Vapochromic photodiode

Details Vapochromic photodiode Vapochromic photodiode

1999-05-20

2000-10-24

Chaudhuri, Olik

Active solid-state devices (e.g., transistors, solid-state diode

Organic semiconductor material

257431, H01L 3524

Patent

active

061371181

ABSTRACT:
A sandwich-type, organic p-n junction photodiode is prepared by electrode-position of an insoluble layer of oligomerized tris(4-(2-thienyl)phenyl)amine onto conducting indium-tin oxide coated glass, spin-coating the stacked platinum compound, bis(cyanide)-bis(para-dodecylphenylisocyanide)platinum (II), from chloroform onto the oligomer layer, and then coating the platinum complex with a micro-array of aluminum electrodes by vapor deposition. This device shows rectification of current and gives a measurable photocurrent. The photocurrent action spectrum follows the absorption spectrum of the platinum complex; changes in the action spectrum with layer thickness point to a p-n junction formed at the interface of the molecular layers as the site of rectification. Exposure of the device to acetone vapor causes the action spectrum to shift dramatically to longer wavelength. Exposure to chloroform vapor causes a return to the original spectrum. These results demonstrate a new type of photosensor that reports the arrival of organic vapors.

REFERENCES:
patent: 5629533 (1997-05-01), Ackley et al.
Kunugi et al, "A Vapochromic Photodiode", Chem. Mater., vol. 10, No. 6, pp. 1487-1489, (1998).
C.L. Exstrom et al, "Inclusion of Organic Vapors by Crystalline, Solvatochromic [Pt(aryl isonitrile).sub.4 ][Pd(CN).sub.4 ] Compounds", Chemical Materials, vol. 7, pp. 15-17 (1995).
C.A. Daws et al, "Vapochromic Compounds as Environmental Sensors" Chemical Materials, vol. 9, pp. 363-368 (1997).
R.H. Friend, "Conjugated Polymers and Related Materials", W.R. Salaneck et al, Eds., Chapter 21, Oxford University Press (1993).
Y. Yang, "Polymer Electroluminescent Devices", MRS Bulletin, pp 31-38 (Jun. 1997).
T. Tsutsui, "Progress in Electroluminescent Devices Using Molecular Thin Films", MRS Bulletin, pp. 39-45 (Jun. 1997).
Ghosh et al, "Photovoltaic And Rectification Properties of Al/Mg Phthalocyanine/Ag Schottky-Barrier Cells", Journal of Applied Physics, vol. 45, No. 1, pp. 230-236, Jan. 1974.
Harima et al, "Spectral Sensitization In An Organic p-n Junction Photovoltaic Cell", Appl. Phys. Lett., vol. 45, No. 10, pp. 1144-1145, Nov. 15, 1984.
W.R. Salaneck et al, "Conjugated Polymer Surfaces and Interfaces for Light-Emitting Devices", MRS Bulletin, pp. 46-51 (Jun. 1997).
C.L. Exstrom, "Structural Characterization of Iridium 1,8-Diisocyanomenthane Complexes and the Effects of Guest Molecule Inclusion on the Structure and Spectroscopy of Organometallic Stacking Materials", Ph.D. Dissertation, University of Minnesota, 1995.
Kunugi et al, "A Vapochromic LED", J. A. Chem. Soc., vol. 120, pp. 589-590 (1998).
Yonehara et al, "Dark And Photoconductivity Behavior of C.sub.60 Thin Films Sandwiched With Metal Electrodes", Appl. Phys. Lett., vol. 61, No. 5, pp. 575-576, Aug. 3, 1992.
Yu et al, "Semiconducting Polymer Diodes: Large Size, Low Cost Photodetectors With Excellent Visible-Ultraviolet Sensitivity", Appl. Phys. Lett. vol. 64, No. 25, pp. 3422-3424, Jun. 20, 1994.
Kunugi et al, "Photodiodes Utilizing Polyesters That Contain Different Colored Oligothiophenes In The Main Chain", Chemistry of Materials, vol. 9, No. 5, pp. 1061-1062 May 1997.
Hosokawa et al, "Organic Multi-Color Electroluminescence Display With Fine Pixels", Synthetic Metals, vol. 91, pp 3-7 (1997).

Affiliated with

Also associated with

Rating

Vapochromic photodiode does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Vapochromic photodiode, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vapochromic photodiode will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1966289