Cadmium Sulfide Nanocrystal Sensitized Vertically Aligned Titanium Dioxide Rods for Large Area Image Sensors on 3-D Substrates

Mazumdar, Sayantan and Nyaypati, Mahidhar and Sambandan, Sanjiv and Bhattacharyya, Aninda J (2015) Cadmium Sulfide Nanocrystal Sensitized Vertically Aligned Titanium Dioxide Rods for Large Area Image Sensors on 3-D Substrates. In: ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY, 4 (12). Q119-Q123.

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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 degrees 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 M Omega shows a half power frequency of 100 Hz. (C) 2015 The Electrochemical Society. All rights reserved.

Item Type:	Journal Article
Publication:	ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
Publisher:	ELECTROCHEMICAL SOC INC
Additional Information:	Copy right for this article belongs to the ELECTROCHEMICAL SOC INC, 65 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	15 Dec 2015 07:47
Last Modified:	15 Dec 2015 07:47
URI:	http://eprints.iisc.ac.in/id/eprint/52919

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