New Insight into the Lewis Basic Sites in Metal–Organic Framework-Doped Hole Transport Materials for Efficient and Stable Perovskite Solar Cells,ACS Applied Materials & Interfaces

当前位置： X-MOL 学术 › ACS Appl. Mater. Interfaces › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

New Insight into the Lewis Basic Sites in Metal–Organic Framework-Doped Hole Transport Materials for Efficient and Stable Perovskite Solar Cells
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-01-20 , DOI: 10.1021/acsami.0c19968
Jiaqi Wang ₁ , Jian Zhang ₁ , Yulin Yang ₁ , Shuang Gai ₁ , Yayu Dong ₁ , Lele Qiu ₁ , Debin Xia ₁ , Xiao Fan ₁ , Wei Wang ₁ , Boyuan Hu ₁ , Wei Cao ₁ , Ruiqing Fan ₁

Affiliation

Currently, Spiro-OMeTAD is the most widely used hole transport material (HTM) in the best-performing perovskite solar cells (PSCs), resulting from its suitable energy level and facile processing. However, the intrinsic properties of organic molecules, such as low conductivity and a nonpolar contact interface, will limit the power conversion efficiency (PCE) and stability of Spiro-OMeTAD-based PSCs. Chemical doping could be an effective strategy to ameliorate the performance of Spiro-OMeTAD, and most of the dopants are designed for controllably oxidizing Spiro-OMeTAD. In this work, a highly stable metal–organic framework {[Zn(Hcbob)]·(solvent)}_n (Zn-CBOB) with rod topology and Lewis basic sites is assembled and employed as a dopant for the hole transport layer. It is found that Zn-CBOB not only controllably oxidizes Spiro-OMeTAD and improves the conductivity of the HTM but also passivates the surface traps of the perovskite film by coordinating with Pb²⁺. The Zn-CBOB-doped PSCs achieved a remarkable PCE of 20.64%. In addition, the hydrophobicity of Zn-CBOB can prevent water from destroying the perovskite layer, which helps elevate the stability of PSCs.

中文翻译：

高效稳定的钙钛矿太阳能电池用金属有机骨架掺杂的空穴传输材料中的Lewis基本位点的新见解

目前，Spiro-OMeTAD是钙钛矿型太阳能电池（PSC）中性能最优异的空穴传输材料（HTM），这归因于其合适的能量水平和便捷的加工工艺。但是，有机分子的固有属性（例如低电导率和非极性接触界面）将限制基于Spiro-OMeTAD的PSC的功率转换效率（PCE）和稳定性。化学掺杂可能是改善Spiro-OMeTAD性能的有效策略，并且大多数掺杂剂设计用于可控地氧化Spiro-OMeTAD。在这项工作中，一个高度稳定的金属有机骨架{[Zn（Hcbob）]·（溶剂）} _n组装了具有杆形拓扑和Lewis基本位点的（Zn-CBOB），并用作空穴传输层的掺杂剂。发现Zn-CBOB不仅可控制地氧化Spiro-OMeTAD并提高HTM的电导率，而且通过与Pb ²⁺配位钝化钙钛矿膜的表面陷阱。Zn-CBOB掺杂的PSC达到了20.64％的出色PCE。另外，Zn-CBOB的疏水性可以防止水破坏钙钛矿层，这有助于提高PSC的稳定性。

更新日期：2021-02-03

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11