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General Chemistry ›› 2021, Vol. 7 ›› Issue (4): 210009-210009.DOI: 10.21127/yaoyigc20210009

Special Issue: Fuel Cells

• Reviews • Previous Articles     Next Articles

Progress in D−A−D-type Small Molecule Hole-Transport Materials for Perovskite Solar Cells

Yajie Fu,a,c Muhammad Sohail,b Aaqib Khurshid,b and Derong Cao*,a   

  1. aState Key Laboratory of Luminescent Materials and Devices, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong 510641, China
    bDepartment of Chemistry, Faculty of Chemistry, University of Sargodha Sub campus Bhakkar, Bhakkar 30000, Pakistan
    cSchool of Chemical Engineering, Qinghai University, Xining, Qinghai 810016, China
  • Received:2021-07-22 Revised:2021-07-22 Online:2021-12-20 Published:2021-12-31
  • Contact: *Email: drcao@scut.edu.cn (D. C.)

Abstract: As one of the key components of perovskite solar cells (PSCs), hole transport materials (HTMs)  effectively improve the performance and stability of the devices and greatly promote the development of PSCs. At present, due to the advantages of flexible structure design, simple synthesis, low-cost and abundant raw materials, organic small molecule HTMs have been studied extensively by researchers. Among them, small molecule HTMs with donor–acceptor (D–A) type structures for PSCs have received great attention in the last few years because of their high hole mobility due to strong dipolar intermolecular interactions, minimizing ohmic losses of the contact, good stability, and high solubility. In this review, we mainly introduce some representative D−A−D-type small molecule HTMs, summarize and comment on their properties, and discuss the relationship between molecular structure and performance parameters of devices. Finally, based on the current research, the future design of new efficient HTMs is prospected.

Key words: perovskite solar cells, hole transport materials, power conversion efficiency, small molecule,  D?A?D-type

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