研究目的
Investigating the efficiency improvement of perovskite solar cells (PSCs) by solvothermal etching and/or TiCl4 treatment of TiO2 nanorod arrays (NRAs) based electron transport layer (ETL).
研究成果
The study demonstrates that solvothermal etching and TiCl4 treatment of TiO2 NRAs can significantly improve the PCE of PSCs. The best performance was achieved with a PCE of 15.16%, attributed to the reduction of traps and voids in the TiO2 NRs and the enhancement of the effective light absorption area.
研究不足
The fabrication and measurements were performed under high humid and open atmosphere conditions, which may affect the reproducibility and efficiency of the PSCs.
1：Experimental Design and Method Selection:
The study involves the fabrication of PSCs with TiO2 NRAs as the ETL, followed by solvothermal etching and TiCl4 treatment to enhance the PCE.
2：Sample Selection and Data Sources:
FTO-coated glass substrates were used for the growth of TiO2 NRAs.
3：List of Experimental Equipment and Materials:
Equipment includes a digital muffle furnace, spin coater, and semiconductor parameter analyzer. Materials include lead iodide, FTO-coated glass substrate, titanium (IV) chloride, and methylammonium iodide.
4：Experimental Procedures and Operational Workflow:
The process involves the preparation of the ETL, solar cell fabrication, and characterization of the material and device.
5：Data Analysis Methods:
The performance parameters of the PSCs were analyzed using current-voltage (I-V) characteristics and external quantum efficiency (EQE) measurements.
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Digital multimeter
34410A
Agilent
Measurement of output current of the device at different wavelengths
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X-ray diffractometer
MiniFlex
Rigaku
Characterization of the crystalline structure of TiO2 NRs
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Transmission electron microscopy
FEI G2 T20 STWIN
FEI
Analysis of the structure and crystallinity of TiO2 NRs
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High-resolution scanning emission microscopy
Nova Nano SEM 450
FEI
Recording the surface morphology of the sample
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Spectrometer
FLS 980
Edinburgh Instruments
Photoluminescence measurement
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Semiconductor parameter analyzer
B1500A
Keysight
Electrical measurement including current-voltage (I-V) and impedance
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Power meter
PM100D
Thorlabs
Measurement of the power of the incident light
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Energy dispersive spectroscopy
EDAX Inc.
EDAX
Evaluation of the elemental composition of the sample
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Atomic force microscopy
NTEGRA Prima
NT-MDT Service & Logistics Ltd.
Analysis of the roughness of TiO2 and perovskite layers
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UV-Vis spectrophotometer
Jesco, V-750
Jesco
Measurement of transmittance and absorbance spectra
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Solar simulator
PET Corporation
PET Corporation
Providing solar light spectrum of 100 mW/cm2 and 1.5 AM G
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Monochromator
SP2150i
Princeton Instruments
Measurement of external quantum efficiency (EQE)
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