Multiple-Function Surface Engineering of SnO2 Nanoparticles to Achieve Efficient Perovskite Solar Cells
Copyright policy )Multiple-Function Surface Engineering of SnO2 Nanoparticles to Achieve Efficient Perovskite Solar Cells
The mismatched energy-level alignment and interface defects of the SnO2 nanoparticles' electron transport layer (ETL) and perovskite layer worsen the efficiency of the perovskite solar cell. Herein, we devise a multiple-function surface engineering of SnO2 nanoparticles. TBA+ ions improve the dispersion and stability of colloidal T-SnO2 nanoparticles and act as a bridge between the ETL and perovskite layer through the electrostatic interaction with anions, thus suppressing the charge recombination and reducing the energy loss. I- ions passivate oxygen vacancies of SnO2 nanoparticles but also halide vacancies of the perovskite layer. Furthermore, the conduction band edge of T-SnO2 is enhanced to match the energy alignment with the perovskite, which reduces the energy offset for electron transfer. As a result, the champion solar cell based on T-SnO2 presented a power conversion efficiency of 21.71% with a VOC of 1.15 V and negligible hysteresis, which are much higher than those of the reference device.
- Beijing University of Technology China (People's Republic of)
- Beijing University of Technology China (People's Republic of)
Chemical Sciences not elsewhere classified, Physiology, reference device, energy loss, Biochemistry, interface defects, also halide vacancies, Space Science, conduction band edge, ions improve, much higher, charge recombination, level alignment, negligible hysteresis, Ecology, thus suppressing, >< sub, mismatched energy, Cell Biology, 15 v, energy offset, perovskite solar cell, electron transfer, v </, power conversion efficiency, 620, function surface engineering, oc </ sub, sup >–</ sup, electrostatic interaction, 2 </ sub, energy alignment, Medicine, sup >+</ sup, perovskite layer worsen, perovskite layer, Biotechnology
Chemical Sciences not elsewhere classified, Physiology, reference device, energy loss, Biochemistry, interface defects, also halide vacancies, Space Science, conduction band edge, ions improve, much higher, charge recombination, level alignment, negligible hysteresis, Ecology, thus suppressing, >< sub, mismatched energy, Cell Biology, 15 v, energy offset, perovskite solar cell, electron transfer, v </, power conversion efficiency, 620, function surface engineering, oc </ sub, sup >–</ sup, electrostatic interaction, 2 </ sub, energy alignment, Medicine, sup >+</ sup, perovskite layer worsen, perovskite layer, Biotechnology
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