Proceedings of Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP23)
Publication date: 21st November 2022
Because of rapid development of nonfullerene materials, the performance of organic photovoltaics (OPV) have been suppressed 19%. 1 However, there has critical problem about the open circuit voltage(VOC) losing while maximum the light harvesting from the active layer. Optimized bulk-heterojunction (BHJ) and electron or hole transporting layer (ETL or HTL) will been demonstrated as the efficient strategy , which can improve carrier generation, transportation, and extraction of OPV. In this study, an amine-based polymer-jeffamines was introduced and reacted with PC71BM as electrode interfacial layer (IFL) of organic photovoltaic. To investigate the suitability of IFL in OPV, we evaluated the crosslinking reaction with various ratio of jeffamine and PC71BM. The properties of IFLs were analyzed by UV-Vis, Kelvin probe force microscopy (KPFM), ultraviolet photoelectron spectroscopy (UPS), contact angle and tapping mode atomic force microscopy (AFM). It was found that Jeffamine/PC71BM hybrid layer modifying the work function and reduce the defects of ZnO to enhance the carrier transportation and extraction of PM6:L8BO blend active layer, thereby improving the performance of the device. We observed an improvement of power conversion efficient (PCE) from 16.6% to 17.5% (AM 1.5G, 100mW/cm2 ) when compared with the controlled device.
We thank the Ministry of Science and Technology of Taiwan (MOST 110-2221-E-002 -004 -MY2) for financial support
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