Cost-Effective High-Performance Charge-Carrier-Transport-Layer-Free Perovskite Solar Cells Achieved by Suppressing Ion Migration,ACS Energy Letters

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Cost-Effective High-Performance Charge-Carrier-Transport-Layer-Free Perovskite Solar Cells Achieved by Suppressing Ion Migration
ACS Energy Letters ( IF 19.3 ) Pub Date : 2021-08-10 , DOI: 10.1021/acsenergylett.1c01186
Tao Ye ₁ , Yuchen Hou ₁ , Amin Nozariasbmarz ₁ , Dong Yang ₁ , Jungjin Yoon ₁ , Luyao Zheng ₁ , Ke Wang ₂ , Kai Wang ₁ , Seeram Ramakrishna ₃ , Shashank Priya _{1,

2}

Affiliation

Perovskite solar cells (PSCs) without charge-carrier-transport layers (CTLs) are theoretically achievable due to the ambipolar charge-carrier-transfer characteristics presenting in perovskites. However, the power conversion efficiency (PCE) of the CTL-free PSCs needs further improvement. Herein, we provide a breakthrough in the fabrication of the cost-effective high-performance hole-transport-layer (HTL)-free PSC and trilayer PSC with device configurations of fluorine doped tin oxide (FTO)/SnO₂/perovskite/carbon and FTO/perovskite/carbon, respectively. We introduce perfluorotetradecanoic acid (PFTeDA) with a carbonyl unit and carbon fluorine bonds to suppress the ion migration and reduce the crystal defects in perovskites. The modified carbon-based HTL-free PSC shows a record PCE of 18.9%. Furthermore, the PFTeDA molecules are found existing at the grain boundaries between the perovskite crystals, resulting in enhanced environmental, thermal, and light stabilities for the resultant cost-effective high-performance CTL-free PSCs.

中文翻译：

通过抑制离子迁移实现具有成本效益的高性能电荷载体传输层无层钙钛矿太阳能电池

由于钙钛矿中存在的双极性电荷载流子转移特性，理论上可以实现没有电荷载流子传输层 (CTL) 的钙钛矿太阳能电池 (PSC)。然而，无 CTL 的 PSC 的功率转换效率 (PCE) 需要进一步提高。在此，我们在制造具有成本效益的高性能无空穴传输层 (HTL) PSC 和具有氟掺杂氧化锡 (FTO)/SnO ₂器件配置的三层 PSC 方面取得了突破/钙钛矿/碳和FTO/钙钛矿/碳，分别。我们引入了具有羰基单元和碳氟键的全氟十四烷酸 (PFTeDA) 来抑制离子迁移并减少钙钛矿中的晶体缺陷。改性碳基无 HTL PSC 显示出创纪录的 18.9% 的 PCE。此外，发现 PFTeDA 分子存在于钙钛矿晶体之间的晶界处，从而增强了所得具有成本效益的高性能无 CTL PSC 的环境、热和光稳定性。

更新日期：2021-09-10

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