Acta Phys. -Chim. Sin. ›› 2014, Vol. 30 ›› Issue (3): 397-407.doi: 10.3866/PKU.WHXB201401202

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Heterojunction Interface Modification and Its Effect on the Photovoltaic Performance of Hybrid Solar Cells

PEI Juan, HAO Yan-Zhong, SUN Bao, LI Ying-Pin, FAN Long-Xue, SUN Shuo, WANG Shang-Xin   

  1. College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, P. R. China
  • Received:2013-10-18 Revised:2014-01-14 Published:2014-02-27
  • Contact: HAO Yan-Zhong
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (21173065, 20573031), Natural Science Foundation of Hebei Province, China (B2010000856), Science and Technology Project of Hebei Province, China (13214413), and Doctoral Starting up Foundation (QD201050) and School Fund (XL201255) of Hebei University of Science and Technology, China.


Much attention has been focused on hybrid solar cells because of their low cost and high theoretical efficiencies. The photoactive layer of hybrid solar cells is composed of inorganic semiconductor and organic conjugated polymer. Excitons (electron-hole pairs) are formed upon the absorption of photons by the polymer. The excitons diffuse to the heterojunction interface between the organic donor and inorganic acceptor, and then dissociate to free electrons and holes. These electrons and holes then transfer to the inorganic and organic materials to realize charge separation and transportation. The exciton dissociation efficiency at the organic-inorganic heterojunction interface influences the photovoltaic performance of the cell. A small contact area and poor chemical compatibility between the organic and inorganic materials decrease the exciton dissociation efficiency, and thus the overall cell efficiency. This can be overcome by modifying the heterojunction interface. This paper reviews available interfacial modification methods, their function and significance, and explores prospects for the future development and application of hybrid solar cells.

Key words: Hybrid solar cell, Heterojunction interface, Interfacial modification, Charge separation and transportation, Photovoltaic performance