Recently, the State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences and Soochow University have made progress in the research of ultrafast dynamics of organic solar cells. The research team used femtosecond transient absorption technology to study organic solar cells. The active layer material explains the contribution of DIO additives to the improvement of battery efficiency, and the related results are published in "nanomaterials". As a new type of solar cell device, organic solar cells have the characteristics of flexibility, light weight, adjustable color, solution processing, large-area printing preparation, etc., and are currently a hot spot in the field of solar cell research. But low efficiency is the main reason that limits its large-scale application. The research team studied the effect of DIO additives on the photo-generated carrier dynamics in the donor material (P51) and bulk heterojunction film (P51:PC71BM) through pump detection technology. It is found that the introduction of DIO additives can increase the lifetime of the polaron pair in the donor material P51, which is beneficial to the generation of photogenerated carriers. In addition, in bulk heterojunction films (P51: PC71BM), DIO additives can promote ultra-fast charge separation and the production and separation of CT state excitons. The study explained the effect of DIO additives on the efficiency of organic solar cells from the perspective of ultrafast dynamics, and provided a new research method for the next improvement of the efficiency of organic solar cells. Related work has been supported by the National Development and Reform Commission, the Shanghai Development and Reform Commission, the Shanghai-level major project, the Chinese Academy of Sciences Strategic Leading Science and Technology Special (Class B), and the National Natural Science Foundation of China. Polyester Glove,Bamboo Cotton,Cotton Spandex,E-Liquid Accessory QD Cloudy Inernational Pre Ltd , https://www.qdcloudy.com
Schematic diagram of ultrafast dynamics in bulk heterojunction film (P51: PC71BM)