Multifaceted Role of a Dibutylhydroxytoluene Processing Additive in Enhancing the Efficiency and Stability of Planar Perovskite Solar Cells
| Autor: | Sang Il Seok, Changduk Yang, Nam Khen Oh, Junghyun Lee, Hyoung Woo Kwon, Jihyung Seo, Yunseong Choi, So-Huei Kang, Mingyu Jeong, Hyesung Park, Sujit Kumar |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Chemical substance Halide Nanotechnology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Planar General Materials Science 0210 nano-technology Science technology and society Perovskite (structure) |
| Zdroj: | ACS applied materialsinterfaces. 11(42) |
| ISSN: | 1944-8252 |
| Popis: | Significant research efforts are currently being devoted to improving both the crystalline quality and stability of lead halide perovskite absorbers to advance the commercial prospects of perovskite-based solar cells. Herein, we report a simple one-step dibutylhydroxytoluene (BHT) additive-based approach for simultaneously improving the crystallinity and resistance of perovskite films under adverse degradation conditions. We found that BHT, commonly known for its antioxidant properties, can considerably improve the performance of methylammonium lead iodide perovskite solar cells by modulating the chemical environment within the precursor medium to form intermediate complexes, and it can also suppress photooxidation, which results in perovskite degradation under environmental operating conditions. Consequently, a device exhibited a significant power conversion efficiency improvement to 18.1% with the BHT-additive-based perovskite absorber, exceeding the 17.1% efficiency achieved for the control device. The BHT additive also improved the perovskite stability by quenching intermediate reactions resulting in perovskite degradation to an undesirable lead iodide phase, as evidenced by detailed analysis of absorption spectra, grazing-incidence wide-angle X-ray scattering, X-ray photoelectron spectra, and photoluminescence measurements. |
| Databáze: | OpenAIRE |
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