Enhanced Performance of Nanowire-Based All-TiO2 Solar Cells using Subnanometer-Thick Atomic Layer Deposited ZnO Embedded Layer
Date
2015
Editor(s)
Advisor
Supervisor
Co-Advisor
Co-Supervisor
Instructor
Source Title
Electrochimica Acta
Print ISSN
0013-4686
Electronic ISSN
Publisher
Pergamon Press
Volume
157
Issue
Pages
23 - 30
Language
English
Type
Journal Title
Journal ISSN
Volume Title
Series
Abstract
In this paper, the effect of angstrom-thick atomic layer deposited (ALD) ZnO embedded layer on photovoltaic (PV) performance of Nanowire-Based All-TiO2 solar cells has been systematically investigated. Our results indicate that by varying the thickness of ZnO layer the efficiency of the solar cell can be significantly changed. It is shown that the efficiency has its maximum for optimal thickness of 1 ALD cycle in which this ultrathin ZnO layer improves device performance through passivation of surface traps without hampering injection efficiency of photogenerated electrons. The mechanisms contributing to this unprecedented change in PV performance of the cell have been scrutinized and discussed.
Course
Other identifiers
Book Title
Keywords
photoelectrochemical , photovoltaic , solar cells , titanium dioxide , Atoms , Cell engineering , Efficiency , Nanowires , Solar power generation , Zinc oxide , Atomic layer deposited , Device performance , Injection efficiency , Interface engineering , Optimal thickness , Photogenerated electrons , Photovoltaic , Atomic layer deposition