A CdS/CdSeTe with Carbon Nanospheres Sensitized Solar Cell with a Reduced Graphene Oxide Counter Electrode: Fabrication and Characterization

Laha, S (2015) A CdS/CdSeTe with Carbon Nanospheres Sensitized Solar Cell with a Reduced Graphene Oxide Counter Electrode: Fabrication and Characterization. Masters thesis, Indian Institute of Technology Hyderabad.

[img] Text
CY13M1014.pdf - Submitted Version
Restricted to Registered users only until 7 May 2018.

Download (2MB) | Request a copy

Abstract

To make Quantum Dot Sensitized Solar Cells (QDSSCs) competitive, it is necessary to achieve power conversion efficiencies comparable to other solar cell technologies. In this work, a photoactive electrode consisting of CdS (visible light absorbing) and CdSeTe (alloyed quantum dots with an excitonic absorption onset at 859 nm) and Carbon Nanospheres (CNS) were prepared by assembling them onto a mesoporous TiO2 electrode for the first time. Carbon Nanospheres were prepared from starch by an acid treatment and they were dissolved in ethanol and deposited onto TiO2 electrophoretically. CdS QDs were formed over TiO2 and the TiO2/CNS electrodes by SILAR (Successive Ionic Layer Absorption and Reaction) method and CdSeTe QDs were deposited over them by an electrophoretic deposition method. Both the electrodes (photoanode and cathode) were characterized by electron microscopy, cyclic voltammetry, Raman and X-ray diffraction analyses. QDSSCs were constructed with photoanodes of different compositions, and with a 0.1 M Na2S in water-methanol (3:7) solution as electrolyte and a Reduced Graphene oxide based counter electrode. The best overall power conversion efficiency was achieved for the TiO2/CNS/CdS/CdSeTe photoanode-based cell and it is 2.82%. The use of a near-infrared absorber like CdSeTe and electron acceptors like Carbon nanospheres in realizing remarkable improvements in solar-cell performance metrics is demonstrated.

[error in script]
IITH Creators:
IITH CreatorsORCiD
Item Type: Thesis (Masters)
Uncontrolled Keywords: Cds/CdSeTe, Quantum Dot Sensifized solar cell, TD321
Subjects: ?? sub5.8 ??
Divisions: Department of Chemistry
Depositing User: Library Staff
Date Deposited: 07 May 2015 04:12
Last Modified: 10 Jul 2015 06:05
URI: http://raiith.iith.ac.in/id/eprint/1485
Publisher URL:
Related URLs:

Actions (login required)

View Item View Item
Statistics for RAIITH ePrint 1485 Statistics for this ePrint Item