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SFX as a low-cost 'Spiro' hole-transport material for efficient perovskite solar cells

机译:SFX作为低成本“螺旋”空穴传输材料,用于高效钙钛矿太阳能电池

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摘要

Four spiro[fluorene-9,9′-xanthene] (SFX) derivatives, SFX-TAD, SFX-TCz, SFX-TPTZ and SFX-MeOTAD have been synthesized for use as hole-transport materials and fully characterized by 1H/13C NMR spectroscopy, mass spectrometry, XRD and DSC. Their thermal, optical and electrochemical properties were investigated. The use of different substituents affects the highest occupied molecular orbital (HOMO) energy level proving the versatility of the central core towards the facile and low-cost preparation of spiro-hole-transport materials. Among the synthesized SFX derivatives, SFX-MeOTAD was employed as hole-transporting material (HTM) and the performance tested in perovskite solar cells with device architecture glass/FTO/compact TiO2/mesoporous Al2O3/CH3NH3PbI3-xClx/HTM/Au. SFX-MeOTAD gave a comparable efficiency to spiro-MeOTAD, demonstrating great potential for use of the SFX family as cost effective and versatile hole conductors facilitating commercialization of perovskite solar cells (PSCs).
机译:合成了四种螺[芴-9,9'-x吨](SFX)衍生物SFX-TAD,SFX-TCz,SFX-TPTZ和SFX-MeOTAD,用作空穴传输材料,并通过1H / 13C NMR进行了全面表征光谱,质谱,XRD和DSC。研究了它们的热,光学和电化学性能。使用不同的取代基会影响最高占据分子轨道(HOMO)的能级,从而证明中心核具有通用性,可方便,低成本地制备螺孔传输材料。在合成的SFX衍生物中,将SFX-MeOTAD用作空穴传输材料(HTM),并在具有器件结构玻璃/ FTO /紧凑TiO2 /介孔Al2O3 / CH3NH3PbI3-xClx / HTM / Au的钙钛矿太阳能电池中测试了性能。 SFX-MeOTAD的效率与spiro-MeOTAD相当,证明了SFX系列作为具有成本效益的多功能空穴导体的巨大潜力,可促进钙钛矿太阳能电池(PSC)的商业化。

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