Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 29, Issue 22, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201900484
Keywords
hole-transporting material; linear structure; planar p-i-n perovskite solar cells
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Funding
- National Natural Science Foundation of China [51603021, 51602031, 51673139]
- Top-notch Academic Programs Project of Jiangsu Higher Education Institutions (TAPP)
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Applied Basic Research Programs of Changzhou [CJ20179020]
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For commercial applications, it is a challenge to find suitable and low-cost hole-transporting material (HTM) in perovskite solar cells (PSCs), where high efficiency spiro-OMeTAD and PTAA are expensive. A HTM based on 9,9-dihexyl-9H-fluorene and N,N-di-p-methylthiophenylamine (denoted as FMT) is designed and synthesized. High-yield FMT with a linear structure is synthesized in two steps. The dopant-free FMT-based planar p-i-n perovskite solar cells (pp-PSCs) exhibit a high power conversion efficiency (PCE) of 19.06%, which is among the highest PCEs reported for the pp-PSCs based on organic HTM. For comparison, a PEDOT:PSS HTM-based pp-PSC is fabricated under the same conditions, and its PCE is found to be 13.9%.
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