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Coadditive Engineering with 5-Ammonium Valeric Acid Iodide for Efficient and Stable Sn Perovskite Solar Cells
- Source :
- ACS Energy Letters. 4:278-284
- Publication Year :
- 2018
- Publisher :
- American Chemical Society (ACS), 2018.
-
Abstract
- Sn-based perovskite solar cells (PSCs) featuring high performance and long-term stability are very challenging because Sn2+ is relatively prone to oxidation. Here, we have performed coadditive engineering with 5-ammonium valeric acid iodide (5-AVAI) for FASnI3-based perovskite films. From the morphological, structural, and elemental analyses, we observed that 5-AVAI affects the crystal growth of perovskites through its hydrogen bond with Iā of the SnI64ā octahedral. As a result, pinhole-free homogeneous and stable Sn-based perovskite films form over a large area with lower Sn4+ content. This made us able to enhance the power conversion efficiency (PCE) for Sn-based PSCs up to 7% in a 0.25 cm2 aperture area. Most importantly, the 5-AVAI added PSCs showed a record stability and maintained their initial PCE under 1 sun continuous illumination at maximum power point tracking for 100 h.
- Subjects :
- chemistry.chemical_classification
Materials science
Valeric acid
Renewable Energy, Sustainability and the Environment
Hydrogen bond
Energy conversion efficiency
Iodide
Energy Engineering and Power Technology
Crystal growth
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
0104 chemical sciences
chemistry.chemical_compound
Fuel Technology
chemistry
Octahedron
Chemical engineering
Chemistry (miscellaneous)
Materials Chemistry
SN2 reaction
0210 nano-technology
Perovskite (structure)
Subjects
Details
- ISSN :
- 23808195
- Volume :
- 4
- Database :
- OpenAIRE
- Journal :
- ACS Energy Letters
- Accession number :
- edsair.doi...........ebbbd223ee3a8bb74814155109d41a46