研究目的
Investigating the effects of an ultrathin CaTiO3 layer on the photovoltaic performance and stability of perovskite solar cells.
研究成果
The introduction of an ultrathin CaTiO3 layer between the mp-TiO2 and perovskite layers significantly improves the photovoltaic performance and stability of perovskite solar cells. The modification facilitates electron transport, suppresses charge recombination, and optimizes energy level alignment, leading to a maximum PCE of 19.12% and maintaining 85% of the initial efficiency after 1000 hours of ambient exposure.
研究不足
The study does not address the long-term stability under operational conditions beyond 1000 hours or the scalability of the fabrication process for industrial applications.
1：Experimental Design and Method Selection:
The study involved the fabrication of an ultrathin CaTiO3 layer on mp-TiO2 to modify the perovskite/mp-TiO2 interface in PSCs. The modification aimed to facilitate electron transport and suppress charge recombination.
2：Sample Selection and Data Sources:
The samples included perovskite solar cells with and without the CaTiO3 modification layer. Data were collected from UV–vis absorbance measurements, SEM images, XRD patterns, XPS spectra, and photovoltaic performance tests.
3：List of Experimental Equipment and Materials:
TiO2 paste, lead iodide (PbI2), lead bromide (PbBr2), cesium iodide (CsI), formamidinium iodide (FAI), methylammonium bromide (MABr), Spiro-OMeTAD, and calcium nitrate (Ca(NO3)2) were used. Equipment included a spin coater, X-ray diffractometer, UV–vis spectrophotometer, field-emission scanning electron microscope, and digital source meter.
4：Experimental Procedures and Operational Workflow:
The mp-TiO2 layer was modified with CaTiO3 by spin coating a solution of calcium nitrate on mp-TiO2 film, followed by annealing. Perovskite precursor solution was then spin-coated on the modified and non-modified samples, and the photovoltaic performance was evaluated.
5：Data Analysis Methods:
The performance of the PSCs was analyzed based on J-V curves, IPCE spectra, steady-state efficiencies, PL and TRPL spectra, and EIS measurements.
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-
TiO2 paste
18NR-T
Dyesol
Used as a mesoporous TiO2 layer in the fabrication of perovskite solar cells.
-
Lead iodide
Xi’an Polymer Light Technology Corp
Used in the preparation of perovskite precursor solution.
-
Lead bromide
Xi’an Polymer Light Technology Corp
Used in the preparation of perovskite precursor solution.
-
Cesium iodide
Xi’an Polymer Light Technology Corp
Used in the preparation of perovskite precursor solution.
-
Formamidinium iodide
Xi’an Polymer Light Technology Corp
Used in the preparation of perovskite precursor solution.
-
Methylammonium bromide
Xi’an Polymer Light Technology Corp
Used in the preparation of perovskite precursor solution.
-
Spiro-OMeTAD
Xi’an Polymer Light Technology Corp
Used as a hole transport material in perovskite solar cells.
-
Calcium nitrate
Alfa Aesar or Sigma-Aldrich
Used to fabricate the CaTiO3 modification layer on mp-TiO2.
-
登录查看剩余6件设备及参数对照表
查看全部
