Organic solar cell research progress

On March 30th, tianjin central leading conducted the MSA based training courses, the training we are very honored to invite the engineer Duan Fangfang teacher quality continuous improvement, in the process of training, period of teachers by adopting the combination of theory field teaching way, morning doing theoretical study, the students in the afternoon by vernier calipers measure the son go to simulate the actual operation process, and to generate data for sharing, relaxed and active classroom atmosphere, students participation is extremely high.

organic solar cells has the advantages of qualitative light, flexible, can be the solution processing, is a hot research direction of the current solar cell technology. With the rapid development of new type of fullerenes receptor material, the energy conversion efficiency of organic solar cell, stepping up recently has exceeded 16%, reached to the practical application development stage.

but, realize the commercial application of organic solar cells, photovoltaic material cost and the stability of the device is also facing challenges. Currently reported from the most efficient photovoltaic materials exist with complicated structure, various synthetic steps, low yield, it is difficult to meet the needs of business applications on cost. So to develop low cost efficient organic photovoltaic materials, polymer solar cells to the application research on key issues.

in view of this, in the national natural science foundation and the support of the pilot program of the Chinese Academy of Sciences, Chinese Academy of Sciences institute of chemistry laboratory of organic solids li team last year designed and synthesized a kind of low cost and efficient donor PTQ10 photovoltaic materials, to the body, the narrow band gap for PTQ10 n - Organic semiconductor ( n - OS) IDIC receptors for the energy conversion efficiency of organic solar cells has reached the 12. 7% ( Nature Commun. , 2018. 9, 743. , the first author is doctoral Sun Chenkai) 。

however, n - IDIC OS receptors exist the central fused ring synthetic steps, the problem of low yield. To reduce IDIC synthetic receptors material cost, they developed a condensed simplify the synthesis methods of IDIC center, at the same time, by introducing oxygen alkyl substituents to further improve the yield of the center of the condensed, and synthesis of the two new n - low cost OS receptor molecules MO - IDIC and MO IDIC - 2F（ Synthetic route) 。 The two receptor molecules with narrow band gap, and the advantages of wide absorption and high electron mobility. The MO - among them IDIC - 2 f and low-cost polymer to PTQ10 blending preparation efficiency of organic solar cells reached 13. 46%. They reported the efficient materials for the active layer material cost accounting, found that based on PTQ10: MO - IDIC - 2 f the cost-effective solar cells in both the cost of materials and components on has prominent advantages ( See figure 2) 。

the above results showed that the MO - IDIC - 2 f is a low-cost receptor materials have potential applications. Related research results published in nature Communications ( Nat。 Commun. 2019,10,519, the first author is doctoral Li Xiaojun) 。