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High-Performance and Hysteresis-Free Perovskite Solar Cells Based on Rare-Earth-Doped SnO2 Mesoporous Scaffold
- Source :
- Research, Vol 2019 (2019)
- Publication Year :
- 2019
- Publisher :
- American Association for the Advancement of Science, 2019.
-
Abstract
- Tin oxide (SnO 2 ), as electron transport material to substitute titanium oxide (TiO 2 ) in perovskite solar cells (PSCs), has aroused wide interests. However, the performance of the PSCs based on SnO 2 is still hard to compete with the TiO 2 -based devices. Herein, a novel strategy is designed to enhance the photovoltaic performance and long-term stability of PSCs by integrating rare-earth ions Ln 3+ (Sc 3+ , Y 3+ , La 3+ ) with SnO 2 nanospheres as mesoporous scaffold. The doping of Ln promotes the formation of dense and large-sized perovskite crystals, which facilitate interfacial contact of electron transport layer/perovskite layer and improve charge transport dynamics. Ln dopant optimizes the energy level of perovskite layer, reduces the charge transport resistance, and mitigates the trap state density. As a result, the optimized mesoporous PSC achieves a champion power conversion efficiency (PCE) of 20.63% without hysteresis, while the undoped PSC obtains an efficiency of 19.01%. The investigation demonstrates that the rare-earth doping is low-cost and effective method to improve the photovoltaic performance of SnO 2 -based PSCs.
- Subjects :
- Multidisciplinary
Materials science
Dopant
business.industry
Science
Doping
Energy conversion efficiency
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
Tin oxide
01 natural sciences
0104 chemical sciences
Titanium oxide
Hysteresis
Optoelectronics
0210 nano-technology
business
Mesoporous material
Perovskite (structure)
Subjects
Details
- Language :
- English
- ISSN :
- 26395274
- Volume :
- 2019
- Database :
- OpenAIRE
- Journal :
- Research
- Accession number :
- edsair.doi.dedup.....483f46a179a6b5830ef5d26c05d5186f