| Autor: |
Connell, Arthur, Wnag, Zhiping, Lin, Yen-Hung, Greenwood, Peter C., Wiles, Alan A., Jones, Eurig W., Furnell, Leo, Anthony, Rosie, Kershaw, Christopher P., Cooke, Graeme, Snaith, Henry J., Holliman, Peter J. |
| Jazyk: |
angličtina |
| Rok vydání: |
2019 |
| ISSN: |
2050-7526 |
| Popis: |
Organic hole-transporting materials (HTM) have shown excellent ability in achieving high efficiency perovskite solar cells. However, their high cost significantly limits their applications in scaling-up perovskite solar cells. Here, we report an efficient, low-cost HTM, called TAT-tBuSty, comprising a central triazatruxene moiety with 3 terminal tert-butoxy styrene groups and 3 hexyl side chains on the indole nitrogen. For the first time, we use an inexpensive liquid precur-sor to attach the donor ligand to the molecule. This enables purification of the HTM using a silica plug and recrystallization without the need for complicated column chromatography, which is typically required to purify solid-precursor-prepared HTMs. We estimate that the cost for the purified TAT-tBuSty is $69.90 g-1, which is 35% cheaper than the widely-used 2,2′7,7′-tetrakis-(N,N-di-p-methoxyphenyl-amine)-9,9′-spirobifluorene (spiro-OMeTAD; ca. $112.05 g-1). Using this low-cost TAT-tBuSty as the HTM in a caesium-formamidinium mixed-cation perovskite solar cell, we have successfully achieved a champion power conversion efficiency (PCE) of 20.3% (19.4% stabilized efficiency), which is comparable to the efficiency of devices using the reference spiro-OMeTAD HTM. Our work is crucial for up-scaling of next-generation high-performance metal-halide perovskite solar cells. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
