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Low Temperature Solution-Processed Sb:SnO2 Nanocrystals for Efficient Planar Perovskite Solar Cells.
Yang Bai1, Yanjun Fang1, Yehao Deng1
1Department of Mechanical and Materials Engineering, Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, USA.
Chemsuschem
|August 27, 2016
Summary
This study introduces efficient, low-temperature processed inorganic electron-transport layers for perovskite solar cells by doping tin oxide nanocrystals with antimony. This doping enhances conductivity and stability, crucial for flexible and tandem solar cell applications.
Area of Science:
- Materials Science
- Renewable Energy
- Nanotechnology
Background:
- Inorganic metal oxide electron-transport layers (ETLs) offer perovskite solar cells improved stability.
- Conventional ETL fabrication requires high temperatures, limiting applications in flexible and tandem solar cells.
Purpose of the Study:
- To develop efficient inorganic ETLs using a low-temperature solution-processed method.
- To enhance the performance and applicability of perovskite solar cells through improved ETLs.
Main Methods:
- Doping tin oxide (SnO2) nanocrystals (NCs) with a small amount of antimony (Sb).
- Utilizing a low-temperature solution-processed fabrication technique for the doped ETLs.
- Fabricating planar perovskite solar cells with the novel Sb:SnO2 ETLs.
Main Results:
- Sb-doping significantly enhanced the electrical conductivity of SnO2 NCs by increasing carrier concentration.
- Improved energy level alignment and reduced charge recombination were observed due to the Fermi level shift.
- Photovoltaic performance was enhanced, evidenced by increased fill factor and open-circuit voltage (VOC), and reduced photocurrent hysteresis.
Conclusions:
- Low-temperature Sb-doped SnO2 NCs provide an efficient inorganic ETL for perovskite solar cells.
- This method overcomes the high-temperature limitation, enabling applications in flexible and tandem solar cells.
- The enhanced ETL properties contribute to improved device stability and performance.
