Ionization of hole-transporting materials as a method for improving the photovoltaic performance of perovskite solar cells
文献情報
Yogesh S. Tingare, Chien-Hsiang Lin, Chaochin Su, Sheng-Chin Chou, Ya-Chun Hsu, Dibyajyoti Ghosh, Ning-Wei Lai, Xin-Rui Lew, Wen-Ren Li
In the operating mechanisms of perovskite solar cells, hole-transporting materials (HTMs) facilitate directional charge transfer and electron blocking. In addition, HTMs are also important in forming the perovskite layers for inverted perovskite solar cells, improving device efficiency. We present a method for increasing efficiency by ionizing HTMs, introducing defect-passivating abilities, improved interfacial properties, and ideal surface topographies. Compared to their non-ionized counterpart, the ionic HTMs have well-matched energy levels and smooth perovskite layers, resulting in higher short-circuit current densities. These experimental findings are corroborated by atomistic first principle electronic structure calculations of model perovskite systems. Furthermore, we conducted a comparative study of different ionizing counter anions for HTMs. The iodide-based ionic HTM, PMO-I, has a maximum efficiency of 20.46%, 1.71% higher than that of the non-ionic HTM, PMO (18.75%).
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Journal of Materials Chemistry A

Journal of Materials Chemistry A, B & C cover high quality studies across all fields of materials chemistry. The journals focus on those theoretical or experimental studies that report new understanding, applications, properties and synthesis of materials. The journals have a strong history of publishing quality reports of interest to interdisciplinary communities and providing an efficient and rigorous service through peer review and publication. The journals are led by an international team of Editors-in-Chief and Associate Editors who are all active researchers in their fields. Journal of Materials Chemistry A, B & C are separated by the intended application of the material studied. Broadly, applications in energy and sustainability are of interest to Journal of Materials Chemistry A, applications in biology and medicine are of interest to Journal of Materials Chemistry B, and applications in optical, magnetic and electronic devices are of interest to Journal of Materials Chemistry C. More than one Journal of Materials Chemistry journal may be suitable for certain fields and researchers are encouraged to submit their paper to the journal that they feel best fits for their particular article. Example topic areas within the scope of Journal of Materials Chemistry A are listed below. This list is neither exhaustive nor exclusive. Artificial photosynthesis Batteries Carbon dioxide conversion Catalysis Fuel cells Gas capture/separation/storage Green/sustainable materials Hydrogen generation Hydrogen storage Photocatalysis Photovoltaics Self-cleaning materials Self-healing materials Sensors Supercapacitors Thermoelectrics Water splitting Water treatment














