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TiO2 Nanotubes: An Advanced Electron Transport Material for Enhancing the Efficiency and Stability of Perovskite Solar Cells
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-09-22 , DOI: 10.1021/acs.iecr.0c03415
Ahmed Mourtada Elseman 1, 2 , Ayman H. Zaki 3 , Ahmed Esmail Shalan 2, 4 , Mohamed Mohamed Rashad 2 , Qun Liang Song 1
Affiliation  

Despite the preferential use of titanium dioxide (TiO2) as electron transport layers (ETLs) for perovskite solar cells (PSCs), some problems are still needed to be solved to achieve better power conversion efficiency (PCE). Herein, TiO2 nanotubes (TD-NTs) with network structures have been obtained through an inexpensive hydrothermal strategy. The obtained TD-NTs have been used in constructing PSCs as a favorable interface ETL. The PSC based on TD-NTs displayed a high PCE of 19.14%, increased by 11.4% compared to 17.18% for TiO2 nanoparticles (TD-NPs) as a reference under the same conditions. The benefits beyond the amalgamation of nanotube structures are suppression of charge recombination and reinforcement of the transport pathways for carriers. The stability tests have shown that the cells with the TD-NT network maintain over 90% of their efficiency even after more than 500 h, much better than that of normal nanoparticle-based ones. Overall, TD-NT-ETL has demonstrated its potential in efficient and stable PSCs.

中文翻译:

TiO 2纳米管:用于增强钙钛矿太阳能电池效率和稳定性的先进电子传输材料

尽管优先使用二氧化钛(TiO 2)作为钙钛矿太阳能电池(PSC)的电子传输层(ETL),但仍需要解决一些问题才能获得更好的功率转换效率(PCE)。在此,已经通过廉价的水热策略获得了具有网络结构的TiO 2纳米管(TD-NTs)。所获得的TD-NT已用于构建PSC作为有利的界面ETL。基于TD-NTs的PSC的PCE较高,为19.14%,与TiO 2的17.18%相比,增长了11.4%相同条件下以纳米颗粒(TD-NPs)为参考。纳米管结构合并以外的其他好处是抑制了电荷复合并增强了载流子的传输路径。稳定性测试表明,具有TD-NT网络的电池即使在超过500小时后仍能保持其90%以上的效率,远比基于普通纳米粒子的电池要好。总体而言,TD-NT-ETL展示了其在高效稳定的PSC中的潜力。
更新日期:2020-10-15
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