研究目的
Investigating the application of a quinonoid zwitterionic molecule (ZW-Bu) as a cathode interlayer in inverted polymer solar cells (PSCs) to improve device performance and demonstrate its initial thickness-insensitive and self-organizing properties.
研究成果
The study successfully demonstrated that solvent orthogonality is not strictly required for efficient and reliable interfacial layers in inverted PSCs. ZW-Bu, as an amphiphilic quinonoid zwitterionic small molecule, showed excellent initial thickness-insensitive and self-organizing properties, making it a promising candidate for high-performance PSCs.
研究不足
The study demonstrates the potential of ZW-Bu as a CBL in inverted PSCs, but the performance of PTB7-Th:PC71BM based devices via self-organization method was inferior to those fabricated via layer-by-layer deposition method, indicating incomplete vertical migration of ZW-Bu molecules.
1：Experimental Design and Method Selection:
The study involved the synthesis of ZW-Bu and its application as a cathode buffer layer (CBL) in inverted PSCs. The performance of PSCs with ZW-Bu CBL was compared with those using ZnO CBL and without any CBL.
2：Sample Selection and Data Sources:
Three different photoactive systems (P3HT:PC61BM, PTB7-Th:PC71BM, and PTB7-Th:ITIC) were used to evaluate the universality of ZW-Bu as a CBL.
3：List of Experimental Equipment and Materials:
Instruments included ultraviolet photoelectron spectroscopy (UPS), X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), and grazing incidence wide-angle X-ray scattering (GIWAXS). Materials included ZW-Bu, ZnO, and various donor:acceptor blends.
4：Experimental Procedures and Operational Workflow:
ZW-Bu was synthesized and characterized. PSCs were fabricated with and without ZW-Bu CBL, and their performance was evaluated under various conditions.
5：Data Analysis Methods:
The performance parameters of PSCs (Jsc, Voc, FF, PCE) were analyzed. The effect of ZW-Bu thickness on device performance was investigated.
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