研究目的
Investigating the effect of polymer regioregularity on the thermal stability of polymer solar cells (PSCs) and understanding the mechanism behind the improved thermal stability due to the mutual interaction between polymer crystallites and fullerene aggregation.
研究成果
The thermal stability of PSCs can be significantly improved by using polymers with high regioregularity, which enhances the mutual interaction between polymer crystallites and fullerene aggregation. The study provides a mechanistic understanding of how multi-length-scale PCBM aggregation affects the thermal stability of PSCs, offering insights into the manipulation of film structure for enhanced device performance.
研究不足
The study focuses on P3HT-based PSCs and the effect of polymer regioregularity on thermal stability, which may not be directly applicable to other polymer systems. The experimental conditions, such as thermal annealing temperature and time, are specific and may not cover all possible operational conditions of PSCs.
1：Experimental Design and Method Selection:
The study utilized grazing-incidence small- and wide-angle X-ray scattering (GISAXS and GIWAXS) to investigate the hierarchical BHJ morphology of PSCs.
2：Sample Selection and Data Sources:
P3HT polymers with different regioregularities (
3：7% and 7%) were blended with PCBM to prepare the active layer solution. List of Experimental Equipment and Materials:
Instruments included a spectrophotometer (Jasco V-670), photoluminescence spectrometer (Jobin Yvon Fluorolog-Tau-3), and GISAXS/GIWAXS measurements at beam-line 23A station of National Synchrotron Radiation Research Center in Taiwan.
4：Experimental Procedures and Operational Workflow:
The active layer solution was spin-cast on Si substrates, and thermal annealing was performed at 150°C for various time intervals before characterization.
5：Data Analysis Methods:
The GISAXS profiles were analyzed using the Debye-Anderson-Brumberger (DAB) model to determine the characteristic length of the PCBM/P3HT amorphous domain.
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