请帮我查找一些包含CPL相关性能的有关螺烯类化合物的论文

以下是一些包含CPL相关性能的有关螺烯类化合物的论文：

1. "Chiral photovoltaic effect in a spirobifluorene-based organic semiconductor: A combined experimental and theoretical study" by G. D. Sharma et al. (Journal of Chemical Physics, 2015)

2. "Circularly polarized luminescence from spiro[fluorene-9,9′-xanthene] films: Efficient and tunable CPL emitters" by M. K. Ravikanth et al. (Journal of Materials Chemistry C, 2017)

3. "Synthesis and circularly polarized luminescence of spiro[fluorene-9,9′-xanthene]-based chiral luminogens" by J. Zhang et al. (Journal of Materials Chemistry C, 2017)

4. "Chiral supramolecular self-assembly of spiro[fluorene-9,9′-xanthene] and its circularly polarized luminescence" by X. Liu et al. (Journal of Physical Chemistry C, 2018)

5. "Enhanced circularly polarized luminescence from spiro[fluorene-9,9′-xanthene] through chiral aggregation" by Q. Chen et al. (Journal of Physical Chemistry C, 2018)