Institute for Energy Research , Jiangsu University , Zhenjiang 212013 , P. R. China.
School of Chemistry and Chemical Engineering , Jiangsu University , Zhenjiang 212013 , P. R. China.
ACS Appl Mater Interfaces. 2018 Oct 31;10(43):36608-36614. doi: 10.1021/acsami.8b12678. Epub 2018 Oct 17.
Two novel simple-constructed and low-cost hole transport materials (HTMs) POZ9 and POZ10, incorporating a phenoxazine (POZ) core unit, were designed and synthesized for application in perovskite solar cells (PSCs). The typically semblable molecular structure of POZ9 and POZ10 cause them to possess similar energy levels. However, their photovoltaic performances are quite different from each other because of the small variations of N-substitution on POZ ring. The PSCs based on POZ10, which contains three N, N-di-4-methoxyphenylamino units, achieved a power conversion efficiency (PCE) of 19.4%, while the PSC adopting POZ9 as HTM obtained a lower PCE of 17.1%. Moreover, the light intensity dependence research showed that POZ10 has a better hole transporting ability and can efficiently resist the charge recombination.
两种新型的结构简单且成本低廉的空穴传输材料（HTM）POZ9 和 POZ10，均以吩嗪（POZ）为核心单元，被设计并合成以应用于钙钛矿太阳能电池（PSCs）。POZ9 和 POZ10 的典型相似的分子结构导致它们具有相似的能级。然而，由于 POZ 环上 N 取代的微小变化，它们的光伏性能却大不相同。基于含有三个 N，N-二-4-甲氧基苯基氨基单元的 POZ10 的 PSCs，实现了 19.4%的功率转换效率（PCE），而采用 POZ9 作为 HTM 的 PSC 则获得了较低的 17.1%的 PCE。此外，光强依赖性研究表明，POZ10 具有更好的空穴传输能力，可以有效地抑制电荷复合。
