Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 29, Issue 30, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201900557
Keywords
electron transfer layers; flexible electronics; low-temperature SnO2; perovskite solar cells
Categories
Funding
- NSFC-Guangdong Joint Fund [U1801256]
- National Key R&D Program of China [2016YFA0201002]
- NSFC [51803064, 51571094, 51431006, 51561135014]
- Guangdong Provincial Foundation [2016KQNCX035]
- Program for Chang Jiang Scholars and Innovative Research Teams in Universities [IRT_17R40]
- Guangdong Innovative Research Team Program [2013C102]
- Guangdong Provincial Engineering Technology Research Center for Transparent Conductive Materials
- National Center for International Research on Green Optoelectronics (IrGO)
- MOE International Laboratory for Optical Information Technologies
- 111 Project
- SCNU University Foundation [16KJ06]
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A high-quality polycrystalline SnO2 electron-transfer layer is synthesized through an in situ, low-temperature, and unique butanol-water solvent assisted process. By choosing a mixture of butanol and water as a solvent, the crystallinity is enhanced and the crystallization temperature is lowered to 130 degrees C, making the process fully compatible with flexible plastic substrates. The best solar cells fabricated using these layers achieve an efficiency of 20.52% (average 19.02%) which is among the best in the class of planar n-i-p-type perovskite (MAPbI(3)) solar cells. The strongly reduced crystallization temperature of the materials allows their use on a flexible substrate, with a resulting device efficiency of 18%.
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