Journal
ACS APPLIED ENERGY MATERIALS
Volume 5, Issue 11, Pages 13318-13326Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.2c01909
Keywords
perovskite solar cells; metal-organic frameworks; power conversion efficiency; defect passivation; polynuclear metal cluster
Funding
- National Natural Science Foundation of China
- China Postdoctoral Science Foundation
- Postdoctoral Foundation of Heilongjiang Province
- Natural Science Foundation of Heilongjiang Youth Fund
- [22001050,22072034]
- [21873025]
- [2020T130147]
- [2020M681084]
- [2022M710949]
- [LBH-Z19059]
- [YQ2021B002]
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Polynuclear metal-organic frameworks show satisfactory chemical and thermal stability, making them potential candidates for improving the performance of photoelectric devices. By introducing two polynuclear rare-earth MOFs, the efficiency of perovskite solar cells can be optimized, with enhanced stability.
The polynuclear metal-organic frameworks (MOFs) possess satisfactory chemical and thermal stability and exhibit promising potential as candidates for improving the working performance of photoelectric devices. Herein, two polynuclear rare-earth MOFs, Tb-TZB and Tb-FTZB, (H2TZB = 4-(1H-tetrazol-5-yl) benzoic acid, H2FTZB = 2-fluoro-4-(1H- tetrazol-5-yl) benzoic acid) with a face-centered cubic (fcu) topology are synthesized through the solvothermal method. The highly chemically stable framework and matched energy levels make them ideal additives for the hole transport layer to optimize perovskite solar cells (PSCs). The N and O elements containing lone-pair electrons in the MOF framework interact with uncoordinated Pb2+ and passivate the surface defects of the perovskite film, thus promoting carrier transport in the interface and enhancing the power conversion efficiency (PCE) of the two MOF-modified PSCs. Specifically, the PCE of Tb-FTZB-modified PSCs increases to 21.31% with remarkable repeatability and good stability under long-time storage, indicating the reliability of the fluorine substitution strategy. This work suggests an efficient route to realize high-performance PSCs by employing structurally stable MOF additives.
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