Chandrasekaran Dharuman, Chiu Yu-Lin, Yu Chun-Kai, Yen Yung-Sheng, Chang Yuan-Jay
Department of Chemistry, Chung Yuan Christian University, 320, Zhongli, Taoyuan, Taiwan.
Department of Chemistry, Tunghai University, 407, Xitun, Taichung, Taiwan.
Chem Asian J. 2021 Nov 15;16(22):3719-3728. doi: 10.1002/asia.202100985. Epub 2021 Oct 7.
In this paper, two D-π-D type compounds, C1 and C2, containing dihydrodinaphthopentacene (DHDNP) as a π-bridge, p-methoxydiphenylamine and p-methoxytriphenylamine groups as the donor groups were synthesized. The four 4-hexylphenyl groups at the sp -carbon bridges of DHDNP were acquainted with control morphology and improving solubility. The light absorption, energy level, thermal properties, and application as hole-transporting materials in perovskite solar cells of these compounds were fully investigated. The HOMO/LUMO levels and energy gaps of these DHDNP-based molecules are suitable for use as hole-transporting materials in PSCs. The best power conversion efficiencies of the PVSCs based on the C1 and C2 are 15.96% and 12.86%, respectively. The performance of C1 is comparable to that of the reference compound spiro-OMeTAD (16.38%). Compared with spiro-OMeTAD, the C1-based PVSC device showed good stability, which was slightly decreased to 98.68% of its initial efficiency after 48 h and retained 81% of its original PCE after 334 h without encapsulation. These results reveal the potential usefulness of the DHDNP building block for further development of economical and highly efficient HTMs for PVSCs.
在本文中，合成了两种含二氢二萘并戊省（DHDNP）作为π桥、对甲氧基二苯胺和对甲氧基三苯胺基团作为供体基团的D-π-D型化合物C1和C2。DHDNP的sp -碳桥上的四个4-己基苯基用于控制形貌和提高溶解性。对这些化合物的光吸收、能级、热性能以及在钙钛矿太阳能电池中作为空穴传输材料的应用进行了全面研究。这些基于DHDNP的分子的最高占据分子轨道/最低未占据分子轨道能级和能隙适合用作PSC中的空穴传输材料。基于C1和C2的光伏太阳能电池的最佳功率转换效率分别为15.96%和12.86%。C1的性能与参考化合物螺环-OMeTAD（16.38%）相当。与螺环-OMeTAD相比，基于C1的PVSC器件表现出良好的稳定性，在48小时后其初始效率略有下降至98.68%，在未封装的情况下334小时后仍保留其原始光电转换效率的81%。这些结果揭示了DHDNP结构单元在进一步开发用于PVSC的经济高效空穴传输材料方面的潜在用途。
