研究目的
Developing cost-effective and rational hole transporting materials for high-performance perovskite solar cells (PSCs) and promoting their commercial endeavor.
研究成果
The 2,6PyDANCBZ shows higher mobility and conductivity along with uniform film-forming ability as compared to 3,5PyDANCBZ. The PSCs fabricated with 2,6PyDANCBZ supersede the performance delivered by Spiro-OMeTAD, and importantly also gave improved long-term stability. The findings put forward small molecules based on core-arm linking topology for cost-effective hole selective layers designing.
研究不足
The study focuses on the comparison between 2,6PyDANCBZ and 3,5PyDANCBZ, and Spiro-OMeTAD, but does not explore other potential hole transport materials. The long-term stability test was conducted under specific conditions (40-50% relative humidity, room temperature), which may not represent all possible environmental conditions.
1：Experimental Design and Method Selection:
Designed and developed pyridine bridging diphenylamine-substituted carbazole small molecules, named as 2,6PyDANCBZ and 3,5PyDANCBZ. Investigated the linking topology of core and arm on their photophysical, thermal, semiconducting and photovoltaic properties systematically.
2：Sample Selection and Data Sources:
Used 2,6PyDANCBZ and 3,5PyDANCBZ as samples.
3：List of Experimental Equipment and Materials:
Employed differential scanning calorimetry (DSC) for thermal stability evaluation, cyclic voltammetry for EHOMO evaluation, and SEM for film-forming abilities investigation.
4：Experimental Procedures and Operational Workflow:
Fabricated planar devices with an architect of ITO/SnO2/perovskite/HTM/Au, introducing 2,6PyDANCBZ, 3,5PyDANCBZ and Spiro-OMeTAD as HTMs.
5：Data Analysis Methods:
Used Mott-Gurney law for hole mobility calculation, and electrical impedance spectroscopy (EIS) for charge transport mechanisms analysis.
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