4-tert-Butylpyridine Free Hole Transport Materials for Efficient Perovskite Solar Cells: A New Strategy to Enhance the Environmental and Thermal Stability
| Autor: | Udo Bach, Jinbao Zhang, Tian Zhang, Yi-Bing Cheng, Liangcong Jiang |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Energy conversion efficiency Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology Conductivity 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention Organic semiconductor Fuel Technology Chemical engineering chemistry Chemistry (miscellaneous) law Solar cell Materials Chemistry Thermal stability Lithium Thin film 0210 nano-technology Perovskite (structure) |
| Zdroj: | ACS Energy Letters. 3:1677-1682 |
| ISSN: | 2380-8195 |
| Popis: | Organic semiconductors as hole transport materials (HTMs) often require additives, such as LiTFSI and tert-butylpyridine (TBP), in order to enhance their hole conductivities. However, the combination of lithium salts and TBP leads to significant HTM morphological deformation and poor device stability. Here we have successfully applied tetrabutylammonium (TBA) salts to replace both LiTFSI and TBP. A high power conversion efficiency of 18.4% has been achieved for the devices with TBATFSI, which is higher than the control devices with LiTFSI and TBP (18.1%). We also found that the anions in the TBA salts play important roles in the hole conductivity and uniformity of the HTM layer, as well as the hysteresis of the devices. More importantly, the devices with TBATFSI and TBAPF6 demonstrated significantly enhanced environmental and thermal stability. This new strategy of using TBA salts is promising for developing stable organic HTM thin films for solar cell applications. |
| Databáze: | OpenAIRE |
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