Photorefractive performance of poly(triarylamine)‐Based polymer composites: An approach from the photoconductive properties

• Published in: Journal of polymer science. Part B, Polymer physics Vol. 53; no. 7; pp. 502 - 508
• Main Authors: Tsutsumi, Naoto, Kinashi, Kenji, Masumura, Kento, Kono, Kenji
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley 01-04-2015; Blackwell Publishing Ltd; Wiley Subscription Services, Inc
• Subjects: charge field; Density; Diffraction; Diffraction efficiency; diphenylamine; Esters; Illumination; light intensity; mixing; NLO; optical diffraction and optical gain; optics; photoconductivity; Photocurrent; Photoelectric effect; Photorefractivity; poly(triarylamine) photorefractive composite; polymers; refractive index; Response time; space
• ISSN: 0887-6266; 1099-0488
• DOI: 10.1002/polb.23663

Photorefractive (PR) and photoconductive properties of methyl‐substituted poly(triarylamine) (PTAA) based PR composite is presented. PR composite consisted of PTAA, piperidinodicyanostyrene, (2,4,6‐trimethylphenyl)diphenylamine, and [6,6]‐phenyl‐C61‐butyric acid methyl ester. Photocurrent is simultaneously measured when a transient degenerate four wave mixing is recorded. Diffraction efficiency of 16.6%, response time of 5 ms, and sensitivity of 43 cm²J⁻¹are measured under an applied field of 45 V μm⁻¹and 632.8 nm illumination with the intensity of 1.5 W cm⁻². Response time of 10.2 ms with diffraction efficiency of 47.0% is obtained under a same field and 532 nm illumination with the intensity of 0.427 W cm⁻². Higher diffraction and faster response is due to the large photocurrent in the order of hundreds μA measured. The resultant trap density is in the order of 10¹⁴cm⁻³. Thus, space–charge field less than 1 V μm⁻¹is evaluated, which limits the PR response. © 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2015, 53, 502–508