SiO2 nanoparticles were used to regulate the crystallizing process of lead halide perovskite films prepared by the sequential deposition method,which was used in the low-temperature-processed,carbon-electrode-basing,h...SiO2 nanoparticles were used to regulate the crystallizing process of lead halide perovskite films prepared by the sequential deposition method,which was used in the low-temperature-processed,carbon-electrode-basing,hole-conductor-free planar perovskite solar cells.It was observed that,after adding small amount of SiO2 precursor(1 vol%)into the lead iodide solution,performance parameters of open-circuit voltage,short-circuit current and fill factor were all upgraded,which helped to increase the power conversion efficiency(reverse scan)from 11.44(±1.83)%(optimized at 12.42%)to 14.01(±2.14)%(optimized at 15.28%,AM 1.5G,100 mW/cm^2).Transient photocurrent decay curve measurements showed that,after the incorporation of SiO2 nanoparticles,charge extraction was accelerated,while transient photovoltage decay and dark current curve tests both showed that recombination was retarded.The improvement is due to the improved crystallinity of the perovskite film.X-ray diffraction and scanning electron microscopy studies observed that,with incorporation of amorphous SiO2 nanoparticles,smaller crystallites were obtained in lead iodide films,while larger crystallites were achieved in the final perovskite film.This study implies that amorphous SiO2 nanoparticles could regulate the coarsening process of the perovskite film,which provides an effective method in obtaining high quality perovskite film.展开更多
介观太阳能电池(Mesoscopic Solar Cells)作为新一代太阳能电池的突出代表,具有原材料来源丰富,制备工艺简单,光电转换效率高等优点,从而具有广阔的应用前景.本工作简要评述了全固态介观太阳能电池从染料敏化太阳能电池(Dye-sensitized ...介观太阳能电池(Mesoscopic Solar Cells)作为新一代太阳能电池的突出代表,具有原材料来源丰富,制备工艺简单,光电转换效率高等优点,从而具有广阔的应用前景.本工作简要评述了全固态介观太阳能电池从染料敏化太阳能电池(Dye-sensitized solar cells)发展到钙钛矿太阳能电池(Perovskite solar cells)过程中新材料、新技术和新概念的研究进展.1998年,Gr?tzel课题组首次将固态有机空穴传输材料spiro-OMeTAD应用到染料敏化太阳能电池中,制备出全固态染料敏化太阳能电池,虽然仅获得了0.74%的光电转换效率,但是却使得全固态染料敏化太阳能电池迅速发展成为介观太阳能电池的重要研究方向.2012年,Park与Gr?tzel课题组合作,使用钙钛矿型吸光材料(CH3NH3)PbI3作为敏化剂,spiro-OMeTAD作为空穴收集层,制备出光电转换效率达到9.7%的全固态介观太阳能电池,又被称为钙钛矿太阳能电池.自此,基于钙钛矿材料的介观太阳能电池迅速成为太阳能电池领域的研究热点.目前,钙钛矿太阳能电池的最高公证效率已经达到20.1%.钙钛矿太阳能电池作为介观太阳能电池商业化道路上里程碑式的突破,在材料开发、界面优化以及器件稳定性方面的研究仍充满挑战,也期待新的突破.展开更多
基金Project supported by the Fundamental Research Funds for the Central South University,China(Grant No.2019zzts426)the National Natural Science Foundation of China(Grant Nos.61172047,61774170,and 51673218)+1 种基金the Scientific and Technological Project of Hunan Provincial Development and Reform Commission,China,the National Science Foundation,USA(Grant Nos.CBET-1437656 and DMR-1903962)the Innovation-Driven Project of Central South University(Grant No.2020CX006)。
文摘SiO2 nanoparticles were used to regulate the crystallizing process of lead halide perovskite films prepared by the sequential deposition method,which was used in the low-temperature-processed,carbon-electrode-basing,hole-conductor-free planar perovskite solar cells.It was observed that,after adding small amount of SiO2 precursor(1 vol%)into the lead iodide solution,performance parameters of open-circuit voltage,short-circuit current and fill factor were all upgraded,which helped to increase the power conversion efficiency(reverse scan)from 11.44(±1.83)%(optimized at 12.42%)to 14.01(±2.14)%(optimized at 15.28%,AM 1.5G,100 mW/cm^2).Transient photocurrent decay curve measurements showed that,after the incorporation of SiO2 nanoparticles,charge extraction was accelerated,while transient photovoltage decay and dark current curve tests both showed that recombination was retarded.The improvement is due to the improved crystallinity of the perovskite film.X-ray diffraction and scanning electron microscopy studies observed that,with incorporation of amorphous SiO2 nanoparticles,smaller crystallites were obtained in lead iodide films,while larger crystallites were achieved in the final perovskite film.This study implies that amorphous SiO2 nanoparticles could regulate the coarsening process of the perovskite film,which provides an effective method in obtaining high quality perovskite film.
文摘介观太阳能电池(Mesoscopic Solar Cells)作为新一代太阳能电池的突出代表,具有原材料来源丰富,制备工艺简单,光电转换效率高等优点,从而具有广阔的应用前景.本工作简要评述了全固态介观太阳能电池从染料敏化太阳能电池(Dye-sensitized solar cells)发展到钙钛矿太阳能电池(Perovskite solar cells)过程中新材料、新技术和新概念的研究进展.1998年,Gr?tzel课题组首次将固态有机空穴传输材料spiro-OMeTAD应用到染料敏化太阳能电池中,制备出全固态染料敏化太阳能电池,虽然仅获得了0.74%的光电转换效率,但是却使得全固态染料敏化太阳能电池迅速发展成为介观太阳能电池的重要研究方向.2012年,Park与Gr?tzel课题组合作,使用钙钛矿型吸光材料(CH3NH3)PbI3作为敏化剂,spiro-OMeTAD作为空穴收集层,制备出光电转换效率达到9.7%的全固态介观太阳能电池,又被称为钙钛矿太阳能电池.自此,基于钙钛矿材料的介观太阳能电池迅速成为太阳能电池领域的研究热点.目前,钙钛矿太阳能电池的最高公证效率已经达到20.1%.钙钛矿太阳能电池作为介观太阳能电池商业化道路上里程碑式的突破,在材料开发、界面优化以及器件稳定性方面的研究仍充满挑战,也期待新的突破.
