Two hole transporting materials (HTMs), SFX-PT1 and SFX-PT2, were designed and synthesized by combing a spiro[fluorene-9, 9′-xanthene] (SFX) core with tetra- phenothiazine substituted at the 2,2′,7,7′- and 2,3′,6,′7-positions, respectively. As comparison, a HTM with tetra-phenothiazine substituted at the 2,2′,7,7′-positions of a 9, 9′-spirobifluorene core (Spiro-PT) was also synthesized. Their photophysical and electrochemical properties, thermal stability and hole mobility were investigated. It was demonstrated that SFX-centered HTMs exhibited superior Stokes shift, thermal stability and hole mobility than those of Spiro-PT. Combining with the substituted positions modification, SFX-PT1 has the largest Stokes shift of 197 nm, the highest decomposition temperature of 435 °C and hole mobility of 2.08 × 10⁻³ cm²V⁻¹S⁻¹. Moreover, the energy levels of the HTMs were matched very well with that of CH₃NH₃PbI₃. Our results indicated that SFX-centered, phenothiazole substituted HTMs might be potential candidates for efficient perovskite solar cells.

设计并合成了两种空穴传输材料（HTM）SFX-PT1和SFX-PT2，方法是将螺[芴-9，9'-吨]（SFX）核与在2,2'处取代的四吩噻嗪组合， 7,7'-和2,3'，6，'7-位置。作为比较，还合成了在9，9'-螺二芴核心（Spiro-PT）的2,2'，7,7'-位处有四吩噻嗪取代的HTM 。研究了它们的光物理和电化学性质，热稳定性和空穴迁移率。事实证明，以SFX为中心的HTM具有比Spiro-PT更好的斯托克斯位移，热稳定性和空穴迁移率。结合替代位置修改，SFX-PT1最大斯托克斯位移为197 nm，最高分解温度为435°C，空穴迁移率为2.08×10 ^-3  cm ² V ^-1 S ^-1。此外，HTM的能级与CH ₃ NH ₃ PbI ₃的能级非常匹配。我们的结果表明，以SFX为中心的吩噻唑取代的HTM可能是高效钙钛矿太阳能电池的潜在候选者。