Cadmium sulfide nanocrystal sensitized vertically aligned titanium dioxide rods for large area image sensors on 3-D substrates

Mazumdar, Sayantan ; Nyaypati, Mahidhar ; Sambandan, Sanjiv ; Bhattacharyya, Aninda J. (2015) Cadmium sulfide nanocrystal sensitized vertically aligned titanium dioxide rods for large area image sensors on 3-D substrates ECS Journal of Solid State Science and Technology, 4 (12). Q119-Q123. ISSN 2162-8769

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Official URL: http://jss.ecsdl.org/content/4/12/Q119

Related URL: http://dx.doi.org/10.1149/2.0081512jss

Abstract

We discuss here a semiconductors assembly comprising of titanium dioxide (TiO2) rods sensitized by cadmium sulfide (CdS) nanocrystals for potential applications in large area electronics on three dimensional (3-D) substrates. Vertically aligned TiO2 rods are grown on a substrate using a 150° C process flow and then sensitized with CdS by SILAR method at room temperature. This structure forms an effective photoconductor as the photo-generated electrons are rapidly removed from the CdS via the TiO2 thereby permitting a hole rich CdS. Current-voltage characteristics are measured and models illustrate space charge limited photo-current as the mechanism of charge transport at moderate voltage bias. The stable assembly and high speed are achieved. The frequency response with a loading of 10 pF and 9 MΩ shows a half power frequency of 100 Hz.

Item Type:Article
Source:Copyright of this article belongs to The Electrochemical Society.
Keywords:Assembly; Cadmium Sulfide Nanocrystal; High Speed; Hole Large Area Electronics; Semiconductors; Space Charge Limited Photo-Current; Three Dimensional Substra; Titanium Dioxide Rods
ID Code:109148
Deposited On:22 Dec 2017 10:16
Last Modified:22 Dec 2017 10:16

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