Diffraction behavior of photorefractive molecular materials containing phenothiazine derivatives

Choi, Dong Hoon; Oh, Kwang Yong; Jun, Woong Gi; Kim, Jae Hong; Choi, Suk-Ho
December 2002
Applied Physics Letters;12/16/2002, Vol. 81 Issue 25, p4727
Academic Journal
We report the diffraction behavior of the photorefractive (PR) molecular materials that contain the phenothiazine derivatives. Diphenylhydrazine and malononitrile were reacted with N-alkyl substituted phenothiazinyl aldehyde to provide charge transporting and nonlinear optical (NLO) molecules, respectively. In the molecular materials prepared with phenothiazine derivatives, we observed very unusual complementary gratings formed by the space charge fields of two types of photocarriers, which can be explained based on a bipolar two-trap PR model. Adding the specific molecules to the host PR materials increased the trapped hole density during grating formation and erasing processes.


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