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首页> 外文期刊>RSC Advances >Solid-state dye-sensitized solar cells based on Zn1?xSnxO nanocomposite photoanodes
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Solid-state dye-sensitized solar cells based on Zn1?xSnxO nanocomposite photoanodes

机译：基于Zn1？xSnxO纳米复合光阳极的固态染料敏化太阳能电池

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Solid-state dye-sensitized solar cells (ss-DSSCs) comprising Sn ~(2+) -substituted ZnO nanopowder were purposefully tailored via a co-precipitation method. The solar cells assembled in this work were sensitized with N719 ruthenium dye and insinuated with spiro-OMeTAD as a solid hole transport layer (HTL). Evidently, significant enhancement in cell efficiency was accomplished with Sn ~(2+) ions-substituted ZnO photoelectrodes by maintaining the weight ratio of SnO at 5%. The overall power conversion efficiency was improved from 3.0% for the cell with pure ZnO to 4.3% for the cell with 5% SnO substitution. The improvement in the cell efficiency with Sn ~(2+) -substituted ZnO photoelectrodes is attributed to the considerably large surface area of the nanopowders for dye adsorption, efficient charge separation and the suppression of charge recombination provided by SnO. Furthermore, the energy distinction between the conduction band edges of SnO and ZnO implied a type II band alignment. Moreover, the durability as well as the stability of 15 assembled cells were studied to show the outstanding long-term stability of the devices made of Sn ~(2+) ion substituted ZnO, and the PCE of each cell remained stable and ～96% of its primary value was retained for up to 100 h. Subsequently, the efficacy was drastically reduced to ～35% after 250 h of storage.
机译：通过共沉淀法有针对性地定制了包含Sn〜（2+）取代的ZnO纳米粉的固态染料敏化太阳能电池（ss-DSSC）。在这项工作中组装的太阳能电池用N719钌染料敏化，并用spiro-OMeTAD表示为固体空穴传输层（HTL）。显然，通过将SnO的重量比保持在5％，Sn〜（2+）离子取代的ZnO光电极可实现电池效率的显着提高。总功率转换效率从纯ZnO电池的3.0％提高到了SnO取代率5％的电池4.3％。 Sn〜（2+）取代的ZnO光电极对电池效率的提高归因于纳米粉体的较大表面积，可用于染料吸附，有效的电荷分离和抑制SnO提供的电荷重组。此外，SnO和ZnO的导带边缘之间的能量区别意味着II型带取向。此外，对15个组装电池的耐久性和稳定性进行了研究，以显示由Sn〜（2+）离子取代的ZnO制成的器件具有出色的长期稳定性，每个电池的PCE保持稳定，约为〜96％其原始值的最大保留时间为100小时。随后，在储存250小时后，药效急剧降低至35％。

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