The progress of flexible organic solar cells made by Ningbo materials co

Research direction of hot spots in the frontier of technology. Flexible organic solar cells with high efficiency, bending resistance and low cost have strong application potential in flexible wearable and portable electronic devices, photovoltaic architecture integration and military fields. At present, most organic solar cell research results are based on rigid tin oxide (ITO) glass substrate. But if organic solar cells are to be commercialized, their real advantage will be in low-cost wet printing and roll to roll manufacturing. In organic solar cells, indium doped tin oxide (ITO) is the most commonly used electrode material. However, ITO has problems such as poor electrical conductivity and mechanical brittleness on the plastic substrate, and ITO is usually processed by vacuum sputtering at high temperature, which makes it expensive and is not conducive to large-area printing and roll-to-roll preparation. There have been some reports with new electrode materials to replace traditional ITO, such as nano silver wire, graphene, carbon nanotubes, conducting polymers, including poly (3, 4 - thiophene and ethyl 2 oxygen), poly (styrene sulfonate) (PEDOT: PSS) thin film cost is relatively low, and the film showed high optical and electrical properties, excellent thermal stability, good flexibility, etc. The use of acid doped PEDOT:PSS can greatly improve its conductivity, but most of the reported use of strong acids such as sulfuric acid, nitric acid doping, and then high temperature post-treatment, easy to damage PET and other flexible plastic substrate.

Recently, ningbo material technology and engineering research institute, Chinese academy of sciences researcher GeZiYi team in early based on the study of the high efficiency of organic solar cells (NaturePhotonics, 2015,9,520; 2018,30,1703005 AdvancedMaterials,; Macromolecules, 2018, DOI: 10.1021 / acs. Macromol. 8 b00683; JournalofMaterialsChemistryA, 2018,6,464), and made new progress in the field of flexible organic solar cells, the innovative development of the low-temperature acid treatment of PEDOT: PSS electrode to replace need high temperature sputtering and expensive ITO electrode. Low temperature mesylate treatment can improve the conductivity of PEDOT:PSS film, reduce the roughness of the film, and avoid the destruction of flexible plastic substrate by traditional strong acid treatment. Then, the single-junction flexible organic solar cells with non-ito processing by wet method were prepared using the full solution processing technology and the pbdb-t and it-m non-fullerene active layer. The energy conversion efficiency of the cells reached 10.12%, which was the highest efficiency of the flexible organic solar cells processed by the full wet method reported so far. Moreover, this kind of flexible organic solar cell processed in full solution is in line with the technical requirements of large-area preparation processes such as roll-to-roll printing and scraping, which provides an important reference way for low-cost flexible preparation of organic solar cells. The work in AllSolution - ProcessedMetalOxide - FreeFlexibleOrganicSolarCellswithOver10 % Efficiency issues published in international journals (AdvancedMaterials) on the advanced materials. Fan xi, a member of gezi yihetuan, is the co-corresponding author of the paper, and song wei, a postgraduate student, is the first author.

The study obtained the national key research and development program (2017 yfb0401000 yfe0106000 and 2016), the national natural science foundation of China (51773212215414 and 21674123), Chinese academy of sciences frontier science research project (QYZDB - SSW - SYS030), key international cooperation project (174433 kysb20160065) of Chinese academy of sciences, Chinese academy of sciences cross innovation team, beilun district, ningbo city, zhejiang province outstanding youth fund (LR16B040002) and science and technology innovation team (2015 b1100 2,2016 (B10005), etc.

The page contains the contents of the machine translation.