Chemical Research in Chinese Universities ›› 1990, Vol. 6 ›› Issue (4): 341-345.

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The Photovoltage-gas Sensitive Properties of 7,7,8,8-Tetracyanoquinodimethane(TCNQ)

Jiang Lei, Wang Dejun, Liu Wang, Chai Xiangdong, Li Tiejin   

  1. Department of Chemistry, Jilin University, Changchun
  • Received:1990-08-11 Online:1990-12-24 Published:2011-09-09

Abstract: In this paper, surface photovoltage technique (SPV) was applied to the study of photovoltaic and gas sensitive properties of TCNQpolycrystal. It was found that SPVshows two peaks at 390 nm(P1) and 480 nm (P2) in the ultraviolet-visible range. And they are opposite in phase. The results of gaseous adsorption confirm that P2 shows the acceptor characteristics, while P1 shows that of donor. During adsorption, donor gas interacts with conjugated II* orbital, acceptor gas with the terminal group C=N .

Key words: Surface photovoltage, Gas sensitivity, Adsorption