we carefully compared the properties of perovskite films and the device performances for both architectures to unravel the roles of mesoporous TiO2 framworks in CH3NH3PbI3 PSCs.The detailed characterizations of structural,microscopic,optical and electrical properties revealed that the presence of mesoporous TiO2 framework contributed to enlarged perovskite crystal sizes,enhanced light harvesting,efficient electron extration and suppressed charge recombination.As a result,compared with the planar device,the mesoporous device yielded an improved power conversion efficiency of 18.18%,coupled with a reduced hystersis.This study reveals the benefits of mesoporous TiO2 framework in PSCs and provides the guidance for the design and optimization of architectures for high-performance devices.
基金supported by the National Natural Science Foundation of China(51402036,51273104 and 91433205)the International Science&Technology Cooperation Program of China(2013DFA51000)
文摘Here,the interfacial synergism of discontinuous spot shaped SnO_2 and TiO_2 mesoporous nanocomposite as electron transfer layer（ETL） underlayer is presented in highly efficient mesoscopic perovskite solar cells（M-PSCs）. Based on this new strategy,strong charge recombination observed in previous SnO_2-based ETLs is suppressed to a great extent as the pathways of charge recombination and energy loss are blocked effectively. Meanwhile,the internal series resistance of entire M-PSC is decreased remarkably. The new ETL is more kinetically favorable to electron transfer and thus results in significant photovoltaic improvement and alleviated hysteresis effect of M-PSCs.
