前已报道氯取代基对苯并咪唑碳菁染料增感效果的影响,本文用光电导方法进一步研究这些染料的光谱增感机理。 按照电子转移理论,光谱增感的过程,是染料受光激发后所产生的电子转移到AgX导带上然后被AgX中的电子陷阱捕获的过程。West等人的工作,证实了光电流和增感效果有密切关系。Gerisher,Honda等做了大量工作,研究染料在AgCl晶体上的光电流。我 The effects of chlorine substituents on the sensitization of benzimidazole carbocyanine have been reported previously. In this paper, the photoconductive methods were used to further investigate the mechanism of spectral sensitization of these dyes. According to the theory of electron transfer, the process of spectral sensitization is the process by which electrons generated after a dye is excited by light are transferred to the AgX conduction band and then trapped by an electron trap in AgX. The work of West et al. Confirmed that photocurrent and sensitization are closely related. Gerisher, Honda, etc. have done a great deal of work to study the photocurrent of dyes on AgCl crystals. I