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Performance enhancement of perovskite solar cells by rhenium doping in nano-TiO_2 compact layer

机译:纳米TiO_2紧凑型铼掺杂的钙钛矿太阳能电池性能提高

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摘要

Researchers' recent attention to perovskite solar cells (PSCs) as the photo-active material is the role of each part layer in PSCs that can play an essential influence in cell performance. The nano-TiO_2 compact thin film as an electron transport layer is rather weak in electrical conductivity and needs to be improved. For the first time, we used TiO_2 by Rhenium (Re) doping for increasing conductivity on enhancing the device performance along with the use of cheap hole-transport material (HTM) like poly (3-hexylthiophene) (P3HT). Device structure based on nano-compact TiO_2 (nano-C-TiO_2) layer being: Glass/FTOano-C-TiO_2/CH_3NH_3Pbl_3/P3HT/Gold. The fill factor (FF) of the devices was improved due to the presence of Re doping of nano-C-TiO_2 in photovoltaic measurements owing to increasing in the shunt resistance (R_(Sh)) and decreasing in the series resistance (R_s). The investigation of devices with impedance spectroscopy offers higher resistance of the doped film due to an increase in R_(Sh) and a decrease in the charge transfer resistance. Results indicated that PSC devices with Re-TiO_2 doping of 2% caused to 25 times (70%) improvement in compared to un-doped TiO_2 with the best device demonstrating power photoelectric conversion efficiency of ca. 19.23%.
机译:研究人员最近关注钙钛矿太阳能电池(PSC),因为光活性物质是每个部分层在PSC中的作用,这可以在细胞性能下发挥基本影响。作为电子传输层的纳米TiO_2紧凑型薄膜在导电性中相当弱,并且需要改善。我们首次使用TiO_2通过铼(RE)掺杂,以提高导电性,因为使用廉价的空穴传输材料(HTM),如Poly(3-己基烯)(P3HT)。基于纳米电压TiO_2(纳米C-TiO_2)层的装置结构:玻璃/ FTO /纳米C-TiO_2 / CH_3NH_3PBL_3 / P3HT /金。由于在分流电阻(R_(SH))增加并在串联电阻(R_S)中,由于在光伏测量中存在纳米C-TiO_2,因此改善了器件的填充因子(FF)。具有阻抗光谱的装置的研究由于R_(SH)的增加和电荷传递电阻的降低而导致掺杂膜的较高电阻。结果表明,与未掺杂的TiO_2相比,具有2%的PSC器件具有2%的2%(70%)改善,具有显示CA的功率光电转换效率的最佳装置。 19.23%。

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