A green-absorbing dendrimer-based photodetector for image sensing applications

The synthesis and photosensing ability of a novel green-absorbing dendrimer are presented. The photoresponse of a photodiode comprising a bulk heterojunction blend of a first generation ketocyanine-cored dendrimer with carbazole dendrons and fluorenyl surface groups and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) shows good spectral selectivity for digital camera applications. The narrow absorbing photodiode achieved an external quantum efficiency of 2.9% at 515 nm and maintained a profile similar to the absorption of the unblended dendrimer.

[1]  Ruth E. Harding,et al.  A rapid route to carbazole containing dendrons and phosphorescent dendrimers , 2008 .

[2]  Tobin J. Marks,et al.  Efficient squaraine-based solution processable bulk-heterojunction solar cells. , 2008, Journal of the American Chemical Society.

[3]  Rainer F. Mahrt,et al.  Efficient two layer leds on a polymer blend basis , 1995 .

[4]  Konstantin P. Gritsenko,et al.  Vacuum-deposited dye films and their optical properties , 1998, Other Conferences.

[5]  Xiong Gong,et al.  Ultrasensitive solution processed polymer photodetectors , 2009, Organic Photonics + Electronics.

[6]  Steve Collins,et al.  Determining the absorption tolerance of single chromophore photodiodes for machine vision , 2010 .

[7]  Sivalogeswaran Ratnasingam,et al.  Study of the photodetector characteristics of a camera for color constancy in natural scenes. , 2010, Journal of the Optical Society of America. A, Optics, image science, and vision.

[8]  V. Mihailetchi,et al.  Photocurrent generation in polymer-fullerene bulk heterojunctions. , 2004, Physical review letters.

[9]  E. van Veenendaal,et al.  Solution-processed ambipolar organic field-effect transistors and inverters , 2003, Nature materials.

[10]  E. Namdas,et al.  The synthesis and properties of iridium cored dendrimers with carbazole dendrons , 2006 .

[11]  Shih-Chun Lo,et al.  Development of dendrimers: macromolecules for use in organic light-emitting diodes and solar cells. , 2007, Chemical reviews.

[12]  M. Reddington.  Synthesis and properties of phosphonic acid containing cyanine and squaraine dyes for use as fluorescent labels. , 2007, Bioconjugate chemistry.