Covalent Organic Framework-Incorporated MAPbI3 for Inverted Perovskite Solar Cells with Enhanced Efficiency and Stability

IF 5.3 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Applied Nano Materials Pub Date : 2024-09-19 DOI:10.1021/acsanm.4c04301

Chen-Wei Wu, Cheng En Cai, Yen-Chung Feng, Zi-Ting Chen, Bo-Tau Liu, Hongta Yang, Shing-Yi Suen, Da-Wei Kuo, Rong-Ho Lee

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Abstract

The study synthesized triazine-based covalent organic framework (COF) materials (TPTP-COF, TPBT-COF, and TPBTz-COF) to be used as defect passivation additives in methylammonium lead iodide (MAPbI₃)-based inverted perovskite solar cells (PVSCs). The frameworks of the COFs in the MAPbI₃ layer can serve as a template for the crystal growth of perovskite, repairing crystal defects, enhancing the quality of the crystal film, and stabilizing perovskite materials. In addition to the conjugation intensity of the COFs, the average particle size of the COF in the precursor solution of the perovskite significantly influences the morphology, optical properties, and photovoltaic characteristics of the COF/MAPbI₃ blend films used in PVCs. The crystal grain size, X-ray diffraction intensity, PL intensity, carrier lifetime, and charge mobility were improved in the MAPbI₃ films when the COF was incorporated, particularly with the TPBTz-COF, compared to the original MAPbI₃ film. The photovoltaic performance and stability of the PVSCs containing the COF were enhanced compared to the PVSCs based on pristine MAPbI₃. The structure of the inverted PVSCs included indium tin oxide/NiO_x/COF (TPTP-COF, TPBT-COF, or TPBTz-COF):MAPbI₃/PC₆₁BM/bathocuproine/Ag. TPBTz-COF exhibited the highest power conversion efficiency (PCE) among the COF additives, achieving a PCE of 20.04%, an open-circuit voltage of 1.04 V, a short-circuit current density of 24.26 mA cm^–1, and a fill factor of 79.40%. The TPBTz-COF-based PVSC maintained 80% of its original power conversion efficiency after being stored for 400 h under ambient conditions (30 °C; 60% relative humidity).

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共价有机框架掺杂 MAPbI3，用于提高效率和稳定性的反相包光体太阳能电池

该研究合成了三嗪基共价有机框架（COF）材料（TPTP-COF、TPBT-COF 和 TPBTz-COF），用作基于甲基碘化铅铵（MAPbI3）的倒置型包晶太阳能电池（PVSC）的缺陷钝化添加剂。MAPbI3 层中的 COF 框架可作为包晶石晶体生长的模板，修复晶体缺陷，提高晶体膜的质量，稳定包晶石材料。除了 COF 的共轭强度外，COF 在透闪石前驱体溶液中的平均粒径也会显著影响用于 PVC 的 COF/MAPbI3 混合薄膜的形貌、光学性能和光伏特性。与原始 MAPbI3 薄膜相比，加入 COF（尤其是 TPBTz-COF）后，MAPbI3 薄膜的晶体粒度、X 射线衍射强度、聚光强度、载流子寿命和电荷迁移率都得到了改善。与基于原始 MAPbI3 的 PVSC 相比，含有 COF 的 PVSC 的光伏性能和稳定性都有所提高。倒置 PVSC 的结构包括氧化铟锡/氧化镍/COF（TPTP-COF、TPBT-COF 或 TPBTz-COF）：MAPbI3/PC61BM/硫辛酸/银。在 COF 添加剂中，TPBTz-COF 的功率转换效率（PCE）最高，达到 20.04%，开路电压为 1.04 V，短路电流密度为 24.26 mA cm-1，填充因子为 79.40%。基于 TPBTz-COF 的 PVSC 在环境条件（30 °C；相对湿度 60%）下存储 400 小时后，其功率转换效率保持在原来的 80%。

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来源期刊

ACS Applied Nano Materials Multiple-

CiteScore

8.30

自引率

3.40%

发文量

1601

期刊介绍： ACS Applied Nano Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics and biology relevant to applications of nanomaterials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important applications of nanomaterials.