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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >A-D-A-type S,N-heteropentacene-based hole transport materials for dopant-free perovskite solar cells
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A-D-A-type S,N-heteropentacene-based hole transport materials for dopant-free perovskite solar cells

机译：用于无掺杂钙钛矿太阳能电池的A-D-A型S，N-异戊四烯基空穴传输材料

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摘要

This work reports the design and synthesis of acceptor-donor-acceptor (A-D-A) type low band gap hole transport materials (HTM) comprising S,N-heteropentacene central units for solid-state perovskite-based solar cells. The optical and electrochemical properties were tuned by the insertion of thiophene or ethylenedioxythiophene units in the molecular backbone. These HTMs showed strong absorption in the visible region and suitable highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energies with respect to the CH3NH3PbI3 perovskite. Mesoscopic solid state perovskite solar cells prepared by solution-processing using these HTMs generated power conversion efficiencies (PCE) of 10.3-11.4% without the use of any additive or dopant. The charge transfer behavior between photoexcited perovskite and the HTMs was further investigated by photo-induced absorption spectroscopy.
机译：这项工作报告了固态含钙钛矿型太阳能电池用受主-供体-受体（A-D-A）型低带隙空穴传输材料（HTM）的设计和合成，该材料包括S，N-异戊四烯中心单元。通过在分子主链中插入噻吩或亚乙基二氧噻吩单元来调节光学和电化学性质。这些HTM在可见光区域显示出强吸收性，并且相对于CH3NH3PbI3钙钛矿而言，具有合适的最高占据分子轨道（HOMO）和最低未占据分子轨道（LUMO）能量。通过使用这些HTM进行溶液处理制备的介观固态钙钛矿太阳能电池在不使用任何添加剂或掺杂剂的情况下产生了10.3-11.4％的功率转换效率（PCE）。通过光诱导吸收光谱进一步研究了光激发钙钛矿和HTM之间的电荷转移行为。

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