研究目的
To investigate the effect of lead (II) propionate additive on the stabilization of CsPbI2Br all-inorganic perovskite and the use of a novel dopant-free polymer hole transport material for photovoltaic performance assessment of CsPbI2Br solar cells.
研究成果
The study demonstrated that lead (II) propionate additive significantly improves the environmental stability of CsPbI2Br films and enhances the photovoltaic performance of solar cells. The optimal concentration of the additive (1 mol %) resulted in the highest power conversion efficiency (14.58 %). The synthesized dopant-free polymer HTM showed better performance due to higher hole mobility and better energy level matching with CsPbI2Br.
研究不足
The study was conducted under controlled humidity conditions (20-30 % RH), and the operational stability and shelf-life of the devices under uncontrolled conditions were not tested. The mechanism of defects-passivation by the additive requires further investigation.
1：Experimental Design and Method Selection:
The study involved the use of lead (II) propionate as an additive to stabilize the black phase of CsPbI2Br at a relatively low temperature (180 °C) and under exposure to ambient atmosphere with controlled humidity (20-30 % RH). Solar cells were fabricated with different hole transport materials (HTMs) to assess performance.
2：Sample Selection and Data Sources:
CsPbI2Br films with varying concentrations of lead (II) propionate (0 to 5 mol %) were prepared. The films were characterized using X-ray diffraction (XRD), photoluminescence (PL) measurement, and scanning electron microscopy (SEM).
3：List of Experimental Equipment and Materials:
Instruments used included XRD for crystallinity analysis, PL for luminescence intensity measurement, SEM for surface morphology, and solar simulators for photovoltaic performance assessment.
4：Experimental Procedures and Operational Workflow:
The CsPbI2Br films were prepared by spin-coating mixed precursor solutions. Solar cells were fabricated with the architecture FTO/compact TiO2/meso-TiO2/CsPbI2Br: x % Pb(CH3CH2COO)2/HTM/Au.
5：Data Analysis Methods:
The photovoltaic parameters (Jsc, Voc, FF, PCE) were analyzed from J-V curves. The crystallinity and morphology of the films were analyzed from XRD and SEM data, respectively.
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
