研究目的
To investigate the effects of ultraviolet-ozone modification on the efficiency and stability of low-temperature planar perovskite solar cells.
研究成果
The ultraviolet-ozone modification on low-temperature TiO2 significantly improves both the efficiency and stability of planar perovskite solar cells. The modified devices exhibit enhanced photovoltaic performance, reduced hysteresis effect, and remarkable stability, maintaining over 90% of their initial efficiency after 40 days of storage in air without encapsulation. This strategy presents a promising approach for the development of low-cost, efficient, and stable perovskite solar cells.
研究不足
The study focuses on the modification of TiO2 surfaces and its impact on perovskite solar cells' efficiency and stability. Limitations may include the scalability of the UV-O3 treatment process and the long-term stability under various environmental conditions beyond the tested parameters.
1：Experimental Design and Method Selection:
The study employs an ultraviolet-ozone assisted strategy to modify the low-temperature TiO2 interface for perovskite solar cells. The methodology includes the synthesis of TiO2 nanoparticles via a nonhydrolytic sol-gel process, fabrication of perovskite solar cells, and characterization of their photovoltaic performance and stability.
2：Sample Selection and Data Sources:
The samples include perovskite solar cells fabricated with pristine and UV-O3 modified TiO2 as electron transport layers. Data sources include photovoltaic performance measurements, ultrafast transient absorption spectroscopy, and transient surface photovoltage measurements.
3：List of Experimental Equipment and Materials:
Equipment includes a transmission electron microscope (TEM), high-resolution TEM (HRTEM), field-emission scanning electron microscope (SEM), X-Ray diffraction (XRD), atomic force microscopy (AFM), scanning Kelvin probe microscopy (SKPM), X-ray photoelectron spectroscopy (XPS), and an electrochemical workstation. Materials include TiO2 nanoparticles, perovskite materials, and Spiro-OMeTAD.
4：Experimental Procedures and Operational Workflow:
The procedure involves the synthesis of TiO2 nanoparticles, fabrication of perovskite solar cells, UV-O3 treatment of TiO2 films, and characterization of the devices' photovoltaic performance and stability.
5：Data Analysis Methods:
Data analysis includes the evaluation of photovoltaic parameters, carrier dynamics through ultrafast transient absorption spectroscopy, and stability assessment through Raman spectroscopy and efficiency decay curves.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容-
X-Ray diffractometer
Empyrean Panalytical X’Pert Pro
Panalytical
To obtain the X-Ray diffraction (XRD) and grazing-incidence XRD patterns.
-
atomic force microscopy
Dimension FastScan
Bruker
To perform AFM under taping mode and scanning Kelvin probe microscopy (SKPM) test.
-
electrochemical workstation
VersaSTAT 3
Ametek
To measure electrochemical impedance spectroscopy (EIS) and Mott-Schottky analysis.
-
transmission electron microscope
JEM-2100
JEOL
To observe the morphology and crystal structure of TiO2 nanoparticles.
-
field-emission scanning electron microscope
HELIOS NanoLab 600i
FEI
To observe the morphologies of TiO2 and perovskite layers.
-
confocal Raman system
inVia
Renishaw
To collect Raman and photoluminescence (PL) spectra under 532 nm laser excitation.
-
X-ray photoelectron spectroscopy
PHI 5400 ESCA System
PHI
To perform XPS tests with a excitation source of Al Kα (1,486.6 eV) X-ray.
-
femtosecond transient absorption spectreometer
HELIOS
Ultrafast System
To perform femtosecond transient absorption (fs-TA) measurement.
-
登录查看剩余6件设备及参数对照表
查看全部
