NOVELTY - Aqueous dye dispersion comprises: a water insoluble dye; an alkalizing agent; a surfactant; and water, where the water insoluble dye comprises at least one acid group, and the aqueous dye dispersion is substantially free of volatile organic solvents, co-solvents and diluents.    USE - The aqueous dye dispersion is useful for making: organic dye layer, which is useful in dye sensitized solar cell, imaging device and an information storage device; and a dye sensitized electronic device (all claimed) such as sensing devices.    ADVANTAGE - The aqueous dye dispersion is: substantially free of volatile organic solvents, co-solvents and diluents (claimed); and cost-effective.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:    (1) a dye sensitized solar cell comprising (a) a substrate, (b) a conductor or semiconductor disposed on the substrate, (c) a mesoporous metal oxide layer disposed on the conductor or semiconductor, (d) an organic dye layer disposed on the mesoporous metal oxide layer (where the organic dye layer is made from the aqueous dye dispersion), (e) a charge transport layer in contact with the organic dye layer (where the charge transport layer comprises a redox couple comprising triiodide/iodide, cobalt(III)/cobalt(II), ferric/ferrous, cupric/cuprous, silver(I) ion/silver and/or ferrocenium/ferrocene), and (f) a second conductor in electrical contact with the charge transport layer;    (2) an imaging device comprising an array of individually addressable cells, where each cell comprises (a1) a first substrate, (b1) a conductor or semiconductor disposed on the first substrate, the components (c)-(f) as above per se, where the second conductor is transparent, (g1) a second substrate i.e. transparent, and (h) a color filter i.e. selected to be transparent at the wavelength of interest;    (3) an information storage device comprising an array of individually addressable cells, where each cell comprises the components (a1), (b1), (c)-(f) and (g1) as above per se, and (h2) a capacitor electrically connected to the first conductor or alternatively the second conductor; and    (4) making the dye sensitized electronic device, comprising providing the aqueous dye dispersion, providing a composite comprising a metal oxide layer, and forming a coating on the metal oxide layer from the aqueous dye dispersion so that a dye sensitized metal oxide is formed.