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Dopant-Free Hole Transport Materials with a Long Alkyl Chain for Stable Perovskite Solar Cells.
- Source :
-
Nanomaterials (Basel, Switzerland) [Nanomaterials (Basel)] 2019 Jun 28; Vol. 9 (7). Date of Electronic Publication: 2019 Jun 28. - Publication Year :
- 2019
-
Abstract
- Hole transport materials are indispensable to high efficiency perovskite solar cells. Two new hole transporting materials (HTMs), named 4,4'-(9-nonyl-9H-carbazole-3,6-diyl)bis ( N , N -bis(4-methoxyphenyl)aniline) (CZTPA-1) and 4,4'-(9-methyl-9H-carbazole-3,6-diyl)bis ( N , N -bis(4-methoxyphenyl)aniline)(CZTPA-2), were developed by different alkyl substitution methods. The two compounds, containing a carbazole core and triphenylamine (TPA) groups with different lengths of the alkyl chain, were designed and synthesized through a two-step synthesis approach. The power conversion efficiency (PCE) was found to be affected by the length of the alkyl chain, reaching 7% for CZTPA-1 and 11% for CZTPA-2. Furthermore, the CZTPA-2 still maintained 89.7% of its original performance after 400 h. The proposed results demonstrate the effect of carbon chain substituents on the efficiency of perovskite solar cells (PSCs).
Details
- Language :
- English
- ISSN :
- 2079-4991
- Volume :
- 9
- Issue :
- 7
- Database :
- MEDLINE
- Journal :
- Nanomaterials (Basel, Switzerland)
- Publication Type :
- Academic Journal
- Accession number :
- 31261694
- Full Text :
- https://doi.org/10.3390/nano9070935